Genetic control of some traits related to the common bean seed coat color from the Rosinha x Esal 693

Abstract

The bean seed coat color, Phaseolus vulgaris L. (Leguminosae-Faboideae), is of great importance to the Brazilian consumer, therefore the objective of the research was to gain knowledge about the genetic control of some traits related to the seed coat color from the cross Rosinha x ESAL 693 (carioca type), and then to foresee the probability of obtaining desirable phenotypes from the segregating population. The general colors of the seeds, the presence or absence of corona and stripes on seeds from F₂ plants and F_2:3 families were evaluated. Only one gene is responsible for the presence or absence of stripes on the seed, and another for the light or dark general beige color of carioca type. For the presence or absence of corona and the rosinha color pattern two genes were identified in each case. Except for the presence of stripes, there are modifying genes involved in the control of the other traits. Considering all traits studied 11.26% of the F₂ plants had the ideal carioca type, and 12.82% presented the rosinha type