AssociaÃÃo entre arquitetura da planta e a produtividade do feijoeiro do mesmo "pool" gÃnico. / Association between plant architecture and grains yield of common bean with the same gene pool.
AUTOR(ES)
Camila Andrade Silva
DATA DE PUBLICAÇÃO
2009
RESUMO
The objective of this study was to verify if progenies with erect plant architecture display the same yield potential as progenies with no erect architecture, from the same segregating population. Crosses were made between the prostate cultivar BRSMG Majestoso with three erect cultivars (BRS Horizonte, BRS Supremo and BRS Valente), yielding three populations which were conducted in bulk up to the F5 generation. In this generation plants upright and non upright plants from each population were selected and evaluated in the experimental area of Department of Biology, Universidade Federal de Lavras. Evaluations were performed over three generations (F5: 6, F5: 7 and F5: 8), for plant architecture (1 = upright plants and 9 = prostrate plants), and grain yield. In the F5: 8 generation type of grain was also evaluated (1= desired standard commercial and 5= non-standard). In every generation a pooled analysis of variance, was performed considering the two experiments, using parents as the common treatment. The expected gain from selection (GS) for plant architecture was estimate for 10% selection of progenies more upright and correlated response (RC) in grain yield and the expected gain from selection for grain yield, for 10% selection of more productive progenies and correlated response in plant architecture. The GS for plant architecture varied from -18.00 to -37.74% and the RC in grain yield from -0.01 to -5.58%. But the GS for yield ranged from 0.06 to 17.62% and the RC in plant architecture from 5.30 to 15.48%. There was association between plant architecture and grain yield and between plant architecture and grain type, indicating that upright progenies from the same segregating population may have lower yield potential and carioca grain type below the desired pattern. However, it is possible to select progenies presenting the desired phenotypes for all three traits.
ASSUNTO(S)
gain from selection genetica quantitativa porte bean architecture ganhos com a seleÃÃo correlaÃÃo correlation feijÃo
ACESSO AO ARTIGO
http://bibtede.ufla.br/tede//tde_busca/arquivo.php?codArquivo=2295Documentos Relacionados
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