Estimate of genetic parameters in Brachiaria decumbens hybrids
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Data
2016-01-01
Autores
Matias, Filipe Inácio [UNESP]
Lima Barrios, Sanzio Carvalho
Do Valle, Cacilda Borges
Mateus, Rogério Gonçalves
Martins, Lucas Bearari
Moro, Gustavo Vitti [UNESP]
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Resumo
The objective of this study was to estimate genetic parameters for agronomic traits and nutritional value in intraspecific hybrids of B. decumbens. For this, a population of 1,415 hybrids was evaluated in field plots at Embrapa Beef Cattle in Campo Grande/MS/Brazil, with seven clippings in order to estimate field green weight (FGW); total dry matter (TDM); speed of regrowth (SR); tiller regrowth density (TRD); regrowth ability (REG); crude protein (CP); in vitro organic matter digestibility (IVD); neutral detergent fiber (NDF) and lignin (LIG). The statistical analyses were carried out using the mixed models methods. Genetic variability for all traits assessed was detected, and estimates of individual heritability were of medium to high magnitude, indicating the possibility of gains with selection. Significant genetic correlations were observed between FGW and TDM (0.99), TDM and SR (0.81), TDM and IVD (-0.71), TDM and LIG (0.71), and CP and IVD (0.70).
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Palavras-chave
Heritability, Recurrent selection, Signalgrass, Urochloa decumbens
Como citar
Crop Breeding and Applied Biotechnology, v. 16, n. 2, p. 115-122, 2016.