Mapping one of the 2 genes controlling lemon ray flower color in sunflower (Helianthus annuus L.).
In an F2 population of 120 plants derived from a cross between 2 breeding lines with yellow ray flowers, we observed 111 plants with yellow-colored and 9 plants with lemon-colored ray flowers. The segregation pattern fits a 15:1 (chi2(15:1) = 0.32, P > 0.5) ratio, suggesting that the lemon ray flower color is conditioned by 2 independent recessive genes that had been contributed individually by each of the parents. We sampled 111 plants from the 3 F(2:3) families displaying a 3 to 1 segregating ratio for genotyping with molecular markers. One of the genes, Yf(1), was mapped onto linkage group 11 of the public sunflower map. A targeted region amplified polymorphism marker (B26P17Trap13-68) had a genetic distance of 1.5 cM to Yf(1), and one simple sequence repeat marker (ORS733) and one expressed sequence tag (EST)-based marker (HT167) previously mapped to linkage group 11 were linked to Yf(1) with distances of 9.9 and 2.3 cM, respectively.
Yue
Bing
B
Department of Plant Sciences, North Dakota State University, Fargo, ND 58105, USA.
Vick
Brady A
BA
Yuan
Wenge
W
Hu
Jinguo
J
D002874:Chromosome Mapping; D032461:Chromosomes, Plant; D003116:Color; D003433:Crosses, Genetic; D035264:Flowers / Q000033:anatomy & histology / Q000235:genetics*; D017343:Genes, Plant; D006368:Helianthus / Q000033:anatomy & histology / Q000235:genetics*; D010858:Pigmentation / Q000235:genetics