Pub Date : 2003-06-30DOI: 10.12702/1984-7033.V03N02A04
Eduardo Rezende Galvão, Tuneo Sedyiama, C. Cruz, R. D. C. Teixeira
An adaptability and stability study by the traditional and Lin and Binns methods (1988) was carried out to assess the genotypic stem canker resistance of three backcross generations (BC4, BC5 and BC6) in three environments. The study consisted of genotype trials carried out in the towns of Florestal, Capinopolis and Rio Paranaiba, in Minas Gerais state during the 1997/98 growing season. The experiments assessed the recurrent (FT-Cristalina) and donor (Doko BC) parents and 13 derived lines, five from the BC6 generation (UFV95370A2156, UFV95-370A2142, UFV95-370A2133, UFV95-370A2121 and UFV95-370A2115); four from BC5 (UFV95-370A2022, UFV95-370A2021, UFV95-370A2020 and UFV95-370A2019); and four from BC4 (UFV95-370A667, UFV95-370A666, UFV95-370A65 and UFV95-370A661). The Lin and Binns (1988) method was more efficient in discriminating the genotypes. The UFV95-370A2021 line belonging to the BC5 generation showed the best genotypic performance among the studied genotypes, and also showed the second best yield mean in the experiments. The UFV95-370A665 line, belonging to the BC4 generation, had the poorest genotypic behavior and also presented the lowest mean yield in the experiments. As the backcross generation advanced, there was a simultaneous improvement in the genotypic performance of the individuals in these generations, most probably because of the greater recuperation of the recurrent parent in each generation. This suggests the need for at least five to six backcrosses to obtain genotypes as adapted as the recurrent parent.
采用传统方法和Lin and Binns(1988)方法对3个回交代(BC4、BC5和BC6)在3种环境下的茎溃疡病抗性基因型进行了适应性和稳定性研究。该研究包括1997/98年生长季节在米纳斯吉拉斯州的弗洛雷斯塔尔、卡皮诺波利斯和里奥巴拉奈巴镇进行的基因型试验。实验评估了复发(FT-Cristalina)和供体(Doko BC)亲本和13个衍生系，其中5个来自BC6代(UFV95370A2156、UFV95-370A2142、UFV95-370A2133、UFV95-370A2121和UFV95-370A2115);4个来自BC5 (UFV95-370A2022, UFV95-370A2021, UFV95-370A2020和UFV95-370A2019);4个来自BC4 (UFV95-370A667, UFV95-370A666, UFV95-370A65和UFV95-370A661)。Lin和Binns(1988)的方法在区分基因型方面效率更高。BC5代的UFV95-370A2021在所研究的基因型中表现出最好的基因型性能，同时在实验中也表现出第二好的产量平均值。UFV95-370A665系属于BC4代，在实验中基因型行为最差，平均产量也最低。随着回交世代的推进，这些世代中个体的基因型表现也同时得到改善，这很可能是由于每一代的回交亲本得到了更大的恢复。这表明需要至少五到六次回交才能获得与复发亲本一样适应的基因型。
{"title":"Adaptability and stability of soybean genotypes evaluated using three backcrosses generations: BC4, BC5 and BC6","authors":"Eduardo Rezende Galvão, Tuneo Sedyiama, C. Cruz, R. D. C. Teixeira","doi":"10.12702/1984-7033.V03N02A04","DOIUrl":"https://doi.org/10.12702/1984-7033.V03N02A04","url":null,"abstract":"An adaptability and stability study by the traditional and Lin and Binns methods (1988) was carried out to assess the genotypic stem canker resistance of three backcross generations (BC4, BC5 and BC6) in three environments. The study consisted of genotype trials carried out in the towns of Florestal, Capinopolis and Rio Paranaiba, in Minas Gerais state during the 1997/98 growing season. The experiments assessed the recurrent (FT-Cristalina) and donor (Doko BC) parents and 13 derived lines, five from the BC6 generation (UFV95370A2156, UFV95-370A2142, UFV95-370A2133, UFV95-370A2121 and UFV95-370A2115); four from BC5 (UFV95-370A2022, UFV95-370A2021, UFV95-370A2020 and UFV95-370A2019); and four from BC4 (UFV95-370A667, UFV95-370A666, UFV95-370A65 and UFV95-370A661). The Lin and Binns (1988) method was more efficient in discriminating the genotypes. The UFV95-370A2021 line belonging to the BC5 generation showed the best genotypic performance among the studied genotypes, and also showed the second best yield mean in the experiments. The UFV95-370A665 line, belonging to the BC4 generation, had the poorest genotypic behavior and also presented the lowest mean yield in the experiments. As the backcross generation advanced, there was a simultaneous improvement in the genotypic performance of the individuals in these generations, most probably because of the greater recuperation of the recurrent parent in each generation. This suggests the need for at least five to six backcrosses to obtain genotypes as adapted as the recurrent parent.","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"9 1","pages":"117-124"},"PeriodicalIF":1.5,"publicationDate":"2003-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74372386","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2003-06-30DOI: 10.12702/1984-7033.V03N02A08
