Sindhura Nrh, R. Bnvsr, Dayal Prasad Babu J, Raju Mrb
The present investigation was carried out during Kharif, 2021 at Regional Agricultural Research Station (RARS), Maruteru, with an objective to study the genetic parameters and magnitude of variability for yield enhancement. The experimental material comprised of 88 elite lines including checks namely, Maruteru Samba (MTU 1224), Sravani (MTU 1239), Maruteru Mahsuri (MTU 1262), Improved Samba Mahsuri, Swarna, TN1 and Krishnaveni which were evaluated in alpha lattice design with two replications. Observations on days to 50 % flowering, plant height (cm), ear bearing tillers per m2 , panicle length (cm), number of grains per panicle, test weight (g), spikelet fertility (%) and grain yield per plant (g) were recorded. The analysis of variance among 88 elite lines revealed the presence of significant differences for all 8 characters indicating the existence of variability in the material. The mean performance of the elite lines studied for yield and yield components revealed that the lines AM885, AM891 and AM913 significantly outperformed the superior yield check Sravani for panicle length, ear-bearing tillers per m2 , number of grains per panicle, test weight, and grain yield per plant. The genetic parameters revealed that high heritability coupled with high genetic advance as per cent of mean for the traits days to 50% flowering, plant height, panicle length, test weight, spikelet fertility and grain yield per plant.
{"title":"Assessment of Genetic Variability, Heritability and Genetic Advance for Grain Yield and Other Yield Attributing Traits in Elite Lines of Rice (Oryza sativa L.)","authors":"Sindhura Nrh, R. Bnvsr, Dayal Prasad Babu J, Raju Mrb","doi":"10.58297/cvtl7441","DOIUrl":"https://doi.org/10.58297/cvtl7441","url":null,"abstract":"The present investigation was carried out during Kharif, 2021 at Regional Agricultural Research Station (RARS), Maruteru, with an objective to study the genetic parameters and magnitude of variability for yield enhancement. The experimental material comprised of 88 elite lines including checks namely, Maruteru Samba (MTU 1224), Sravani (MTU 1239), Maruteru Mahsuri (MTU 1262), Improved Samba Mahsuri, Swarna, TN1 and Krishnaveni which were evaluated in alpha lattice design with two replications. Observations on days to 50 % flowering, plant height (cm), ear bearing tillers per m2 , panicle length (cm), number of grains per panicle, test weight (g), spikelet fertility (%) and grain yield per plant (g) were recorded. The analysis of variance among 88 elite lines revealed the presence of significant differences for all 8 characters indicating the existence of variability in the material. The mean performance of the elite lines studied for yield and yield components revealed that the lines AM885, AM891 and AM913 significantly outperformed the superior yield check Sravani for panicle length, ear-bearing tillers per m2 , number of grains per panicle, test weight, and grain yield per plant. The genetic parameters revealed that high heritability coupled with high genetic advance as per cent of mean for the traits days to 50% flowering, plant height, panicle length, test weight, spikelet fertility and grain yield per plant.","PeriodicalId":17022,"journal":{"name":"Journal of Rice Research and Developments","volume":"816 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77542620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Morphological characterization of 12 advanced coloured rice genotypes was carried out using 39 morphological descriptors during Kharif, 2021 at Agricultural Research Station, Bapatla and the results revealed that 20 out of 39 characters showed variation. Estimates of Shannon weaver diversity indices for the characters studied ranged from 0 to 0.81. The highest diversity index of 0.81 was exhibited by the Flag leaf: attitude of the blade (late observation). Cluster analysis revealed that BPT2858 from cluster I was unique when compared to other cultures. DUS characterization of advanced rice genotypes helps the plant breeder to maintain the cultures with 100 % genetic purity and the cultures can also be used as parents in the breeding programmes based on the objective.
