Micronutrient deficiency is one of the major challenges for food security in developing nations. There is a need for the identification of micronutrient-rich genotypes for their direct use in the genetic enhancement of staple food crops using plant breeding strategies. In the present study, grain iron (Fe) and zinc (Zn) contents of 29 accessions of Oryza glaberrima along with check varieties were analyzed for three seasons. Grain Fe ranged from 6.40 ppm to 12.10 ppm with a mean of 8.57 ppm, while Zn content exhibited manifold variation by ranging from 7.30 ppm to 34.40 ppm in the brown rice. There was a two-fold variation in Fe and Zn concentrations between accessions indicating the potential to boost these micronutrients in rice grain. Fifteen African rice accessions were better than the checks for grain Fe content, while four accessions outperformed checks with higher Zn content. Altogether, one O. glaberrima accession, CG 239 was found to be having high Zn content (34.7 ppm) in the brown rice making it a valuable source for biofortification of popular rice varieties using conventional and molecular approaches.
{"title":"Characterization of African Rice (Oryza glaberrima Steud.) Germplasm for Grain Iron and Zinc Content","authors":"Ishwarya Lakshmi VG, Kranthi Kiran Ch","doi":"10.58297/rmcn2142","DOIUrl":"https://doi.org/10.58297/rmcn2142","url":null,"abstract":"Micronutrient deficiency is one of the major challenges for food security in developing nations. There is a need for the identification of micronutrient-rich genotypes for their direct use in the genetic enhancement of staple food crops using plant breeding strategies. In the present study, grain iron (Fe) and zinc (Zn) contents of 29 accessions of Oryza glaberrima along with check varieties were analyzed for three seasons. Grain Fe ranged from 6.40 ppm to 12.10 ppm with a mean of 8.57 ppm, while Zn content exhibited manifold variation by ranging from 7.30 ppm to 34.40 ppm in the brown rice. There was a two-fold variation in Fe and Zn concentrations between accessions indicating the potential to boost these micronutrients in rice grain. Fifteen African rice accessions were better than the checks for grain Fe content, while four accessions outperformed checks with higher Zn content. Altogether, one O. glaberrima accession, CG 239 was found to be having high Zn content (34.7 ppm) in the brown rice making it a valuable source for biofortification of popular rice varieties using conventional and molecular approaches.","PeriodicalId":17022,"journal":{"name":"Journal of Rice Research and Developments","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134973709","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}
Senguttuvel P, Sundaram RM, Hari Prasad AS, Subba Rao LV, Gireesh C, Suneetha Kota, Anantha MS, Abdul Fiyaz R, Surekha K, Swamy AVSR, Sheshu Madhav M, Padmavathi G, Divya Balakrishnan, Neeraja CN, Muthuraman P, Nirmala B, Arun Kumar S, Jeykumar -, Brajendra P, Tuti MD, Prasad MS, Mahender Kumar R, Muralidhar Reddy, Sadath Ali M, Koteshwar Rao P, Nagarjuna E, Chaitanya U, Chandra Kumar M, Jaldhani V, Beulah P, Nagaraju P, Manasa Y, Chiranjeevi -
DRR Dhan 64 [IET 28358 (RP 5599-212-56-3-1)], an early transplanted rice variety was developed from MTU-1010/KMR-3R cross. It was evaluated in AICRIP multi-location ETP trials during wet seasons of 2019 to 2021. DRR Dhan 64 consistently out-performed the check varieties in Eastern Zone (Zone III) with a mean grain yield 5330 kg/ha, which is 8%, 28% and 12% higher than National check, Zonal and Local checks, respectively. In addition, it exhibited moderate resistance to Leaf blast and Neck blast; and also resistant to gall midge and rice thrips; and moderately resistant to planthoppers and whorl maggot. DRR Dhan 64 has early duration of 115-120 days (seed to seed) and possesses desirable grain and cooking quality parameters. It was released for cultivation in aerobic ecosystems of Bihar and West Bengal (Zone III) states through Central Sub-committee on Crop Standards, Notification and Release ofVarieties for Agricultural Crops vide S.O. 4065(E) dt. 31stAug 2022 [CG-DL-E-31082022-238490].