Aparecido Lima da Silva, M. Rogalski, M. P. Guerra
Rootstocks for peach trees are obtained in Brazil from seeds without genetic uniformity or health guarantee. Micropropagation techniques supply genetically uniform shoots but the in vitro culture protocols must be optimized. Cytokinins are essential for breaking the apex dormancy and inducing auxiliary shoot proliferation that influence the success of in vitro multiplication. The objective of this study was to assess the effect of different cytokinins in vitro multiplication rate, and on the survival rate of apical and axyllary buds in the establishment of Prunus ‘Capdeboscq’ rootstocks. Apical and axyllary buds were inoculated in test tubes containing 10mL Lepoivre culture medium, supplemented with BAP (0.5 mg L -1 ). After two subcultures of the in vitro establishment process, 1-2 cm nodal segments were treated with kinetin, isopentenyladenine and BAP, at concentrations of 0.1; 0.5; 1.0 and 2.0 mg L -1 . At the in vitro establishment phase, stem tips presented greater survival, less contamination and no hyperhidricity. BAP gave the highest in vitro multiplication rate, with 25.9 shoots/explant at the 1.5 mg L -1 . The different cytokinins did not result in differences in shoot height. The best results for the number of shoots greater than 20 mm were obtained with BAP at 1.0 mg L -1 .
巴西桃树的砧木是由没有遗传一致性或健康保证的种子获得的。微繁技术提供遗传上均匀的芽，但离体培养方案必须优化。细胞分裂素是打破茎尖休眠和诱导辅助芽增殖的重要物质，影响离体增殖的成功与否。本研究旨在探讨不同细胞分裂素对山李砧木培养过程中根尖芽和腋芽成活率的影响。顶芽和腋芽接种于含有10mL Lepoivre培养基的试管中，并添加BAP (0.5 mg L -1)。体外培养2次后，分别用0.1浓度的动蛋白、异戊烯腺嘌呤和BAP处理1-2 cm的节段;0.5;1.0和2.0 mg L -1。在离体培养阶段，茎尖表现出更高的存活率，更少的污染和无多汗症。在1.5 mg L -1浓度下，BAP的体外增殖率最高，为25.9个芽/外植体。不同的细胞分裂素对茎高没有影响。BAP浓度为1.0 mg L -1时，芽数大于20 mm的效果最好。
{"title":"Effects of different cytokinins on in vitro multiplication of Prunus 'Capdeboscq' rootstocks","authors":"Aparecido Lima da Silva, M. Rogalski, M. P. Guerra","doi":"10.12702/1984-7033.V03N02A08","DOIUrl":"https://doi.org/10.12702/1984-7033.V03N02A08","url":null,"abstract":"Rootstocks for peach trees are obtained in Brazil from seeds without genetic uniformity or health guarantee. Micropropagation techniques supply genetically uniform shoots but the in vitro culture protocols must be optimized. Cytokinins are essential for breaking the apex dormancy and inducing auxiliary shoot proliferation that influence the success of in vitro multiplication. The objective of this study was to assess the effect of different cytokinins in vitro multiplication rate, and on the survival rate of apical and axyllary buds in the establishment of Prunus ‘Capdeboscq’ rootstocks. Apical and axyllary buds were inoculated in test tubes containing 10mL Lepoivre culture medium, supplemented with BAP (0.5 mg L -1 ). After two subcultures of the in vitro establishment process, 1-2 cm nodal segments were treated with kinetin, isopentenyladenine and BAP, at concentrations of 0.1; 0.5; 1.0 and 2.0 mg L -1 . At the in vitro establishment phase, stem tips presented greater survival, less contamination and no hyperhidricity. BAP gave the highest in vitro multiplication rate, with 25.9 shoots/explant at the 1.5 mg L -1 . The different cytokinins did not result in differences in shoot height. The best results for the number of shoots greater than 20 mm were obtained with BAP at 1.0 mg L -1 .","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"110 1","pages":"149-156"},"PeriodicalIF":1.5,"publicationDate":"2003-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90676327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2003-06-30DOI: 10.12702/1984-7033.V03N02A10
P. Gonçalves, A. Martins, N. Bortoletto, O. C. Bataglia, M. Silva