{"title":"Morphological Characterization of Advanced Coloured Rice Genotypes","authors":"Tushara M, K. B, S. N","doi":"10.58297/reoj2415","DOIUrl":"https://doi.org/10.58297/reoj2415","url":null,"abstract":"Morphological characterization of 12 advanced coloured rice genotypes was carried out using 39 morphological descriptors during Kharif, 2021 at Agricultural Research Station, Bapatla and the results revealed that 20 out of 39 characters showed variation. Estimates of Shannon weaver diversity indices for the characters studied ranged from 0 to 0.81. The highest diversity index of 0.81 was exhibited by the Flag leaf: attitude of the blade (late observation). Cluster analysis revealed that BPT2858 from cluster I was unique when compared to other cultures. DUS characterization of advanced rice genotypes helps the plant breeder to maintain the cultures with 100 % genetic purity and the cultures can also be used as parents in the breeding programmes based on the objective.","PeriodicalId":17022,"journal":{"name":"Journal of Rice Research and Developments","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76228570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Katarni is a non-basmati traditional aromatic rice cultivar being grown in the Bhagalpur, Banka, and Munger districts of Bihar. However, it is weak-strawed, tall, prone to lodging, and late maturing. Attempt was made to develop a semi-dwarf and early maturing lines of Katarni by crossing with three semi-dwarf high-yielding cultivars and was advanced to F5 generation. In this study, 54 derived lines of Katarni were studied on the basis of 14 morphological traits. Five principal components (PCs) were observed which contributed 70% of cumulative variability and exhibited Eigenvalues> 1. The first PC (23.31%) and the second PC (35.59%) showed a cumulative variation of 63.90%. On the basis of genotype by trait biplot analysis, flag leaf length, plant height, and fragrance were found to be strongly positive. Genotypes biplot study revealed diverse genotypes like KIR-46 KIR-48, KRS-39, KRS-43, KRS-15, KRS-19, KRS-8, KRS-25, and KMTU-52 which can be further exploited for varietal development.
{"title":"Estimation of Genetic Diversity by Principal Component Analysis of Yield Attributing Traits in Katarni Derived Lines","authors":"Divya Mahto, Singh Pk, Parveen Rabiya, Sareeta Nahakpam, Mankesh Kumar -","doi":"10.58297/owfq8879","DOIUrl":"https://doi.org/10.58297/owfq8879","url":null,"abstract":"Katarni is a non-basmati traditional aromatic rice cultivar being grown in the Bhagalpur, Banka, and Munger districts of Bihar. However, it is weak-strawed, tall, prone to lodging, and late maturing. Attempt was made to develop a semi-dwarf and early maturing lines of Katarni by crossing with three semi-dwarf high-yielding cultivars and was advanced to F5 generation. In this study, 54 derived lines of Katarni were studied on the basis of 14 morphological traits. Five principal components (PCs) were observed which contributed 70% of cumulative variability and exhibited Eigenvalues> 1. The first PC (23.31%) and the second PC (35.59%) showed a cumulative variation of 63.90%. On the basis of genotype by trait biplot analysis, flag leaf length, plant height, and fragrance were found to be strongly positive. Genotypes biplot study revealed diverse genotypes like KIR-46 KIR-48, KRS-39, KRS-43, KRS-15, KRS-19, KRS-8, KRS-25, and KMTU-52 which can be further exploited for varietal development.","PeriodicalId":17022,"journal":{"name":"Journal of Rice Research and Developments","volume":"80 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80964738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The experiment on 113 genotypes (aromatic and non-aromatic rice) including three checks viz., Sarjoo 52, FL 478, and CSR 10 of rice (Oryza sativa L.) was conducted to work out the identification of elite genotypes based on grain yield and their various yield attributing traits. The grain yield per plant ranged from 8.898g for NDRK 50047 to 24.658g in the case of IR 13 T 141 with a general mean of 16.464g. Out of 113 genotypes, thirty-six genotypes produced significantly higher grain yield per plant than the general mean. The best ten genotypes for higher grain yield per plant were IR 13 T 141, IR 11 T 230, IR 13 T 145, IR 12 T 147, IR 11 T 171, IR 11 T 132, IR 11 T 205, IR 12 T 193, AT 401, and CSR 43. Similarly, the genotypes showed that very high mean performance in the desired direction for various characters; may also be used as donors for improving the characters for which they had high mean performance in yield and yield contributing traits. The availability of large genetic variability, as well as the nature of heritability and gene actions, are all important factors in the success of selection in improving plant traits. The basic material for a plant breeding programme is genetic diversity, which is used to generate superior genotypes through selection.
