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Genetic parameters and selection indexes in F2 and F2:3 soybean populations
Agronomy Journal ( IF 2.1 ) Pub Date : 2021-04-17 , DOI: 10.1002/agj2.20692
Carolina Oliveira Silva 1 , Osvaldo Toshiyuki Hamawaki 1 , Ana Paula Oliveira Nogueira 2 , Myckell Ramos Campos de Almeida 1 , Douglas Goulart Castro 1 , Fábio Serafim Marques 1 , Raphael Lemes Hamawaki 3 , Cristiane Divina Lemes Hamawaki 4 , Gabriela Marques Cardoso 1 , Victor Hugo Rodrigues Diniz 1
Affiliation  

The evaluation of genetic parameters in early generations select individuals in F2 and F2:3 and advancing only progenies with the potential to generate pure productive lines. The objectives of this study were to estimate genetic and phenotypic parameters in F2 and F2:3 populations derived from UFUS 7415 and TMG 7161 RR, evaluate different genotype selection strategies, and select progenies to improve agronomic traits. Populations in the F2 and F2:3 generations derived from a biparental cross between the parents UFUS 7415 and TMG 7161 RR were evaluated. The genetic parameters of 360 individuals in the F2 generation and 150 genotypes of each parent were evaluated. Heritability varied from 4.66% for the number of seeds per pod to 86.06% for plant height at flowering. The greatest selection gain was obtained for plant height at flowering (29.68%), related to grain production. In the F2:3 generation, 145 genotypes were evaluated and their parents, in a randomized block design with two replications. The correlations between characters and the genetic gains obtained by direct and indirect selection and based on the genotype–ideotype distance index and the Mulamba and Mock index of the sum of “ranks” were evaluated. With direct selection, selection gains ranged from –5.34 to 16.19%. The genotype–ideotype distance index showed a total selection gain of 40.49%, while the Mulamba and Mock index of the sum of ranks obtained a total gain of 39.35%. Twenty-three genotypes were selected for the characters evaluated with both indexes in the F3 generation.

中文翻译:

F2和F2:3大豆群体的遗传参数和选择指标

早期世代遗传参数的评估选择 F 2和 F 2:3 中的个体,并仅推进具有产生纯生产线潜力的后代。本研究的目的是估计来自 UFUS 7415 和 TMG 7161 RR 的F 2和 F 2:3种群的遗传和表型参数,评估不同的基因型选择策略,并选择后代以改善农艺性状。评估了从亲本 UFUS 7415 和 TMG 7161 RR 之间的双亲杂交衍生的 F 2和 F 2:3世代中的种群。F 2 360个个体的遗传参数评估了每个亲本的 150 个基因型。遗传力从每豆荚种子数的 4.66% 到开花时株高的 86.06% 不等。开花时的株高(29.68%)获得了最大的选择增益,这与谷物产量有关。在 F 2:3145 种基因型及其亲本,在随机区组设计中进行了两次重复评估。性状与通过直接和间接选择获得的遗传增益之间的相关性,以及基于基因型-基因型距离指数和“等级”总和的穆兰巴和模拟指数进行了评估。通过直接选择,选择增益范围从 –5.34 到 16.19%。基因型-意识形态距离指数显示总选择增益为 40.49%,而等级总和的 Mulamba 和 Mock 指数获得总增益为 39.35%。选择23个基因型用于F 3 代中用两个指标评估的性状。
更新日期:2021-04-17
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