Qualidade física do grão em populações de milho de alta qualidade protéica e seus cruzamentos
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Data
2007-12
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Editor
João Batista Duarte
Resumo
This study evaluated open pollinated populations of
high quality protein maize (QPM) and their crosses for weight
of grains, grain density, and coloration, determining the heterosis
and its components as subsidy for the improvement of these
populations. The analyses were carried out on 96 hybrids, derived
from eight populations of dent grains and thirteen of flint grains,
including their parents in a partial diallel intergroup design. A
chromatic scale used for classification of egg yolks was adapted
to determine grain colorations. The coefficients of variation for
the three variables were small, being 3.41% for the density, 6.23%
for weight of 100 grains, and 7.03% for grain coloration. Except
for specific heterosis of the real density, all effects analyzed
were significant. The real density means of dent and flint groups
were 1.27g mL-1 and 1.16g mL-1, with average heterosis of 3.53%.
The parents CMS 474 (29.92 g) and CMS 471 (34.28 g) outstood
for grain weight with larger means and heterosis of 3.61%. For
grain coloration, the mean of flint group was 11.77 points and of
the dent group 10.53 points, with average heterosis of 3.84%.
Parents ZQP 101 and ZQP 103 are recommended for the
formation of a composite of dent grains, and the genotypes CMS
458, CMS 472, CMS 453 and BR 473 as parental populations in
the formation of a composite of flint grains.
Descrição
Palavras-chave
Zea mays, Densidade do grão, Peso de grão, Coloração do grão, Grain density, Grain weight, Grain coloratio.
Citação
OLIVEIRA, Jaison Pereira de; CHAVES, Lázaro José; DUARTE, João Batista; BRASIL, Edward Madureira; RIBEIRO, Keyla de Oliveira. Qualidade física do grão em populações de milho de alta qualidade protéica e seus cruzamentos. Pesquisa Agropecuária Tropical, Goiânia, v. 37, n. 4, p. 233-241, out./dez. 2007. Disponível em: <https://www.revistas.ufg.br/pat/article/view/3082/3125>.