{"title":"Assessment of Sodicity Tolerance in Rice (Oryza sativa L.) Germplasm","authors":"S. Shrivastav, Verma Op, Kanhaiya Lal -, S. -","doi":"10.58297/rzmp1870","DOIUrl":"https://doi.org/10.58297/rzmp1870","url":null,"abstract":"The experiment on 113 genotypes (aromatic and non-aromatic rice) including three checks viz., Sarjoo 52, FL 478, and CSR 10 of rice (Oryza sativa L.) was conducted to work out the identification of elite genotypes based on grain yield and their various yield attributing traits. The grain yield per plant ranged from 8.898g for NDRK 50047 to 24.658g in the case of IR 13 T 141 with a general mean of 16.464g. Out of 113 genotypes, thirty-six genotypes produced significantly higher grain yield per plant than the general mean. The best ten genotypes for higher grain yield per plant were IR 13 T 141, IR 11 T 230, IR 13 T 145, IR 12 T 147, IR 11 T 171, IR 11 T 132, IR 11 T 205, IR 12 T 193, AT 401, and CSR 43. Similarly, the genotypes showed that very high mean performance in the desired direction for various characters; may also be used as donors for improving the characters for which they had high mean performance in yield and yield contributing traits. The availability of large genetic variability, as well as the nature of heritability and gene actions, are all important factors in the success of selection in improving plant traits. The basic material for a plant breeding programme is genetic diversity, which is used to generate superior genotypes through selection.","PeriodicalId":17022,"journal":{"name":"Journal of Rice Research and Developments","volume":"42 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90275416","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The conventional method of transplanting rice is labour-intensive, requires more water, and involves drudgery. Keeping this in view, large-scale front-line multi-location demonstrations of a modified mat nursery followed by mechanized rice transplanting under a slightly modified system of rice intensification (SMSRI) was conducted in the erstwhile Karimnagar District of Telangana to overcome the problem of labour, saving time and cost. The demonstrations recorded the highest grain yield (7512 kg ha-1) than the conventional method (7029 kg ha-1). This method saved around Rs. 4500 – 6250 ha-1 on nursery raising and transplanting. Timely transplanting was carried out during peak periods of labour shortage. Therefore, there is a need to develop small self-propelled transplanters with suitable power weeders as a national strategy to increase the area under mechanization.
传统的插秧方法是劳动密集型的，需要更多的水，而且很辛苦。考虑到这一点，在泰伦加纳邦的Karimnagar地区进行了大规模的前线多地点示范，改进的垫苗，然后在稍微改进的水稻集约化系统(SMSRI)下进行机械化水稻移植，以克服劳动力问题，节省时间和成本。试验结果表明，该方法的籽粒产量最高(7512 kg hm -1)，高于常规方法(7029 kg hm -1)。这种方法节省了大约4500 - 6250公顷/公顷的苗圃培育和移植费用。在劳动力短缺高峰期，及时进行移栽。因此，有必要开发小型自行式移栽机和合适的动力除草机，作为增加机械化面积的国家战略。
{"title":"Modified Mat Nursery and SMSRI -A Climate Smart Mechanization Practice in Rice","authors":"Shekar K","doi":"10.58297/myea7162","DOIUrl":"https://doi.org/10.58297/myea7162","url":null,"abstract":"The conventional method of transplanting rice is labour-intensive, requires more water, and involves drudgery. Keeping this in view, large-scale front-line multi-location demonstrations of a modified mat nursery followed by mechanized rice transplanting under a slightly modified system of rice intensification (SMSRI) was conducted in the erstwhile Karimnagar District of Telangana to overcome the problem of labour, saving time and cost. The demonstrations recorded the highest grain yield (7512 kg ha-1) than the conventional method (7029 kg ha-1). This method saved around Rs. 4500 – 6250 ha-1 on nursery raising and transplanting. Timely transplanting was carried out during peak periods of labour shortage. Therefore, there is a need to develop small self-propelled transplanters with suitable power weeders as a national strategy to increase the area under mechanization.","PeriodicalId":17022,"journal":{"name":"Journal of Rice Research and Developments","volume":"99 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90344694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Paddy is a major food crop having significance for millions of farmers. It is grown under paddy-wheat cropping system on a vast area in India. In Punjab state continuous need is felt to increase area under short duration (SD) paddy varieties for better crop yield and to save irrigation water. Thus, adoption of these SD varieties and optimal fertilizer use are major factors that can contribute to enhanced paddy productivity in short time span. The present study was carried out in