{"title":"DRR Dhan 64 - (IET 28358) - First Nitrogen Use Efficient, Early Transplanted Rice Variety","authors":"Senguttuvel P, Sundaram RM, Hari Prasad AS, Subba Rao LV, Gireesh C, Suneetha Kota, Anantha MS, Abdul Fiyaz R, Surekha K, Swamy AVSR, Sheshu Madhav M, Padmavathi G, Divya Balakrishnan, Neeraja CN, Muthuraman P, Nirmala B, Arun Kumar S, Jeykumar -, Brajendra P, Tuti MD, Prasad MS, Mahender Kumar R, Muralidhar Reddy, Sadath Ali M, Koteshwar Rao P, Nagarjuna E, Chaitanya U, Chandra Kumar M, Jaldhani V, Beulah P, Nagaraju P, Manasa Y, Chiranjeevi -","doi":"10.58297/tmhc5732","DOIUrl":"https://doi.org/10.58297/tmhc5732","url":null,"abstract":"DRR Dhan 64 [IET 28358 (RP 5599-212-56-3-1)], an early transplanted rice variety was developed from MTU-1010/KMR-3R cross. It was evaluated in AICRIP multi-location ETP trials during wet seasons of 2019 to 2021. DRR Dhan 64 consistently out-performed the check varieties in Eastern Zone (Zone III) with a mean grain yield 5330 kg/ha, which is 8%, 28% and 12% higher than National check, Zonal and Local checks, respectively. In addition, it exhibited moderate resistance to Leaf blast and Neck blast; and also resistant to gall midge and rice thrips; and moderately resistant to planthoppers and whorl maggot. DRR Dhan 64 has early duration of 115-120 days (seed to seed) and possesses desirable grain and cooking quality parameters. It was released for cultivation in aerobic ecosystems of Bihar and West Bengal (Zone III) states through Central Sub-committee on Crop Standards, Notification and Release ofVarieties for Agricultural Crops vide S.O. 4065(E) dt. 31stAug 2022 [CG-DL-E-31082022-238490].","PeriodicalId":17022,"journal":{"name":"Journal of Rice Research and Developments","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135831693","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}
Yield is the complex trait that depends on various attributes. Therefore, the knowledge about the relationship of different attributes to yield is crucial for making efficient selection strategy. The grain yield per plant exhibited highly significant and positive association with biological yield per plant followed by panicle bearing tillers per plant, spikelets per panicle, grains per panicle, chlorophyll content in F1 s at both genotypic and phenotypic level. Highest positive direct effect on grain yield per plant was exerted by biological yield per plant and harvest-index in F1 s at both genotypic and phenotypic level. Therefore, biological yield per plant and harvest index should be utilized in making selection strategy for yield improvement in rice.
