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vol.16 número2Whisker-mediated transformation of peanut with chitinase gene enhances resistance to leaf spot diseaseEffect of recurrent selection on the variability of the UENF-14 popcorn population índice de autoresíndice de assuntospesquisa de artigos
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Crop Breeding and Applied Biotechnology

versão impressa ISSN 1518-7853versão On-line ISSN 1984-7033


MATIAS, Filipe Inácio et al. Estimate of genetic parameters in Brachiaria decumbens hybrids. Crop Breed. Appl. Biotechnol. [online]. 2016, vol.16, n.2, pp.115-122. ISSN 1518-7853.

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).

Palavras-chave : Urochloa decumbens; signalgrass; recurrent selection; heritability.

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