Seven clones were studied, at four locations ,in replicated trials, in Sao Paulo State, Brazil, to determine the nature and extent of the genetic and environmental control of yield and girth traits in rubber tree [Hevea brasiliensis (Willd. ex Adr. de Juss.) Muell.-Arg.]. The clones represented a range of recommended material for planting, whereas the locations were selected to represent a range of rubber growing areas. Trees were studied for yield and girth over 11 years including three years after the initiation of tapping for latex: girth, vigor, and rubber yield. Girth analyses data showed a consistent increase in genotype component over the pre-tapping stage from 16 percent to 40 percent, with a corresponding decrease in the effect of the environment (71 percent to 38 percent). With respect to yield there was a similar change from environmental control to genetic control of the trait over the three years during which yield was monitored. Correlations between final tree size and earlier measurements indicate that different genes are involved in pre- and post-tapping growth. This implies that posttapping size measurements alone are useful as predictors of final size. There are non significant but negative correlations between vigour and rubber production. The implications of these findings to breeding and selection of rubber for these two production traits are discussed.
{"title":"Age trends in the genetic control of production traits in Hevea","authors":"P. Gonçalves, A. Martins, N. Bortoletto, O. C. Bataglia, M. Silva","doi":"10.12702/1984-7033.V03N02A10","DOIUrl":"https://doi.org/10.12702/1984-7033.V03N02A10","url":null,"abstract":"Seven clones were studied, at four locations ,in replicated trials, in Sao Paulo State, Brazil, to determine the nature and extent of the genetic and environmental control of yield and girth traits in rubber tree [Hevea brasiliensis (Willd. ex Adr. de Juss.) Muell.-Arg.]. The clones represented a range of recommended material for planting, whereas the locations were selected to represent a range of rubber growing areas. Trees were studied for yield and girth over 11 years including three years after the initiation of tapping for latex: girth, vigor, and rubber yield. Girth analyses data showed a consistent increase in genotype component over the pre-tapping stage from 16 percent to 40 percent, with a corresponding decrease in the effect of the environment (71 percent to 38 percent). With respect to yield there was a similar change from environmental control to genetic control of the trait over the three years during which yield was monitored. Correlations between final tree size and earlier measurements indicate that different genes are involved in pre- and post-tapping growth. This implies that posttapping size measurements alone are useful as predictors of final size. There are non significant but negative correlations between vigour and rubber production. The implications of these findings to breeding and selection of rubber for these two production traits are discussed.","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"8 1","pages":"163-172"},"PeriodicalIF":1.5,"publicationDate":"2003-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83362161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2003-06-30DOI: 10.12702/1984-7033.V03N02A05
Agnelo de Souza, C. Arias, M. F. Oliveira, B. Castiglioni
Boron deficiency is common in Brazilian soils specially under Savanna conditions. Sunflower crop is very demanding as to boron supply, showing low tolerance to its deficiency. This research was done to screen sunflower cultivars for high boron utilization efficiency based on relative plant reaction in complete (0.15 mg B L -1 ) and deficient (0.00625 mg B L -1 ) nutrient solution. Twenty-two cultivars were evaluated in three independent assays, according to a randomized complete block design with six replicates. Root growth, plant height, leaf length, fresh root weight, fresh canopy weight, and symptoms of boron deficiency were evaluated. A criteria of efficiency and responsiveness was established. The selection procedure was efficient for root and canopy fresh weights, plant height and root growth, and allowed the selection of superior sunflower genotypes such as the AS 238 and AS 243 cultivars.
