White seed color in common bean (Phaseolus vulgaris) results from convergent evolution in the P (pigment) gene

Citations Over TimeTop 1% of 2018 papers

Abstract

The presence of seed color in common bean (Phaseolus vulgaris) requires the dominant-acting P (pigment) gene, and white seed is a recessive phenotype in all domesticated races of the species. P was classically associated with seed size, thus describing it as the first genetic marker for a quantitative trait. The molecular structure of P was characterized to understand the selection of white seeds during bean diversification and the relationship of P to seed weight. P was identified by homology searches, a genome-wide association study (GWAS) and gene remodeling, and confirmed by gene silencing. Allelic variation was assessed by a combination of resequencing and marker development, and the relationship between P and seed weight was assessed by a GWAS study. P is a member of clade B of subclass IIIf of plant basic helix-loop-helix (bHLH) proteins. Ten race-specific P alleles conditioned the white seed phenotype, and each causative mutation affected at least one bHLH domain required for color expression. GWAS analysis confirmed the classic association of P with seed weight. In common bean, white seeds are the result of convergent evolution and, among plant species, orthologous convergence on a single transcription factor gene was observed.

Related Papers

• → Two endornaviruses show differential infection patterns between gene pools of Phaseolus vulgaris(2015)29 cited
• Genetic resources of Phaseolus beans : their maintenance, domestication, evolution, and utilization(1988)
• → The Bean Weevil Populations from the Acanthoscelides Obtectus Say. Group Living on Wild or Subspontaneous Phaseolus Vulgaris L. and Phaseolus Coccineus L. and on Phaseolus Vulgaris L. Cultivated in the Tepoztlan Region State of Morelos — Mexico(1981)21 cited
• → DEVELOPMENT OF WOUND TUMORS BY DIFFERENT VARIETIES AND LINES OF THE COMMON BEAN (PHASEOLUS VULGARIS L.)(1970)1 cited
• → Phaseolus vulgaris L. Phaseolus sativus Royle Fabaceae(2020)