Crop Breeding and Applied Biotechnology最新文献_第9页

Adaptability and stability of soybean genotypes evaluated using three backcrosses generations: BC4, BC5 and BC6 利用BC4、BC5和BC6三个回交代评价大豆基因型的适应性和稳定性

IF 1.5 4区农林科学

Crop Breeding and Applied Biotechnology Pub Date : 2003-06-30 DOI: 10.12702/1984-7033.V03N02A04

Eduardo Rezende Galvão, Tuneo Sedyiama, C. Cruz, R. D. C. Teixeira

{"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}

引用次数: 0

Effects of different cytokinins on in vitro multiplication of Prunus 'Capdeboscq' rootstocks 不同细胞分裂素对山李砧木离体增殖的影响

IF 1.5 4区农林科学

Crop Breeding and Applied Biotechnology Pub Date : 2003-06-30 DOI: 10.12702/1984-7033.V03N02A08

Aparecido Lima da Silva, M. Rogalski, M. P. Guerra

{"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}

引用次数: 11

Age trends in the genetic control of production traits in Hevea 橡胶树生产性状遗传控制的年龄趋势

IF 1.5 4区农林科学

Crop Breeding and Applied Biotechnology Pub Date : 2003-06-30 DOI: 10.12702/1984-7033.V03N02A10

P. Gonçalves, A. Martins, N. Bortoletto, O. C. Bataglia, M. Silva

{"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}

引用次数: 2

Selection of sunflower cultivars for boron efficiency using nutrient solution 营养液对向日葵品种硼效率的影响

IF 1.5 4区农林科学

Crop Breeding and Applied Biotechnology Pub Date : 2003-06-30 DOI: 10.12702/1984-7033.V03N02A05

Agnelo de Souza, C. Arias, M. F. Oliveira, B. Castiglioni

引用次数: 3

Correlation estimates and assessment of selection strategies in five soybean populations 5个大豆居群的相关性估计及选择策略评价

IF 1.5 4区农林科学

Crop Breeding and Applied Biotechnology Pub Date : 2003-06-30 DOI: 10.12702/1984-7033.V03N02A03

R. Backes, M. Reis, C. Cruz, T. Sediyama, C. Sediyama

{"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}

引用次数: 6

IPR 87 - Bread wheat cultivar IPR 87 -面包小麦品种

IF 1.5 4区农林科学

Crop Breeding and Applied Biotechnology Pub Date : 2003-06-30 DOI: 10.12702/1984-7033.V03N02A11

C. Riede, L. Campos, Maria Brígida, Santos Scholz, P. S. Shioga

引用次数: 0

Introduction of tropical maize genotypes to increase silage production in the central area of Santa Fe, Argentina 引进热带玉米基因型以提高阿根廷圣达菲中部地区的青贮产量

IF 1.5 4区农林科学

Crop Breeding and Applied Biotechnology Pub Date : 2003-06-30 DOI: 10.12702/1984-7033.V03N02A01

C. Giaveno, J. Ferrero

引用次数: 63

Simple and canonic correlation between agronomical and fruit quality traits in yellow passion fruit (Passiflora edulis f. flavicarpa) populations 黄色百香果(Passiflora edulis f. flavicarpa)居群农艺性状与果实品质性状的简单相关性和典型相关性

IF 1.5 4区农林科学

Crop Breeding and Applied Biotechnology Pub Date : 2003-06-30 DOI: 10.12702/1984-7033.V03N02A06

A. Viana, T. Nair, Santana Pereira, M. G. Pereira, Margarete, J. Maldonado

引用次数: 25

Categorizing coefficients of variation in sunflower trials 向日葵试验变异的分类系数

IF 1.5 4区农林科学

Crop Breeding and Applied Biotechnology Pub Date : 2003-03-30 DOI: 10.12702/1984-7033.V03N01A10

C. Guilherme, Portela de Carvalho, M. F. Oliveira, C. Arrabal, Vania Beatriz, Rodrigues Castiglioni, O. V. Vieira, J. Toledo

{"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}

引用次数: 10

QTL mapping associated with rooting stem cuttings from Citrus sunki vs. Poncirus trifoliata hybrids 柑桔与三叶Poncirus杂种生根插条的QTL定位

IF 1.5 4区农林科学

Crop Breeding and Applied Biotechnology Pub Date : 2003-03-30 DOI: 10.12702/1984-7033.V03N01A12

A. Siviero, M. Cristofani, M. Machado, S. Moreira

引用次数: 13