district Moga of Punjab state for five consecutive years i.e., 2017-18 to 2021-22 using the interview method for data collection from 30 respondents from each of the five blocks of the district. Analysis revealed that paddy cultivation is diversified in the district as basmati and non-basmati types along with different varieties that are being cultivated here. The area under recommended varieties has increased significantly among non-basmati paddy, unrecommended long duration variety Pusa 44 is the most preferred throughout the study period followed by Dogar Pusa due to high yield. SD varieties occupy only about 18 per cent paddy area. Only about 2 to 4 per cent of the total paddy area was transplanted before 10th of June each year except during 2020-21 Covid 19 pandemic period. Further, excessive use of fertilizer-Nitrogen by farmers in the form of urea was observed. A rise in the proportion of farmers (69% to 73%) in a span of five years which discontinued the practice of applying phosphorus to the paddy crop was also observed. The data on adoption status may help the extension agencies to focus on bridging the gap to enhance the yield of paddy and basmati and thus, income of farmers along with conservation of natural resources.
{"title":"Adoption Status of Improved Paddy Varieties and Fertilizer Use in Moga District of Punjab","authors":"Sangeet Ranguwal, Mavi Hk","doi":"10.58297/dkun5024","DOIUrl":"https://doi.org/10.58297/dkun5024","url":null,"abstract":"Paddy is a major food crop having significance for millions of farmers. It is grown under paddy-wheat cropping system on a vast area in India. In Punjab state continuous need is felt to increase area under short duration (SD) paddy varieties for better crop yield and to save irrigation water. Thus, adoption of these SD varieties and optimal fertilizer use are major factors that can contribute to enhanced paddy productivity in short time span. The present study was carried out in district Moga of Punjab state for five consecutive years i.e., 2017-18 to 2021-22 using the interview method for data collection from 30 respondents from each of the five blocks of the district. Analysis revealed that paddy cultivation is diversified in the district as basmati and non-basmati types along with different varieties that are being cultivated here. The area under recommended varieties has increased significantly among non-basmati paddy, unrecommended long duration variety Pusa 44 is the most preferred throughout the study period followed by Dogar Pusa due to high yield. SD varieties occupy only about 18 per cent paddy area. Only about 2 to 4 per cent of the total paddy area was transplanted before 10th of June each year except during 2020-21 Covid 19 pandemic period. Further, excessive use of fertilizer-Nitrogen by farmers in the form of urea was observed. A rise in the proportion of farmers (69% to 73%) in a span of five years which discontinued the practice of applying phosphorus to the paddy crop was also observed. The data on adoption status may help the extension agencies to focus on bridging the gap to enhance the yield of paddy and basmati and thus, income of farmers along with conservation of natural resources.","PeriodicalId":17022,"journal":{"name":"Journal of Rice Research and Developments","volume":"28 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83730332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Beulah P, M. Y, N. P., Veerendra J, L. R., Madhusudan N, Bhargava K, R. P, Kemparaju Kb, Sruthi K, H. As, Sundaram Rm, Ravindra Babu V, Krishna Satya A, S. P, S. P
Fertility restoration is a very important trait for the WA-CMS system in hybrid rice. Fifty-five BILs derived from KMR3 and FL478 cross combination possessing Saltol1 generated through Marker Assisted Backcross Breeding (MABB) approach were screened using Rf4 and Rf3 markers during Rabi 2021. The use of molecular markers tightly linked with fertility restoration aided in identifying promising groups of restorers, maintainers, partial restorers, and partial maintainers. The presence of both Rf4 and Rf3 alleles among the nineteen BILs was 35% which showed a clear difference in the marker distribution among the BILs. The BILs namely TCP32, TCP34, TCP35, TCP36, TCP36-3, TCP37-2, TCP38, TCP13, TCP18, TCP19, TCP45, TCP46, TCP48, TCP54, TCP56, TCP57-1, TCP60, TCP61, TCP61-3 were identified as promising restorers possessing both Rf4 and Rf3 genes. The current study reflects that Rf4 and Rf3 genes in combination help in the breeding of WA-CMS-based hybrids in Saltol introgressed restorers with better heterosis under various ecologies, especially coastal saline areas.