{"title":"Correlation and Path Coefficients Analysis for Yield and its Contributing Traits in Rice (Oryza sativa L.) under Sodic Soil","authors":"Shiv Prakash Shrivastav, Verma OP","doi":"10.58297/gqok7001","DOIUrl":"https://doi.org/10.58297/gqok7001","url":null,"abstract":"Yield is the complex trait that depends on various attributes. Therefore, the knowledge about the relationship of different attributes to yield is crucial for making efficient selection strategy. The grain yield per plant exhibited highly significant and positive association with biological yield per plant followed by panicle bearing tillers per plant, spikelets per panicle, grains per panicle, chlorophyll content in F1 s at both genotypic and phenotypic level. Highest positive direct effect on grain yield per plant was exerted by biological yield per plant and harvest-index in F1 s at both genotypic and phenotypic level. Therefore, biological yield per plant and harvest index should be utilized in making selection strategy for yield improvement in rice.","PeriodicalId":17022,"journal":{"name":"Journal of Rice Research and Developments","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135895568","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}
Nitrogen (N) is one of the yield limiting nutrients for rice. Unwarranted usage of N fertilizer to achieve higher crop returns is affecting environment and increasing the cost of cultivation. A field experiment was conducted under two differential N experimental plots (N-Low and N-Rec) to evaluate the effect of N on photosynthesis, grain yield and nitrogen use efficiency (NUE) of six rice genotypes belonging to three diverse groups. At N-Rec, Kolajoha3 exhibited highest mean SCMR value (43.2), flag leaf length (39.0 cm), flag leaf width (1.77 cm), flag leaf area (53.8 cm2 ), photosynthetic rate (19.50 µmol CO2 m-2 s-1),stomatal conductance (0.38 mol [H2 O] m-2 s-1),transpiration rate (10.72 mmol [H2 O] m-2 s-1). IC463254 recorded highest mean grain yield (621.5 g m-2), total dry matter (1302.5 g m-2), harvest index (47.7%), grain N uptake (84.4 kg ha-1) and nitrogen use efficiency (18.2). Significant reduction in growth, photosynthetic rate and yield of rice occurred under N-Low compared with N-Rec. In comparison N-Rec, Kolajoha3 exhibited least mean reduction in plant height (10.68%), photosynthetic rate (14.96%), productive tiller number (35.40%), grain yield (50.63%), straw yield (24.83%), total dry matter (36.03%), agronomic efficiency (14.6%) and NUE (26.21%) under N-Low, while IC463254 exhibited least mean reduction in SCMR value (14.11%) and flag leaf width (23.66%).
氮(N)是水稻产量限制养分之一。为了获得更高的作物回报而不合理地使用氮肥正在影响环境并增加种植成本。在N- low和N- rec两个差异施氮试验区，研究了施氮对3个不同类群6个水稻基因型光合作用、产量和氮素利用效率的影响。在N-Rec条件下，Kolajoha3的平均SCMR值最高(43.2)，旗叶长(39.0 cm)，旗叶宽(1.77 cm)，旗叶面积(53.8 cm2)，光合速率(19.50µmol CO2 m-2 s-1)，气孔导度(0.38 mol [H2 O] m-2 s-1)，蒸腾速率(10.72 mmol [H2 O] m-2 s-1)。IC463254籽粒平均产量最高(621.5 g m-2)，总干物质最高(1302.5 g m-2)，收获指数最高(47.7%)，籽粒吸氮量最高(84.4 kg hm -1)，氮素利用效率最高(18.2)。与N-Rec相比，N-Low处理显著降低了水稻生长、光合速率和产量。与N-Rec相比，低氮处理下，Kolajoha3株高(10.68%)、光合速率(14.96%)、有效分蘖数(35.40%)、籽粒产量(50.63%)、秸秆产量(24.83%)、总干物质(36.03%)、农艺效率(14.6%)和氮素利用效率(26.21%)的平均降幅最小，IC463254的SCMR值(14.11%)和旗叶宽度(23.66%)的平均降幅最小。
