Moura L M, Carneiro P C S, Vale N M, Barili L D, Silva L C, Carneiro J E S, Cruz C D
Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, Brasil
Departamento de Biologia Geral, Universidade Federal de Viçosa, Viçosa, Brasil.
Genet Mol Res. 2016 Aug 29;15(3):gmr8574. doi: 10.4238/gmr.15038574.
In this study, conducted in two different seasons, we aimed to choose parents to obtain promising segregating populations for the extraction of black bean (Phaseolus vulgaris L.) lines that are superior in terms of disease resistance, plant architecture, and grain yield. Twelve parents were arranged in two groups to compose a partial diallel in a 5 x 7 scheme. Group 1 was composed of parents with black grains and erect plant architecture, while group 2 was composed of parents that had carioca grains and were resistant to the main fungal diseases that occur in the common bean. The following traits were evaluated: severity of angular leaf spot (ALS), plant architecture (PAG), and grain yield (YIELD). The data were analyzed according to a partial diallel model using parents and F hybrids. In the genetic control of ALS and PAG, additive effects were predominant, while for YIELD, additive effects were predominant in one season and dominance effects were in another season, because it is a more complex trait than ALS and PAG. For YIELD, we observed an interaction between general combining ability and specific combining ability between seasons. The genes that control ALS, PAG, and YIELD were in eight of the 12 parents evaluated in the diallel. The cultivar 'BRS Estilo' is suitable to use as a parent in common bean breeding in terms of ALS, PAG and YIELD. Recurrent selection is the most recommended option for simultaneously breeding for PAG, YIELD, and resistance to angular leaf spot in bean culture.
在这项于两个不同季节开展的研究中，我们旨在挑选亲本，以获得有前景的分离群体，用于培育在抗病性、植株形态和籽粒产量方面表现优异的黑豆（菜豆）品系。12个亲本被分成两组，按照5×7的设计构成一个部分双列杂交。第1组由黑粒且植株形态直立的亲本组成，而第2组由具有卡里约卡粒且对菜豆中主要真菌病害具有抗性的亲本组成。对以下性状进行了评估：角斑病严重程度（ALS）、植株形态（PAG）和籽粒产量（YIELD）。使用亲本和F代杂种，根据部分双列杂交模型对数据进行了分析。在ALS和PAG的遗传控制中，加性效应占主导，而对于YIELD，在一个季节中加性效应占主导，在另一个季节中显性效应占主导，因为它是一个比ALS和PAG更复杂的性状。对于YIELD，我们观察到季节间一般配合力和特殊配合力之间存在相互作用。在双列杂交评估的12个亲本中，有8个亲本含有控制ALS、PAG和YIELD的基因。就ALS、PAG和YIELD而言，品种‘BRS Estilo’适合用作菜豆育种的亲本。轮回选择是菜豆栽培中同时针对PAG、YIELD和角斑病抗性进行育种的最推荐方法。