硼缺乏在巴西土壤中很常见，特别是在热带草原条件下。向日葵作物对硼的要求很高，对缺硼的耐受性较低。以向日葵为研究对象，通过对全营养液(0.15 mg B L -1)和缺营养液(0.00625 mg B L -1)的相对植株反应，筛选硼利用效率高的向日葵品种。采用6个重复的随机完全区组设计，通过3个独立试验对22个品种进行评价。评估了根系生长、株高、叶长、鲜根重、鲜冠重和缺硼症状。制定了效率和反应能力的标准。该方法在根、冠层鲜重、株高和根系生长等方面均具有较好的选育效果，可选育出as238和as243等优良向日葵品种。
{"title":"Selection of sunflower cultivars for boron efficiency using nutrient solution","authors":"Agnelo de Souza, C. Arias, M. F. Oliveira, B. Castiglioni","doi":"10.12702/1984-7033.V03N02A05","DOIUrl":"https://doi.org/10.12702/1984-7033.V03N02A05","url":null,"abstract":"Boron deficiency is common in Brazilian soils specially under Savanna conditions. Sunflower crop is very demanding as to boron supply, showing low tolerance to its deficiency. This research was done to screen sunflower cultivars for high boron utilization efficiency based on relative plant reaction in complete (0.15 mg B L -1 ) and deficient (0.00625 mg B L -1 ) nutrient solution. Twenty-two cultivars were evaluated in three independent assays, according to a randomized complete block design with six replicates. Root growth, plant height, leaf length, fresh root weight, fresh canopy weight, and symptoms of boron deficiency were evaluated. A criteria of efficiency and responsiveness was established. The selection procedure was efficient for root and canopy fresh weights, plant height and root growth, and allowed the selection of superior sunflower genotypes such as the AS 238 and AS 243 cultivars.","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"1 1","pages":"125-132"},"PeriodicalIF":1.5,"publicationDate":"2003-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82203322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2003-06-30DOI: 10.12702/1984-7033.V03N02A03
R. Backes, M. Reis, C. Cruz, T. Sediyama, C. Sediyama
The objectives of the study were to analyze correlation among some important traits for breeding and assess three family selection strategies in soybean populations. Five soybean populations were assessed, three in the F 6 generation and two in the F 5 generation in Vicosa, MG, in the 1997/98 growing season. The experiment involved non replicated families inserted with replicated controls to allow estimation of the environmental component associated to the phenotypic variance of the studied populations. This arrangement allows the estimation of genetic parameters. The estimates of genetic correlation showed that the number of pods per plant is a good indicator of grain yield. The estimates of the gains from simulation of the three selection strategies showed that the direct selection on yield strategy resulted in greatest gains for the same trait but indirect selection via number of pods per plant resulted in gains close to those of direct selection. Selection based on the Pesek and Baker index enabled grain yield gains and simultaneous reduction in the cycle and plant height, despite the positive correlation of these two traits with grain yield.
