Data/hora: 10/06/2024 15:20:42

Provedor de dados: | 1
País: | Brazil
Título: | Genetic progress, adaptability and stability of maize cultivars for value of cultivation and use trials
Autores: | Uate, Joaquim Vicente; Nunvuga, Joel Jorge; Silva, Carlos Pereira da; Guimarães, Lauro Jose Moreira; Pinho, Renzo Garcia Von; Balestre, Marcio.
Data: | 2019-05-24
Ano: | 2019
Palavras-chave: | Mixed model; Genetic gain; Biplot.
Resumo: | Maize breeding programs conduct multi-environment trials every year to assess the performance of new cultivars in pre-releasing tests. The data are combined across sites and seasons to perform a joint analysis in order to obtain information that will help breeders to select the best cultivars for different environments. Beyond this, it is essential to understand the different factors that can hamper the selection and genetic progress (i.e., genetic variability, selection intensity and genotype-by-environment interactions). In this study, the genetic progress (GP) was estimated and the adaptability and stability of 81 maize genotypes were evaluated in a series of trials for the value of cultivation and use (VCU) between the 2010/11 and 2014/15 growing seasons. The genotypes were composed of open-pollinated varieties, topcross hybrids, intervarietal hybrids, and single, double and three-way cross hybrids and were assessed in 117 environments in the central region of Brazil, from which 22 presented environmental stresses. For grain yield, an annual GP of 331.5 kg ha-1 was observed, thus showing efficiency in the selection of superior cultivars. Additionally, it was observed that some low-cost seed cultivars showed yield potential, adaptability and stability estimates that were compatible with commercial hybrids, thus making them quite attractive for cultivation in environments with or without abiotic stresses.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês

Identificador:

http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42624

10.4025/actasciagron.v41i1.42624

Editor: | Universidade Estadual de Maringá

Relação:

http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42624/pdf

http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/downloadSuppFile/42624/18266

Formato: | application/pdf

Fonte:

Acta Scientiarum. Agronomy; v. 41 (2019): Publicação Contínua; e42624

Acta Scientiarum. Agronomy; v. 41 (2019): Publicação Contínua; e42624

1807-8621

1679-9275

Fonte:

Direitos autorais 2019 Acta Scientiarum. Agronomy

http://creativecommons.org/licenses/by/4.0