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Journal of Heredity Advance Access originally published online on May 13, 2008
Journal of Heredity 2008 99(5):564-567; doi:10.1093/jhered/esn033
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© The American Genetic Association. 2008. All rights reserved. For permissions, please email: journals.permissions@oxfordjournals.org.

Brief Communications

Mapping One of the 2 Genes Controlling Lemon Ray Flower Color in Sunflower (Helianthus annuus L.)

Bing Yue, Brady A. Vick, Wenge Yuan, and Jinguo Hu

From the Department of Plant Sciences, North Dakota State University, Fargo, ND 58105 (Yue); the Northern Crop Science Laboratory, US Department of Agriculture–Agricultural Research Service, Fargo, ND 58105 (Vick and Hu); the Hubei Academy of Agricultural Sciences, Wuhan 430064, People's Republic of China (Yue); and the Langfang Academy of Agriculture and Forestry Sciences, Langfang 065000, People's Republic of China (Yuan)

Address correspondence to J. Hu at the address above, or e-mail: jinguo.hu{at}ars.usda.gov.

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 ({chi}2(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 F2:3 families displaying a 3 to 1 segregating ratio for genotyping with molecular markers. One of the genes, Yf1, 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 Yf1, 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 Yf1 with distances of 9.9 and 2.3 cM, respectively.

Corresponding Editor: John Stommel

Received December 10, 2007
Accepted February 18, 2008


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