Crop Breeding and Applied Biotechnology (Jan 2008)

Genetic control of the number of days to flowering in common bean

  • Marcela Pedroso Mendes,
  • Flávia Barbosa Silva Botelho,
  • Magno Antonio Patto Ramalho,
  • Ângela de Fátima Barbosa Abreu,
  • Isabela Volpi Furtini

Journal volume & issue
Vol. 8, no. 4
pp. 279 – 282

Abstract

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The aim of this study was to investigate the genetic control of early flowering in common bean. Crosses weremade between the parents Pérola and BRS Radiante and between ESAL 506 and Preto 60 dias. The segregating generations,F3, F2BC11 and F2BC12 of each cross were evaluated in experiments with two replications. F3 plants of both crosses wererandomly taken, and F3:4 progenies evaluated for the trait number of days to flowering. There was good adjustment to theadditive-dominant model of both crosses. The dominance effect was lower than the additive effect in the trait control and, whenpresent, it reduced the number of days to flowering. The value of realized heritability (h2R) was similar in both crosses andlower than the h2 estimated for selection among F3:4 progenies. There were indications that aside from the environmental effecton the trait expression, the genotype-environment interaction was also significant.

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