{"title":"Correlation estimates and assessment of selection strategies in five soybean populations","authors":"R. Backes, M. Reis, C. Cruz, T. Sediyama, C. Sediyama","doi":"10.12702/1984-7033.V03N02A03","DOIUrl":"https://doi.org/10.12702/1984-7033.V03N02A03","url":null,"abstract":"The objectives of the study were to analyze correlation among some important traits for breeding and assess three family selection strategies in soybean populations. Five soybean populations were assessed, three in the F 6 generation and two in the F 5 generation in Vicosa, MG, in the 1997/98 growing season. The experiment involved non replicated families inserted with replicated controls to allow estimation of the environmental component associated to the phenotypic variance of the studied populations. This arrangement allows the estimation of genetic parameters. The estimates of genetic correlation showed that the number of pods per plant is a good indicator of grain yield. The estimates of the gains from simulation of the three selection strategies showed that the direct selection on yield strategy resulted in greatest gains for the same trait but indirect selection via number of pods per plant resulted in gains close to those of direct selection. Selection based on the Pesek and Baker index enabled grain yield gains and simultaneous reduction in the cycle and plant height, despite the positive correlation of these two traits with grain yield.","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"229 1","pages":"107-116"},"PeriodicalIF":1.5,"publicationDate":"2003-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77559899","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2003-06-30DOI: 10.12702/1984-7033.V03N02A11
C. Riede, L. Campos, Maria Brígida, Santos Scholz, P. S. Shioga
The wheat cultivar IPR 87, developed by IAPAR, presents as important traits, good yield potential, mediumhard and red color kernels. It is moderately resistant to lodging, and moderately resistant/moderately susceptible to sprouting. It presented moderately susceptibility to leaf rust, wheat blast, bydv, and wmv. The quality parameters indicated overall intermediate gluten strength, given by the alveographic W value of 170.10 -4 J, and Hagberg Falling Number of 327 s, which indicates good quality for biscuits and cake industry. Bread making can be done by blending IPR 87 flour with another stronger wheat flour. The mean grain yield was 4230 kg/ha in the North and Center-West regions of Parana State.
{"title":"IPR 87 - Bread wheat cultivar","authors":"C. Riede, L. Campos, Maria Brígida, Santos Scholz, P. S. Shioga","doi":"10.12702/1984-7033.V03N02A11","DOIUrl":"https://doi.org/10.12702/1984-7033.V03N02A11","url":null,"abstract":"The wheat cultivar IPR 87, developed by IAPAR, presents as important traits, good yield potential, mediumhard and red color kernels. It is moderately resistant to lodging, and moderately resistant/moderately susceptible to sprouting. It presented moderately susceptibility to leaf rust, wheat blast, bydv, and wmv. The quality parameters indicated overall intermediate gluten strength, given by the alveographic W value of 170.10 -4 J, and Hagberg Falling Number of 327 s, which indicates good quality for biscuits and cake industry. Bread making can be done by blending IPR 87 flour with another stronger wheat flour. The mean grain yield was 4230 kg/ha in the North and Center-West regions of Parana State.","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"10 1","pages":"173-176"},"PeriodicalIF":1.5,"publicationDate":"2003-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73317377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2003-06-30DOI: 10.12702/1984-7033.V03N02A01
C. Giaveno, J. Ferrero
Some temperate areas of the world behave as sub-tropical due to greenhouse effect and the global warming. Therefore, more temperate genotypes show an important decrease in yield and dry matter production as consequence of heat stress. The objective of this work was to evaluate the behavior of tropical maize genotypes under these climatic conditions and the feasibility of its utilization for silage production. Fifteen commercial hybrids were evaluated, five temperate and ten tropical, for fresh and dry matter production, grain yield, harvest index, plant and ear height, dry matter digestibility and crude protein in a field trail. Tropical genotypes showed a good behavior for all traits, inclusively those related with forage quality. Results attested that it is possible to increase silage production under these climatic conditions by introducing tropical genotypes into plant breeding programs.