{"title":"Evaluation of Salinity-Tolerant Backcrossed Inbre Lines (BILs) For Fertility Restoration Using Molecula Markers","authors":"Beulah P, M. Y, N. P., Veerendra J, L. R., Madhusudan N, Bhargava K, R. P, Kemparaju Kb, Sruthi K, H. As, Sundaram Rm, Ravindra Babu V, Krishna Satya A, S. P, S. P","doi":"10.58297/rqvq6630","DOIUrl":"https://doi.org/10.58297/rqvq6630","url":null,"abstract":"Fertility restoration is a very important trait for the WA-CMS system in hybrid rice. Fifty-five BILs derived from KMR3 and FL478 cross combination possessing Saltol1 generated through Marker Assisted Backcross Breeding (MABB) approach were screened using Rf4 and Rf3 markers during Rabi 2021. The use of molecular markers tightly linked with fertility restoration aided in identifying promising groups of restorers, maintainers, partial restorers, and partial maintainers. The presence of both Rf4 and Rf3 alleles among the nineteen BILs was 35% which showed a clear difference in the marker distribution among the BILs. The BILs namely TCP32, TCP34, TCP35, TCP36, TCP36-3, TCP37-2, TCP38, TCP13, TCP18, TCP19, TCP45, TCP46, TCP48, TCP54, TCP56, TCP57-1, TCP60, TCP61, TCP61-3 were identified as promising restorers possessing both Rf4 and Rf3 genes. The current study reflects that Rf4 and Rf3 genes in combination help in the breeding of WA-CMS-based hybrids in Saltol introgressed restorers with better heterosis under various ecologies, especially coastal saline areas.","PeriodicalId":17022,"journal":{"name":"Journal of Rice Research and Developments","volume":"46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79991400","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
S. P, Sundaram Rm, H. As, S. Lv, Anantha Ms, G. C., S. Kota, Abdul Fiyaz R, Divya Balakrishnan, R. P, Saibaba Sv, Mangrauthia Sk, Sruthi K, Kemparaju Kb, Swamy Avsr, Padmavathi G, S. B, Sheshu Madhav M, Neeraja Cn, Kumar Rm, Prasad Ms, B. Parmar, M. Tuti, N. B., Muthuraman P, Sadath Ali M, Koteshwar Rao P, C. U, J. V, Beulah P, N. P.
DRR Dhan 57 [IET 26171 (RP 5601-283-14-4-1)], an aerobic rice variety was developed from BPT5204/ Azucena cross combination. It was evaluated in AICRIP multi-location aerobic rice trials during the wet seasons of 2016 to 2020. DRR Dhan 57 consistently outperformed the check varieties in Eastern Zone (Zone III) and Central Zone (Zone V) with a mean grain yield of 4782 kg/ha, which is 13%, 17% and 16 % higher than the National, Zonal and Local checks, respectively. In addition, it exhibited moderate resistance to leaf blast and Neck blast; and to gall midge and rice thrips, and moderate resistance to planthoppers and whorl maggot. DRR Dhan 57 has a mid-early duration of 120 days (seed to seed) and possesses desirable grain and cooking quality parameters. It was released for cultivation in aerobic ecosystems of Jharkhand (Zone III), and Chhattisgarh (Zone V) states through Central Sub-committee on Crop Standards, Notification and Release of Varieties for Agricultural Crops; vide S.O. 8(E) dated 24th December 2021[CG-DL-E-04012022-232406].
