Cape Feather Coloration Signals Different Genotypes of the Most Polymorphic MHC Locus in Male Golden Pheasants (<i>Chrysolophus pictus</i>)
Hong-Yi Liu,
Ke He,
Yun-Fa Ge,
Qiu-Hong Wan,
Sheng-Guo Fang
Affiliations
Hong-Yi Liu
MOE Key Laboratory of Biosystems Homeostasis & Protection, State Conservation Centre for Gene Resources of Endangered Wildlife, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
Ke He
MOE Key Laboratory of Biosystems Homeostasis & Protection, State Conservation Centre for Gene Resources of Endangered Wildlife, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
Yun-Fa Ge
MOE Key Laboratory of Biosystems Homeostasis & Protection, State Conservation Centre for Gene Resources of Endangered Wildlife, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
Qiu-Hong Wan
MOE Key Laboratory of Biosystems Homeostasis & Protection, State Conservation Centre for Gene Resources of Endangered Wildlife, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
Sheng-Guo Fang
MOE Key Laboratory of Biosystems Homeostasis & Protection, State Conservation Centre for Gene Resources of Endangered Wildlife, College of Life Sciences, Zhejiang University, Hangzhou 310058, China
Ornamental feather coloration is usually a reflection of male quality and plays an important role during courtship, whereas the essence of male quality at the genetic level is not well understood. Major histocompatibility complex (MHC)-based mate choice has been observed in various vertebrates. Here, we investigated the relationship between the coloration of cape feathers and the MHC genotypes in golden pheasants (Chrysolophus pictus). We found that feather coloration differed sharply among different individuals (brightness: 1827.20 ± 759.43, chroma: 1241.90 ± 468.21, hue: 0.46 ± 0.06). Heterozygous individuals at the most polymorphic MHC locus (IA2) had brighter feathers than homozygous individuals (Z = −2.853, p = 0.004) and were more saturated in color (Z = −2.853, p = 0.004). However, feather coloration was not related to other MHC loci or to overall genetic heterozygosity (p > 0.050). Our study suggested that coloration of cape feathers might signal IA2 genotypes in golden pheasants.