{"title":"Introduction of tropical maize genotypes to increase silage production in the central area of Santa Fe, Argentina","authors":"C. Giaveno, J. Ferrero","doi":"10.12702/1984-7033.V03N02A01","DOIUrl":"https://doi.org/10.12702/1984-7033.V03N02A01","url":null,"abstract":"Some temperate areas of the world behave as sub-tropical due to greenhouse effect and the global warming. Therefore, more temperate genotypes show an important decrease in yield and dry matter production as consequence of heat stress. The objective of this work was to evaluate the behavior of tropical maize genotypes under these climatic conditions and the feasibility of its utilization for silage production. Fifteen commercial hybrids were evaluated, five temperate and ten tropical, for fresh and dry matter production, grain yield, harvest index, plant and ear height, dry matter digestibility and crude protein in a field trail. Tropical genotypes showed a good behavior for all traits, inclusively those related with forage quality. Results attested that it is possible to increase silage production under these climatic conditions by introducing tropical genotypes into plant breeding programs.","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"3 1","pages":"89-94"},"PeriodicalIF":1.5,"publicationDate":"2003-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80492420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2003-06-30DOI: 10.12702/1984-7033.V03N02A06
A. Viana, T. Nair, Santana Pereira, M. G. Pereira, Margarete, J. Maldonado
{"title":"Simple and canonic correlation between agronomical and fruit quality traits in yellow passion fruit (Passiflora edulis f. flavicarpa) populations","authors":"A. Viana, T. Nair, Santana Pereira, M. G. Pereira, Margarete, J. Maldonado","doi":"10.12702/1984-7033.V03N02A06","DOIUrl":"https://doi.org/10.12702/1984-7033.V03N02A06","url":null,"abstract":"","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"41 2","pages":"133-140"},"PeriodicalIF":1.5,"publicationDate":"2003-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72466113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2003-03-30DOI: 10.12702/1984-7033.V03N01A10
C. Guilherme, Portela de Carvalho, M. F. Oliveira, C. Arrabal, Vania Beatriz, Rodrigues Castiglioni, O. V. Vieira, J. Toledo
This study was carried out to categorize coefficients of variation (CV’s) associated with important traits of routine use in the sunflower breeding programs. Separate categories were obtained for the August/September and February/March sowings. Data were used from the intermediate and final sunflower experiments carried out by Embrapa Soybean and other collaborator institutions of the Network of Official Sunflower Trials. Taking into account the mean and the standard deviation of the CV’s obtained from the analyses of variance of the experiments, they were fitted into the low, medium, high and very high categories. An additional classification was made using the median and pseudo-sigma, in place of the mean and standard deviation, respectively. In this study it was ascertained that the CV’s categorization depended on the trait studied. Sowing date effects were more pronounced for seed and oil yield and plant height. For all assessed traits in February/March, the methodologies adopted were similar (regardless of the CV’s distribution) and satisfactory to assess the experimental accuracy of the trials. In the August/September trials there was good agreement between the results of the methodologies adopted and that of Gomes (1985) for seed and oil yield. For the other traits, the former methodologies were shown to be more adequate. The proposed CV’s categorizations for the sunflower traits use as maximum acceptable limits the values of 23.5% (August/September sowing) and 31.5% (February/ March sowing) for seed and oil yield, 6.0% for oil content (August/September and February/March) and plant height (August/September), 9.5% for plant height (February/March) and 4.5% for flowering and physiological maturity (August/September and February/March).