{"title":"DRR Dhan 57 (IET 26171) – an Aerobic Rice Variety","authors":"S. P, Sundaram Rm, H. As, S. Lv, Anantha Ms, G. C., S. Kota, Abdul Fiyaz R, Divya Balakrishnan, R. P, Saibaba Sv, Mangrauthia Sk, Sruthi K, Kemparaju Kb, Swamy Avsr, Padmavathi G, S. B, Sheshu Madhav M, Neeraja Cn, Kumar Rm, Prasad Ms, B. Parmar, M. Tuti, N. B., Muthuraman P, Sadath Ali M, Koteshwar Rao P, C. U, J. V, Beulah P, N. P.","doi":"10.58297/mdjq7071","DOIUrl":"https://doi.org/10.58297/mdjq7071","url":null,"abstract":"DRR Dhan 57 [IET 26171 (RP 5601-283-14-4-1)], an aerobic rice variety was developed from BPT5204/ Azucena cross combination. It was evaluated in AICRIP multi-location aerobic rice trials during the wet seasons of 2016 to 2020. DRR Dhan 57 consistently outperformed the check varieties in Eastern Zone (Zone III) and Central Zone (Zone V) with a mean grain yield of 4782 kg/ha, which is 13%, 17% and 16 % higher than the National, Zonal and Local checks, respectively. In addition, it exhibited moderate resistance to leaf blast and Neck blast; and to gall midge and rice thrips, and moderate resistance to planthoppers and whorl maggot. DRR Dhan 57 has a mid-early duration of 120 days (seed to seed) and possesses desirable grain and cooking quality parameters. It was released for cultivation in aerobic ecosystems of Jharkhand (Zone III), and Chhattisgarh (Zone V) states through Central Sub-committee on Crop Standards, Notification and Release of Varieties for Agricultural Crops; vide S.O. 8(E) dated 24th December 2021[CG-DL-E-04012022-232406].","PeriodicalId":17022,"journal":{"name":"Journal of Rice Research and Developments","volume":"69 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76832259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The present investigation was carried out at the Indian Institute of Rice Research farm, ICRISAT, Hyderabad with 31 genotypes of rice in a randomized block design with three replications, and observations were recorded on grain yield, yield components and quality characters. Analysis of variance revealed significant differences among the genotypes for all characters studied. The studies on variability, heritability and genetic advance as per cent mean thus revealed high GCV and PCV for grains panicle-1 and iron content. High heritability coupled with high genetic advance as per cent mean was recorded for plant height, ear bearing tillers plant-1, grains panicle-1, grain yield plant-1 and iron content indicating, the effectiveness of simple selection for improvement of these traits. The results on character associations and path analysis revealed positive and significant association coupled with high positive direct effect for ear bearing tillers plant-1, panicle length, grains panicle-1, and amylose content indicating the effectiveness of direct selection for these traits in the improvement of grain yield plant-1. However, for test weight, days to 50 percent flowering, plant height, head rice recovery (%), and zinc content, indirect effects seemed to be the cause of correlation, while for days to maturity, protein and iron content, the use of restricted simultaneous selection model is suggested with restrictions imposed for nullifying the undesirable indirect effects in order to make use of the high positive direct effect observed for these traits on grain yield plant-1.
