Guilherme S R, Ramalho M A P, de F B Abreu A, Pereira L A
Departamento de Biologia, Universidade Federal de Lavras, Lavras, MG, Brasil
Departamento de Biologia, Universidade Federal de Lavras, Lavras, MG, Brasil.
Genet Mol Res. 2014 Dec 4;13(4):10349-58. doi: 10.4238/2014.December.4.30.
The number of pods per common bean plant is a primary component of grain yield, which depends on the number of flowers produced and on the flower set. Thus, a larger number of flowers per plant would increase yield. Lines with inflorescences that had a large number of flowers compared to common bean plants now under cultivation were identified. We analyzed the genetic control of this trait and its association with grain yield. The cultivar BRSMG Talismã was crossed with 2 lines, L.59583 and L.59692, which have a large number of flowers. The F1, F2, and F3 generations were obtained. These generations were assessed together with the parents in a randomized block experimental design with 2 replications. The traits assessed included length of inflorescence, number of pods per inflorescence, number of pods per plant, number of grains per plant, 100-grain weight, and grain yield per plant. Mean genetic components and variance were estimated. The traits length of inflorescence and number of pods per inflorescence exhibited genetic control with predominance that showed an additive effect. In the 2 crosses, genetic control of grain yield and of its primary components showed that the allelic interaction of dominance was high. The wide variability in the traits assessed may be used to increase yield of the common bean plant by increasing the number of flowers on the plant.
普通菜豆植株的豆荚数量是籽粒产量的主要组成部分，它取决于花朵的数量和坐果情况。因此，单株花朵数量增加会提高产量。我们鉴定出了一些品系，其花序上的花朵数量比目前种植的普通菜豆植株更多。我们分析了该性状的遗传控制及其与籽粒产量的关联。将品种BRSMG Talismã与两个品系L.59583和L.59692进行杂交，这两个品系花朵数量较多。获得了F1、F2和F3代。这些世代与亲本一起在随机区组试验设计中进行评估，重复2次。评估的性状包括花序长度、每花序豆荚数、单株豆荚数、单株籽粒数、百粒重和单株籽粒产量。估计了平均遗传成分和方差。花序长度和每花序豆荚数这两个性状表现出以加性效应为主的遗传控制。在这两个杂交组合中，籽粒产量及其主要组成部分的遗传控制表明显性等位基因相互作用较高。所评估性状的广泛变异性可用于通过增加植株上的花朵数量来提高普通菜豆植株的产量。