{"title":"Genotypic Variation in Photosynthetic Traits, Grain Yield and Nitrogen Use Efficiency in Rice (Oryza sativa L.) Under Differential Nitrogen Levels","authors":"Jaldhani V, Srikanth B, Suman K, Malathi S, Vishnukiran T, Neeraja CN, Subrahmanyam D, Sanjeeva Rao D, Chaitanya U, Ramulu K, Senguttuvel P, Anantha MS, Sai Prasad SV, Sundaram RM, Rao PR","doi":"10.58297/uszc7294","DOIUrl":"https://doi.org/10.58297/uszc7294","url":null,"abstract":"Nitrogen (N) is one of the yield limiting nutrients for rice. Unwarranted usage of N fertilizer to achieve higher crop returns is affecting environment and increasing the cost of cultivation. A field experiment was conducted under two differential N experimental plots (N-Low and N-Rec) to evaluate the effect of N on photosynthesis, grain yield and nitrogen use efficiency (NUE) of six rice genotypes belonging to three diverse groups. At N-Rec, Kolajoha3 exhibited highest mean SCMR value (43.2), flag leaf length (39.0 cm), flag leaf width (1.77 cm), flag leaf area (53.8 cm2 ), photosynthetic rate (19.50 µmol CO2 m-2 s-1),stomatal conductance (0.38 mol [H2 O] m-2 s-1),transpiration rate (10.72 mmol [H2 O] m-2 s-1). IC463254 recorded highest mean grain yield (621.5 g m-2), total dry matter (1302.5 g m-2), harvest index (47.7%), grain N uptake (84.4 kg ha-1) and nitrogen use efficiency (18.2). Significant reduction in growth, photosynthetic rate and yield of rice occurred under N-Low compared with N-Rec. In comparison N-Rec, Kolajoha3 exhibited least mean reduction in plant height (10.68%), photosynthetic rate (14.96%), productive tiller number (35.40%), grain yield (50.63%), straw yield (24.83%), total dry matter (36.03%), agronomic efficiency (14.6%) and NUE (26.21%) under N-Low, while IC463254 exhibited least mean reduction in SCMR value (14.11%) and flag leaf width (23.66%).","PeriodicalId":17022,"journal":{"name":"Journal of Rice Research and Developments","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135287477","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}
Senguttuvel P, Hari Prasad AS, Sundaram RM, Revathi P, Kemparaju KB, Sruthi K, Subba Rao LV, Aravind Kumar J, Sheshu Madhav M, Muthuraman P, Laha GS, Nirmala B, Amtul Waris, Sreedevi B, Somasekhar N, Kannan C, Prasad MS, Mahender Kumar R, Sadath Ali M, Koteshwar Rao P, Nagarjuna E, Beulah P, Jaldhani V, Sravan Raju N, Nagaraju -, Manasa Y
DRRH-4 [IET 27937 (IIRRH-124)], is an aerobic rice hybrid developed from APMS-6A / AR 9-18 cross. It was evaluated in AICRIP multi-location aerobic rice trials during wet seasons of 2018 to 2021. DRRH-4 consistently out-performed the check varieties in Punjab, Odisha, Chhattisgarh, Tripura and Gujarat states with a mean grain yield 5030 kg/ha, which is 32%, 28%, 22% and 11% higher than national check, zonal, local and hybrid checks, respectively. In addition, it exhibited moderate resistance to leaf blast, neck blast, gall midge, rice stem borer, and whorl maggot. DRRH-4 has early duration of 120 days (seed to seed) and possess desirable grain and cooking quality parameters. It was released for cultivation in aerobic ecosystems of Punjab, Odisha, Chhattisgarh, Tripura and Gujarat states through Central Sub-committee on Crop Standards, Notification and Release of Varieties for Agricultural Crops vide S.O. 4065(E) dt. 31st Aug., 2022 [CG-DL-E-31082022-238490].
{"title":"DRRH-4 (IET 27937) - World’s First Public Bred Aerobic Rice Hybrid","authors":"Senguttuvel P, Hari Prasad AS, Sundaram RM, Revathi P, Kemparaju KB, Sruthi K, Subba Rao LV, Aravind Kumar J, Sheshu Madhav M, Muthuraman P, Laha GS, Nirmala B, Amtul Waris, Sreedevi B, Somasekhar N, Kannan C, Prasad MS, Mahender Kumar R, Sadath Ali M, Koteshwar Rao P, Nagarjuna E, Beulah P, Jaldhani V, Sravan Raju N, Nagaraju -, Manasa Y","doi":"10.58297/kcix9658","DOIUrl":"https://doi.org/10.58297/kcix9658","url":null,"abstract":"DRRH-4 [IET 27937 (IIRRH-124)], is an aerobic rice hybrid developed from APMS-6A / AR 9-18 cross. It was evaluated in AICRIP multi-location aerobic rice trials during wet seasons of 2018 to 2021. DRRH-4 consistently out-performed the check varieties in Punjab, Odisha, Chhattisgarh, Tripura and Gujarat states