Genetic control of orange hilum corona of carioca beans (Phaseolus vulgaris)

Abstract

The purpose of this research was to elucidate the genetic control of orange corona color in carioca common beans (Phaseolus vulgaris). We made four crosses between carioca group cultivars that differed in respect to the presence or absence of an orange hilum corona color. The F 2 , F 3 , F 1 BC 11 , F 1 BC 21 , F 2 BC 11 and F 2 BC 21 phenotypic segregations were evaluated with a chi-square test which fitted with the hypothesis that one gene with a dominant allele is responsible for the orange corona color. All generations resulting from the four different crosses showed segregation patterns which agreed with the expected proportions. Our results show that the dominant G allele controls orange corona color in the carioca bean group.

Genetic analysis of seed morphological traits and its correlations with Grain yield in common bean

“…The large phenotypic variability present in common bean has usually been expressed in terms of size, shape, color and brightness. A expressive number of work related to the genetic control of the skin coloration of bean seeds are available in literature and a review of the genes studied until now had been published by Basset (2004) and Tomaz et al (2007). The comparison among the results obtained is difficult due to the different nomenclature utilized for genes and the different colorations related by the authors to a same color tone.…”

<b>Interrelationship between morphological, agronomic and molecular characteristics in the analysis of common bean genetic diversity

“…Hilum color is another important characteristic, particularly in Carioca cultivars, since these can exhibit a yellow or orange color indicating an undesirable phenotype, meaning breeders should select seeds without this trait (Tomaz, Moda-Cirino, Fonseca Junior, & Ruas, 2007).…”

Registration of ‘ND‐307’ Pinto Bean

“…In some other instances, a bright‐yellow corona can be a detrimental characteristic in some other regions and market classes as observed in carioca beans in Brazil, where consumers often associate the presence of the orange corona in the seeds with low cooking quality (Tomaz et al, 2007). Consequently, carioca beans with yellow corona have a lower market price and farmers avoid growing these seeds.…”