Diallelic Analysis of Endogamic Maize Lines with Emphasis on Agronomic Traits of Tassel in Different Environments

Autor: Ivan Ricardo Carvalho, Mauricio Ferrari, L.C. da Maia, D. Barreta, A.J. de Pelegrin, V. J. Szareski, V. Q. de Souza, Valmor Antonio Konflanz, A. C. de Oliveira, Maicon Nardino
Rok vydání: 2019
Předmět:
Zdroj: Journal of Crop Science and Biotechnology. 22:101-111
ISSN: 2005-8276
1975-9479
DOI: 10.1007/s12892-018-0267-0
Popis: In maize breeding, diallel crosses are commonly used to identify superior combinations. This methodology aims to estimate the genotypes combining ability. The objective of this study was to quantify the general and specific combining ability effects, as well as the reciprocal effect of 10 elite endogamic lines of maize. A total of 90 experimental hybrid combinations were obtained from diallel crosses, which were evaluated in three growing environments: Pato Branco-PR, Campos Novos-SC, and Frederico Westphalen-RS in the 2012/2013 growing season. The GCA indicates that the parents 7 and 10 are promising for the reduction of plant height, length, and number of tassel ramifications. The parent 5 promotes reduction of plant height and number of tassel ramifications. The parent 6 presents favorable estimates for reducing the length and number of tassel ramifications. The parents that are better combined with others according to GCA for grain yield are 2, 5, 6, and 7. The SCA indicates that hybridization between the parents 2 × 7, 5 × 9, 7 × 8, 2 × 9, 4 × 5, 1 × 5, 5 × 8, and 2 × 8 increases grain yield in the environments of study. Hybrids from the cross 5 × 10 were promising because they presented negative SCA values for plant height reduction. The hybrid combination 1 × 10 presents an estimate for tassel length reduction. The hybrids 5 × 10 and 4 × 6 are the most promising for reducing the number of tassel ramifications.
Databáze: OpenAIRE
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