Martins E S, Pinto Júnior R A, Abreu A F B, Ramalho M A P
Departamento de Genética, Escola Superior de Agricultura "Luiz de Queiroz", , , Brasil
Departamento de Biologia, Universidade Federal de Lavras, Lavras, MG, Brasil.
Genet Mol Res. 2017 Sep 21;16(3):gmr-16-03-gmr.16039723. doi: 10.4238/gmr16039723.
This article aimed to study the genetic control of some flowers and pod set of common bean and to verify if its estimate varies with environmental conditions and gene pool. A complete diallel was used among six lines, but no reciprocal ones. The treatments were evaluated in three harvests/generations - F, F, and F - in 2015/2016, in a randomized complete block design with four replications. The plot consisted of 3 lines with 4 m. In the center line, a receptacle to collect the aborted flowers/pods was placed. The traits considered were the number of flowers/plant (N), the percentage of pod set (V), and the production of grain/plant (W). A joint diallel analysis was performed, and the correlations between N, V, and W were estimated. N was 31.9 on average, and V was 40.4%. The average of Mesoamerican parents, for N and V, was higher than for Andean. Specific combining ability explained most of the variation for N, evidencing predominance of dominance effect. For V, specific combining ability was slightly lower than general combining ability, indicating additive loci and also dominance effects. These two traits were very influenced by environment and should be considered a strategy for greater grain yield stability of common bean.
本文旨在研究菜豆某些花和结荚的遗传控制，并验证其估计值是否随环境条件和基因库而变化。在六个品系间进行了完全双列杂交，但未进行正反交。在2015/2016年的三个收获期/世代（F、F和F）进行处理评估，采用随机完全区组设计，重复四次。小区由3行组成，行长4米。在中间行放置一个容器以收集败育的花/荚。所考虑的性状包括每株花数（N）、结荚率（V）和每株籽粒产量（W）。进行了联合双列分析，并估计了N、V和W之间的相关性。N平均为31.9，V为40.4%。中美洲亲本的N和V平均值高于安第斯亲本。特殊配合力解释了N的大部分变异，表明显性效应占主导。对于V，特殊配合力略低于一般配合力，表明存在加性位点和显性效应。这两个性状受环境影响很大，应被视为提高菜豆籽粒产量稳定性的一种策略。