{"title":"Categorizing coefficients of variation in sunflower trials","authors":"C. Guilherme, Portela de Carvalho, M. F. Oliveira, C. Arrabal, Vania Beatriz, Rodrigues Castiglioni, O. V. Vieira, J. Toledo","doi":"10.12702/1984-7033.V03N01A10","DOIUrl":"https://doi.org/10.12702/1984-7033.V03N01A10","url":null,"abstract":"This study was carried out to categorize coefficients of variation (CV’s) associated with important traits of routine use in the sunflower breeding programs. Separate categories were obtained for the August/September and February/March sowings. Data were used from the intermediate and final sunflower experiments carried out by Embrapa Soybean and other collaborator institutions of the Network of Official Sunflower Trials. Taking into account the mean and the standard deviation of the CV’s obtained from the analyses of variance of the experiments, they were fitted into the low, medium, high and very high categories. An additional classification was made using the median and pseudo-sigma, in place of the mean and standard deviation, respectively. In this study it was ascertained that the CV’s categorization depended on the trait studied. Sowing date effects were more pronounced for seed and oil yield and plant height. For all assessed traits in February/March, the methodologies adopted were similar (regardless of the CV’s distribution) and satisfactory to assess the experimental accuracy of the trials. In the August/September trials there was good agreement between the results of the methodologies adopted and that of Gomes (1985) for seed and oil yield. For the other traits, the former methodologies were shown to be more adequate. The proposed CV’s categorizations for the sunflower traits use as maximum acceptable limits the values of 23.5% (August/September sowing) and 31.5% (February/ March sowing) for seed and oil yield, 6.0% for oil content (August/September and February/March) and plant height (August/September), 9.5% for plant height (February/March) and 4.5% for flowering and physiological maturity (August/September and February/March).","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"24 1","pages":"69-76"},"PeriodicalIF":1.5,"publicationDate":"2003-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88205863","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2003-03-30DOI: 10.12702/1984-7033.V03N01A12
A. Siviero, M. Cristofani, M. Machado, S. Moreira
The citrus vegetative propagation by stem cuttings depends on factors such as genetics, age, vigor, woodiness, growth regulators, environment and nutrition. Lemons (Citrus limon), acid limes (Citrus aurantifolia) and citrons (Citrus medica) root very easily. Plant cuttings from the sweet orange (Citrus sinensis), mandarins (Citrus reticulata) and Poncirus trifoliata are more difficult to root. The objective of this study was to detect quantitative trait loci linked to the rooting of citrus stem cuttings in F 1 hybrids obtained from a crossing between Citrus sunki x Poncirus trifoliata. The semi-woody cuttings were treated with 1 g/L indole-3-butyric acid for 10 minutes and cultivated in citrus substrate under a mist environment. QTLs were identified by the composite interval mapping strategy. Two QTLs were detected for the rooting trait in plant cutting, in the P. trifoliata map.
{"title":"QTL mapping associated with rooting stem cuttings from Citrus sunki vs. Poncirus trifoliata hybrids","authors":"A. Siviero, M. Cristofani, M. Machado, S. Moreira","doi":"10.12702/1984-7033.V03N01A12","DOIUrl":"https://doi.org/10.12702/1984-7033.V03N01A12","url":null,"abstract":"The citrus vegetative propagation by stem cuttings depends on factors such as genetics, age, vigor, woodiness, growth regulators, environment and nutrition. Lemons (Citrus limon), acid limes (Citrus aurantifolia) and citrons (Citrus medica) root very easily. Plant cuttings from the sweet orange (Citrus sinensis), mandarins (Citrus reticulata) and Poncirus trifoliata are more difficult to root. The objective of this study was to detect quantitative trait loci linked to the rooting of citrus stem cuttings in F 1 hybrids obtained from a crossing between Citrus sunki x Poncirus trifoliata. The semi-woody cuttings were treated with 1 g/L indole-3-butyric acid for 10 minutes and cultivated in citrus substrate under a mist environment. QTLs were identified by the composite interval mapping strategy. Two QTLs were detected for the rooting trait in plant cutting, in the P. trifoliata map.","PeriodicalId":49085,"journal":{"name":"Crop Breeding and Applied Biotechnology","volume":"57 1","pages":"83-88"},"PeriodicalIF":1.5,"publicationDate":"2003-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79446959","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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