本研究采用3个重复的随机区组设计，在印度海得拉巴ICRISAT印度水稻研究所(ICRISAT india Institute of Rice Research)的农场进行了31个基因型水稻的试验，对籽粒产量、产量组成和品质性状进行了观察。方差分析显示各性状基因型间差异显著。变异率、遗传率和遗传进步率的研究表明，籽粒1穗和铁含量的GCV和PCV较高。株高、穗分蘖1号、穗粒1号、产量1号和铁含量均有较高的遗传率和遗传推进率，表明了简单选择改良这些性状的有效性。性状关联和通径分析结果显示，结实分蘖株系1号、穗长、粒穗1号和直链淀粉含量呈正相关且直接效应高，说明直接选择在籽粒产量改良中是有效的。然而，对于试重、开花日数至50%、株高、抽穗回收率(%)和锌含量，间接效应似乎是相关的原因，而对于成熟日数、蛋白质和铁含量，建议使用限制性同时选择模型，通过限制来抵消不良的间接效应，以利用这些性状对籽粒产量的高正直接效应。
{"title":"Exploration of Genetic Variability and Trait Association in High Protein Landraces of Rice (Oryza sativa L.)","authors":"B. B, S. Y, A. J, Sreenivas Kn","doi":"10.58297/izoz6097","DOIUrl":"https://doi.org/10.58297/izoz6097","url":null,"abstract":"The present investigation was carried out at the Indian Institute of Rice Research farm, ICRISAT, Hyderabad with 31 genotypes of rice in a randomized block design with three replications, and observations were recorded on grain yield, yield components and quality characters. Analysis of variance revealed significant differences among the genotypes for all characters studied. The studies on variability, heritability and genetic advance as per cent mean thus revealed high GCV and PCV for grains panicle-1 and iron content. High heritability coupled with high genetic advance as per cent mean was recorded for plant height, ear bearing tillers plant-1, grains panicle-1, grain yield plant-1 and iron content indicating, the effectiveness of simple selection for improvement of these traits. The results on character associations and path analysis revealed positive and significant association coupled with high positive direct effect for ear bearing tillers plant-1, panicle length, grains panicle-1, and amylose content indicating the effectiveness of direct selection for these traits in the improvement of grain yield plant-1. However, for test weight, days to 50 percent flowering, plant height, head rice recovery (%), and zinc content, indirect effects seemed to be the cause of correlation, while for days to maturity, protein and iron content, the use of restricted simultaneous selection model is suggested with restrictions imposed for nullifying the undesirable indirect effects in order to make use of the high positive direct effect observed for these traits on grain yield plant-1.","PeriodicalId":17022,"journal":{"name":"Journal of Rice Research and Developments","volume":"128 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84785984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Rice (Oryza sativa L.) is one of the most important staple food crops of the world and the yield of rice is stagnated for several decades because of a narrow genetic base. African cultivated species, Oryza glaberrima, is a potent source for broadening the genetic base of O. sativa cultivars. In this investigation, a total of 232 F2 population derived from a cross between O. glaberrima derived introgression line and O. sativa cv. Samba Mahsuri was characterised by yield and yield-attributing traits. A great range of variability was noticed for the number of tillers, number of panicles, and yield per plant. The PCV values were on par with GCV for all yield and yield-attributing variables, indicating a low environmental influence. High heritability coupled with moderate to high GAM was recorded in all traits, indicating the presence of additive gene effect and direct selection of these characters might be effective. Panicle length (0.18**), the number of tillers (0.29**), and panicles (0.31**) found a significant positive correlation with yield per plant. The findings of the current study have demonstrated the usefulness of O. glaberrima germplasm and its potential for use in the genetic development of indica rice varieties, specifically for the yield-enhancing trait.
{"title":"Genetic Analysis for Yield and Yield Attributing Traits in Oryza glaberrima Derived Introgression Line and O. sativa cv. Samba Mahsuri","authors":"U. V, R. M, Laha Gs, Reddy Vln, S. P, G. C.","doi":"10.58297/bnwt2744","DOIUrl":"https://doi.org/10.58297/bnwt2744","url":null,"abstract":"Rice (Oryza sativa L.) is one of the most important staple food crops of the world and the yield of rice is stagnated for several decades because of a narrow genetic base. African cultivated species, Oryza glaberrima, is a potent source for broadening the genetic base of O. sativa cultivars. In this investigation, a total of 232 F2 population derived from a cross between O. glaberrima derived introgression line and O. sativa cv. Samba Mahsuri was characterised by yield and yield-attributing traits. A great range of variability was noticed for the number of tillers, number of panicles, and yield per plant. The PCV values were on par with GCV for all yield and yield-attributing variables, indicating a low environmental influence. High heritability coupled with moderate to high GAM was recorded in all traits, indicating the presence of additive gene effect and direct selection of these characters might be effective. Panicle length (0.18**), the number of tillers (0.29**), and panicles (0.31**) found a significant positive correlation with yield per plant. The findings of the current study have demonstrated the usefulness of O. glaberrima germplasm and its potential for use in the genetic development of indica rice varieties, specifically for the yield-enhancing trait.","PeriodicalId":17022,"journal":{"name":"Journal of Rice Research and Developments","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83899084","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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