Allohexaploid pearl millet x elephantgrass population potential for a recurrent selection program.

AUTOR(ES)

REIS, M.C. dos

FONTE

Pesquisa Agropecuária Brasileira

DATA DE PUBLICAÇÃO

2011

RESUMO

The objective of this work was to evaluate the potential of allohexaploid pearl millet x elephantgrass (HGL) population for a recurrent selection program through open-pollinated progenies. Seventy-eight progenies, one representative sample of the population, and two commercial cultivars, Pioneiro and Paraíso, were evaluated in a 9x9 triple lattice design, in two sites. Plant height and dry matter yield were evaluated in three and four cuts, respectively. For plant height, the 17 best progenies were similar to both commercial controls, while for dry matter yield they were higher than 'Paraíso' and lower than 'Pioneiro'. The correlation between progenies and cuts indicated that the fourth cut represents the mean of all cuts, and the possibility of using early selection. Heritability estimates considering cuts and sites were 56.9% for plant height and 58.8% for dry matter yield, and the expected response to selection was 23.4% for dry matter yield and 18.1% for plant height. These results demonstrate the promising HGL population potential for a recurrent selection program.

ASSUNTO(S)

pennisetum heritability response to selection split-plot lattice design herdabilidade resposta à seleção látice de parcelas subdividas

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