with a mean grain yield 5030 kg/ha, which is 32%, 28%, 22% and 11% higher than national check, zonal, local and hybrid checks, respectively. In addition, it exhibited moderate resistance to leaf blast, neck blast, gall midge, rice stem borer, and whorl maggot. DRRH-4 has early duration of 120 days (seed to seed) and possess desirable grain and cooking quality parameters. It was released for cultivation in aerobic ecosystems of Punjab, Odisha, Chhattisgarh, Tripura and Gujarat states through Central Sub-committee on Crop Standards, Notification and Release of Varieties for Agricultural Crops vide S.O. 4065(E) dt. 31st Aug., 2022 [CG-DL-E-31082022-238490].","PeriodicalId":17022,"journal":{"name":"Journal of Rice Research and Developments","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135472873","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 undertaken to study the extent of variability and correlation coefficients of 19 morphological traits, yield components, physiological and physico-chemical grain quality traits in a set of 30 high yielding diverse rice genotypes. Phenotypic and genotypic coefficients of variations were high for net assimilation rate at 60-90 DAT followed by grain yield/plant and volume expansion ratio. Moderate to high heritability estimates were recorded for all parameters under study except for productive tillers/plant. The perusal of results on association and path coefficient analysis revealed that significant and positive correlation coupled with positive direct effects were manifested by test weight, RWC at 60 DAT and harvest index indicating simultaneous improvement of grain yield along with the improvement of these characters.
{"title":"Genetic Parameters and Association Studies for Morphological, Physiological and Grain Quality Parameters in Rice (Oryza sativa L.)","authors":"Priyanka K, Krishna Veni B, Roja V, Jayalalitha K","doi":"10.58297/ilxo7227","DOIUrl":"https://doi.org/10.58297/ilxo7227","url":null,"abstract":"The present investigation was undertaken to study the extent of variability and correlation coefficients of 19 morphological traits, yield components, physiological and physico-chemical grain quality traits in a set of 30 high yielding diverse rice genotypes. Phenotypic and genotypic coefficients of variations were high for net assimilation rate at 60-90 DAT followed by grain yield/plant and volume expansion ratio. Moderate to high heritability estimates were recorded for all parameters under study except for productive tillers/plant. The perusal of results on association and path coefficient analysis revealed that significant and positive correlation coupled with positive direct effects were manifested by test weight, RWC at 60 DAT and harvest index indicating simultaneous improvement of grain yield along with the improvement of these characters.","PeriodicalId":17022,"journal":{"name":"Journal of Rice Research and Developments","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136230238","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}
Leena Kumary S, Ambily AK, Devika R R, Surendran M, Nimmy Jose, Jyothi Sara Jacob, Gayathri P
KAU Pournami (MO 23; KAUM 109-1-2-1; IET 23739) is a high yielding photo-insensitive, medium duration, medium-bold red rice variety with an average productivity of 7000-7500 kg ha-1, released from Kerala Agricultural University. It is developed from the cross between NHTA 8 and Aruna (MO 8). It has got high milling quality in terms of Head Rice Recovery and better cooking quality compared to the popular variety Uma. It is moderately tolerant to sheath blight, sheath rot, BPH and gall midge. The variety was notified by the Government of India during 2021.
