In:
New Phytologist, Wiley, Vol. 219, No. 3 ( 2018-08), p. 1112-1123
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.
Type of Medium:
Online Resource
ISSN:
0028-646X
,
1469-8137
DOI:
10.1111/nph.2018.219.issue-3
Language:
English
Publisher:
Wiley
Publication Date:
2018
detail.hit.zdb_id:
208885-X
detail.hit.zdb_id:
1472194-6
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