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Selection of parents for low nitrogen stress through the combining ability of maize partially inbred lines Agronomy
Heinz, Rafael; Ribeiro, Larissa Pereira; Gonçalves, Manoel Carlos; Bhering, Leonardo Lopes; Teodoro, Paulo Eduardo.
The objective of this work was to estimate the general combining ability of partially inbred lines under high and low nitrogen (N) conditions and to select promising lines to obtain high yields for both conditions. Fifty-five partially inbred S1 progenies were evaluated using the top-cross method, where the lines were crossed with two testers. The 110 top-cross hybrids were evaluated for grain yield during the off-season of 2012 at two sites in the Brazilian Midwest. Partial diallel analysis was performed with the adjusted means of each of the individual analyses of the top crosses. The combining ability of partially inbred lines and testers as well as their interaction with N levels, was estimated for each site. The coefficient of concordance among 15...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Diallel; Hybrid combination; Top-cross; Zea mays L. diallel; Hybrid combination; Top-cross; Zea mays L..
Ano: 2019 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42705
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Heterotic parametrization for economically important traits in popcorn - DOI: 10.4025/actasciagron.v31i3.4689 Agronomy
Vieira, Rafael Augusto; UEM; Souza Neto, Israel Leite; UEM; Bignotto, Lucas Souto; UEM; Cruz, Cosme Damião; UFV; Amaral Júnior, Antonio Teixeira do; UENF; Scapim, Carlos Alberto; UEM.
Six popcorn varieties were crossed in a diallel mating scheme to obtain 15 F1 hybrids, with the purpose of analyzing the estimates of heterotic parametrization for agronomically important traits. The genitors and hybrids were evaluated in randomized block design with three replications in Viçosa and Visconde do Rio Branco, in Minas Gerais State, Brazil, in three growing seasons. Six traits were evaluated, including grain yield and popping expansion. There were highly significant effects for treatments, varieties and mean heterosis for plant and ear heights, and for the others traits the significance extended to all sources of variation. Amarela and Viçosa revealed superiority for grain yield in relation to performance per se, while Rosa Claro expressed the...
Palavras-chave: 5.01.00.00-9 Agronomia diallel; Heterosis; Popping expansion; Bidirectional dominance; Zea mays L. diallel; Heterosis; Popping expansion; Bidirectional dominance; Zea mays L..
Ano: 2009 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/4689
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