{"title":"KAU Pournami (MO 23): A High Yielding Red Rice Variety","authors":"Leena Kumary S, Ambily AK, Devika R R, Surendran M, Nimmy Jose, Jyothi Sara Jacob, Gayathri P","doi":"10.58297/vzrt9733","DOIUrl":"https://doi.org/10.58297/vzrt9733","url":null,"abstract":"KAU Pournami (MO 23; KAUM 109-1-2-1; IET 23739) is a high yielding photo-insensitive, medium duration, medium-bold red rice variety with an average productivity of 7000-7500 kg ha-1, released from Kerala Agricultural University. It is developed from the cross between NHTA 8 and Aruna (MO 8). It has got high milling quality in terms of Head Rice Recovery and better cooking quality compared to the popular variety Uma. It is moderately tolerant to sheath blight, sheath rot, BPH and gall midge. The variety was notified by the Government of India during 2021.","PeriodicalId":17022,"journal":{"name":"Journal of Rice Research and Developments","volume":"221 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135517297","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}
Bacterial Blight (BB) disease caused by Xanthomonas oryzae pv. oryzae (Xoo) is a major limiting factor amongst the diseases of rice in India. NLR34449 is a very popular high yielding variety. It is a popular variety not only in Andhra Pradesh but also in the neighbouring states of South India, but highly susceptible to the bacterial blight disease. A total of 802 BC1 F2 plants derived from the cross NLR 34449 and ISM were phenotypically screened for bacterial blight resistance, 687 were found to be resistant to BB. Genotyping of these plants revealed ten homozygous positive plants for all the three target BB genes viz., Xa21, xa13 and xa5. They were further assessed for key agro-morphological traits. viz., Days to 50% flowering, plant height, number of panicles per plant, thousand grain weight and grain yield per plant. Almost all the traits exhibited variation for key agronomic traits and among them, five plants were found to be performing well not only for bacterial blight resistance but also found to be superior in terms of key agronomic traits like thousand grain weight and single plant yield and flowered earlier than the parents as well. These identified plants will be advanced for further evaluation.
{"title":"Molecular Screening and Agronomic Trait Characterization of NLR 34449 X ISM Derived Population for their resistance against Bacterial Blight Disease","authors":"Aleena D, Padma V, Ratna Babu V`, Lal Ahamed Mohammad -, Ramana JV, Vijaya Gopal -, Sandhya Munagapati, Sundaram RM","doi":"10.58297/isrv4770","DOIUrl":"https://doi.org/10.58297/isrv4770","url":null,"abstract":"Bacterial Blight (BB) disease caused by Xanthomonas oryzae pv. oryzae (Xoo) is a major limiting factor amongst the diseases of rice in India. NLR34449 is a very popular high yielding variety. It is a popular variety not only in Andhra Pradesh but also in the neighbouring states of South India, but highly susceptible to the bacterial blight disease. A total of 802 BC1 F2 plants derived from the cross NLR 34449 and ISM were phenotypically screened for bacterial blight resistance, 687 were found to be resistant to BB. Genotyping of these plants revealed ten homozygous positive plants for all the three target BB genes viz., Xa21, xa13 and xa5. They were further assessed for key agro-morphological traits. viz., Days to 50% flowering, plant height, number of panicles per plant, thousand grain weight and grain yield per plant. Almost all the traits exhibited variation for key agronomic traits and among them, five plants were found to be performing well not only for bacterial blight resistance but also found to be superior in terms of key agronomic traits like thousand grain weight and single plant yield and flowered earlier than the parents as well. These identified plants will be advanced for further evaluation.","PeriodicalId":17022,"journal":{"name":"Journal of Rice Research and Developments","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135972369","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}
Plant growth is highly influenced by the nutrient supply from soil and the external application of fertilizers. Plants must receive essential nutrients like N, P, K, S and micronutrients for optimum plant growth and development. In current agricultural practices, especially, in cereal-based cropping systems, the soil nutrient balance like potassium and zinc are disturbed to the negative side due to intensive exploitation of native soil nutrients and low external input application. Employing 4R nutrient stewardship (right time, right dose, right source and right method) in soil nutrient management will ensure higher yield, nutrient uptake, nutrient use efficiency, increase in farm income, and minimal damage to the environment through its demand-specific supplement and management. Equilibrium between different pools of nutrients is the major driving factor for nutrient supply and demand in the soil which can be compensated by the external supply of nutrients through the 4R approach. Adoption of 4R stewardship in rice-based systems will ensure the attainment of maximum yield and nutrient use efficiency provided all other growth factors are in optimal supply and will assist in attaining self-sufficiency in rice production.
