Tight Linkage of Purple Pod Character and the Complex C Locus in Common Bean

• Published in: The Journal of heredity 1994-07, Vol.85 (4), p.288-290
• Main Author: BASSETT, M. J
• Format: Article
• Language: English
• Subjects: Beans; Biological and medical sciences; Classical genetics, quantitative genetics, hybrids; Fundamental and applied biological sciences. Psychology; Genes; Genetics of eukaryotes. Biological and molecular evolution; Heredity; Phaseolus vulgaris; Plant reproduction; Pteridophyta, spermatophyta; Vegetals
• ISSN: 0022-1503; 1465-7333; 1471-8505
• DOI: 10.1093/oxfordjournals.jhered.a111458

The inheritance of the purple pod character in common bean (Phaseolus vulgans L) was investigated By means of allelism tests it was demonstrated that the purple pod locus (Prp) was tightly linked to the complex C locus in two bean cultivars, Royal Burgundy with [c″ Prp′] and Preto 146 with [C Prp]. No crossover phenotypes were observed among 4,026 F2 progeny of crosses between parents with different alleles at both loci; hence, the bracket convention is used to indicate very close linkage. The new gene symbol Prp′ designates the purple pod allele that produces an intensification of purple color in nearly all plant parts, including flower buds, corolla, pods, stems, petioles, and, to a lesser extent, leaf lamina. The old gene symbols Ro and prph2 were found to be synonyms for Prp, and the more informative symbolic expression [c″ Prp′] is proposed to replace the c symbol of Nakayama. Similarly, the green pods with purple stripes of Contender and c BC2 5-593 were given the new symbol [c′ prp″].