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Inheritance of a Variegated Testa Color in Peanuts 1
Author(s) -
Branch W. D.,
Hammons Ray O.
Publication year - 1980
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1980.0011183x002000050029x
Subject(s) - biology , variegation (histology) , locus (genetics) , cultivar , red color , botany , white (mutation) , genetic inheritance , genetics , horticulture , gene , physics , optics
Testa color in peanuts, Arachis hypogaea L., has a subjective value for market quality, and an understanding of testa color inheritance is prerequisite to breeding cultivars acceptable for marketing. The genetic relationship between two solid testa colors (pink and red) and their interaction with variegated (red/white) testa were investigated with progenies from intrasubspecific crosses involving nine parents. The variegation gene, V , was expressed as incompletely dominant to solid color and a 1:2:1 ratio was obtained from red ✕ red/white crosses. The pink ✕ red testa crosses gave the 1:2:1 ratio for the R 2 locus, In crosses of peanuts with pink ✕ red/white testa, the F 2 segregation fit the 1:2:1:2:4:2:1:2:1 phenotypic, also genotypic, ratio — the distribution expected from two independent loci with incomplete dominance for each gene pair. The nine genotypes were: R 2 R 2 vv , R 2 R 2 Vv , R 2 R 2 VV , R 2 r 2 vv , R 2 r 2 Vv , R 2 r 2 VV , r 2 r 2 vv , r 2 r 2 Vv , r 2 r 2 VV . Linkage was not detected between any of the testa colors investigated.