{"title":"Potassium and Zinc Management in Rice (Oryza sativa L.) based on 4R concept - A Review","authors":"Surekha K, Gobinath R, Manasa V, Vijayakumar S, Brajendra -","doi":"10.58297/zjgy4649","DOIUrl":"https://doi.org/10.58297/zjgy4649","url":null,"abstract":"Plant growth is highly influenced by the nutrient supply from soil and the external application of fertilizers. Plants must receive essential nutrients like N, P, K, S and micronutrients for optimum plant growth and development. In current agricultural practices, especially, in cereal-based cropping systems, the soil nutrient balance like potassium and zinc are disturbed to the negative side due to intensive exploitation of native soil nutrients and low external input application. Employing 4R nutrient stewardship (right time, right dose, right source and right method) in soil nutrient management will ensure higher yield, nutrient uptake, nutrient use efficiency, increase in farm income, and minimal damage to the environment through its demand-specific supplement and management. Equilibrium between different pools of nutrients is the major driving factor for nutrient supply and demand in the soil which can be compensated by the external supply of nutrients through the 4R approach. Adoption of 4R stewardship in rice-based systems will ensure the attainment of maximum yield and nutrient use efficiency provided all other growth factors are in optimal supply and will assist in attaining self-sufficiency in rice production.","PeriodicalId":17022,"journal":{"name":"Journal of Rice Research and Developments","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135648401","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}
Salicylic acid (SA), a signaling molecule is known to affect various physiological processes like growth and development, photosynthesis, absorption and translocation of assimilates etc. Therefore, an experiment was conducted to study the effect of salicylic acid on assimilate partitioning and yield of rice. The experiment comprised of 14 treatments replicated thrice in Randomized Complete Block Design (RCBD). Foliar application of SA @ 50, 100, 150 & 200 µg ml-1 was done at boot leaf stage (BL), one week after boot leaf stage (1WABL) and at BL + 1WABL. Treatment of water spray and unsprayed (control) were also included. Findings reveal that application of 100 µg ml-1 SA at BL + 1WABL resulted in the highest grain yield, which was statistically similar to 150 µg ml-1 SA at BL + 1WABL. The higher productivity under respective treatments can be ascribed to higher crop growth rate, relative growth rate, net assimilation rate and improvement in partitioning of dry matter from vegetative parts to grains due to improved vascularization. Also there was improvement in photosynthetic efficiency in terms of total chlorophyll content; carotenoid content and Hill reaction activity under SA treated plots. Thus, the productivity enhancement in rice can be achieved through 2 foliar sprays of salicylic acid @ 100 µg ml-1 each at boot leaf stage + one week after boot leaf stage.
{"title":"Assimilate Partitioning and Photosynthetic Parameters of Rice (Oryza sativa L.) in Response to Salicylic Acid Application","authors":"Manjinder Singh, Navita Ghai, Buta Singh Dhillon","doi":"10.58297/zxgp3882","DOIUrl":"https://doi.org/10.58297/zxgp3882","url":null,"abstract":"Salicylic acid (SA), a signaling molecule is known to affect various physiological processes like growth and development, photosynthesis, absorption and translocation of assimilates etc. Therefore, an experiment was conducted to study the effect of salicylic acid on assimilate partitioning and yield of rice. The experiment comprised of 14 treatments replicated thrice in Randomized Complete Block Design (RCBD). Foliar application of SA @ 50, 100, 150 & 200 µg ml-1 was done at boot leaf stage (BL), one week after boot leaf stage (1WABL) and at BL + 1WABL. Treatment of water spray and unsprayed (control) were also included. Findings reveal that application of 100 µg ml-1 SA at BL + 1WABL resulted in the highest grain yield, which was statistically similar to 150 µg ml-1 SA at BL + 1WABL. The higher productivity under respective treatments can be ascribed to higher crop growth rate, relative growth rate, net assimilation rate and improvement in partitioning of dry matter from vegetative parts to grains due to improved vascularization. Also there was improvement in photosynthetic efficiency in terms of total chlorophyll content; carotenoid content and Hill reaction activity under SA treated plots. Thus, the productivity enhancement in rice can be achieved through 2 foliar sprays of salicylic acid @ 100 µg ml-1 each at boot leaf stage + one week after boot leaf stage.","PeriodicalId":17022,"journal":{"name":"Journal of Rice Research and Developments","volume":"122 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135340054","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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