Diallel analysis of the combining ability of soybean genotypes under low latitude Brazilian cerrado conditions

• Autor(a) principal: Colombo, Gustavo André
• Data de Publicação: 2018
• Outros Autores: Carvalho, Edmar Vinícius de, Daronch, Douglas José, Peluzio, Joenes Mucci
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Revista de Ciências Agrárias (Belém. Online)
• Texto Completo: https://ajaes.ufra.edu.br/index.php/ajaes/article/view/2696
• topic: Glycine max; Tocantins; Genetic improvement; Complete diallel; Glycine max; Melhoramento genético; Tocantins; Dialelo completo; Melhoramento genético

The parent selection for crossings is one of the most important steps in genetic improvement programs, in which the prediction of the genetic potential of hybrids allows the breeder to channel human and financial resources at higher populations. In this sense, the objective of this study was to estimate the general (GCA) and specific combining ability (SCA) of seven soybean genotypes, in two generations (F1 and F2), to indicate parents and hybrid combinations that are promising to achieve new favorable combinations. F1 hybrids, F2 populations and the parents were evaluated in the city of Gurupi, Tocantins, Brazil. F1 generation and its parents were evaluated in a greenhouse, and the F2 generation in the field. The measured parameters were: number of days to flowering and to maturity, number of seeds per pod, number of pods per plant, weight of one hundred seeds and grain yield per plant. For all attributes, a significant effect for SCA was detected. Diallel analysis results were in accordance in F1 and F2 generations. M-8360 and A-7002 parents gather alleles favorable to reduce the number of days to flowering and to maturity in soybean. Hybridization M-8360 × BRS Valiosa is promising to obtain early cycle soybean strains. M-8360 and M-8867 parents are promising for population improvement programs, and their hybrid is promising to obtain superior segregant populations.