Título:	Genotypic stabilization of agronomic traits in Panicum maximum (Jacq.) hybrids.
Autoria:	BRAZ, T. G. dos S. FONSECA, D. M. da JANK, L. CRUZ, C. D. MARTUSCELLO, J. A.
Afiliação:	Thiago Gomes dos Santos Braz, Universidade Federal dos Vales do Jequitinhonha e Mucuri/Departamento de Zootecnia; Dilermando Miranda da Fonseca, Universidade Federal de Viçosa/Departamento de Zootecnia; LIANA JANK, CNPGC; Cosme Damião Cruz, Universidade Federal de Viçosa/Departamento de Zootecnia; Janaina Azevedo Martuscello, Universidade Federal de São João del-Rei/Departamento de Zootecnia.
Ano de publicação:	2015
Referência:	Revista Brasileira de Zootecnia, v. 44, n. 11, p. 377-383, 2015
Conteúdo:	The objective of this study was to evaluate the genotypic stability of agronomic traits in hybrids of Panicum maximum. Hybrids originating from the crosses between two sexual parents and cultivars Mombasa and Tanzania were evaluated in an incomplete-block design. Evaluated traits were total dry matter, leaf dry matter, stem dry matter, percentage of leaves, and leaf:stem ratio. These traits were evaluated in six harvests. Overall, higher repeatability was observed for the traits total dry matter and leaf dry matter, especially when harvests 4, 5, and 6, occurring in spring and summer, were evaluated. The leaf dry matter was the trait that provided the greatest repeatability and determination. The repeatability of stem dry matter, percentage of leaves, and leaf:stem ratio had a low magnitude, even when the coefficient was estimated based on the harvests of better stabilization for the other variables. The hybrids achieved genotypic stabilization in the harvests made in the second rainy season. Harvests made in the rainy season provide greater repeatability and determination, and the inclusion of the dry-season harvest is detrimental to the process of selection of low-repeatability traits such as percentage of leaves.
Thesagro:	Forragem
NAL Thesaurus:	Forage
Palavras-chave:	Coefficient of determination Repeated measures Selection efficiency Coeficiente de determinação Medidas repetidas Eficiência de seleção
Tipo do material:	Artigo de periódico
Acesso:	openAccess
Aparece nas coleções:	Artigo em periódico indexado (CNPGC)