Reciprocal recurrent selection for obtaining water-deficit tolerant maize progeny

Autor: Fernanda Vargas Valadares, Rafael Nunes de Almeida, Lázaro Renilton Emerick Silva, Geferson Rocha Santos, Raissa Olmo Lacerda Pirovani, José Dias de Souza Neto, Ana Paula Cândido Gabriel Berilli, Monique Moreira Moulin, Marcelo Vivas, Sávio da Silva Berilli, Messias Gonzaga Pereira
Jazyk: English<br />Portuguese
Rok vydání: 2021
Předmět:
Zdroj: Ciência Rural, Vol 52, Iss 5 (2021)
Druh dokumentu: article
ISSN: 1678-4596
0103-8478
DOI: 10.1590/0103-8478cr20210162
Popis: ABSTRACT: In view of the need to increase genetic variability to obtain materials with a significant capacity to drought tolerance, this study conducted a cycle of a reciprocal recurrent selection of full-sib families of maize. To this end, 64 full-sib families of maize were evaluated in two environments according to their morpho-agronomic data in a randomized block design with two replicates. It were analyzed of Male flowering (MF); Female flowering (FF); Flowering interval (IF); days for flowering (DF); Plant height (PH); Ear height (EH); number of plants at the Stand (NPS); Number of broken plant (NBrP); Number of bedded plants (NBeP); Strawing (St); Ear length (EL); Ear diameter (ED); Ear number (EN); Prolificacy (Pr); Number of diseased ears (NDE); Number of ears attacked by pests (NEP); Ear weight (EW); Yield (YIE) and Total Chlorophyll Index (TCI). The analysis of variance was performed by the F test at 5% significance level, and also the evaluation of genetic parameters. Regarding morpho-agronomic data, the analysis of variance and the analysis of genetic parameters showed that there was no interaction genotype x environment with regard to the genetic variability among the families under study. Lastly, the final selection of the superior genotypes was made on the basis of the ranking of the 40 most productive families, from which, combined with the molecular data, the 30 most productive, most drought-tolerant, and most genetically diverse ones were selected to compose the next cycle of recurrent maize selection aiming water-stress tolerance.
Databáze: Directory of Open Access Journals
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