Mate choice for major histocompatibility complex(MHC)complementarity in the Yellow-rumped Flycatcher(Ficedula zanthopygia)  

作　　者：Mingju E Xiaolei Song Liufang Wang Yimo Yang Xianxiu Wei Jiangping Yu Ye Gong Haitao Wang 

机构地区：[1]School of Life Sciences,Changchun Normal University,Changchun 130032,China [2]Jilin Engineering Laboratory for Avian Ecology and Conservation Genetics,School of Life Sciences,Northeast Normal University,Changchun 130024,China [3]Shenyang No.37 High School,Shenyang 110000,China [4]Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization,School of Life Sciences,Northeast Normal University,Changchun 130024,China [5]Ministry of Education Key Laboratory of Vegetation Ecology,School of Life Sciences,Northeast Normal University,Changchun 130024,China

出　　处：《Avian Research》2021年第2期218-226,共9页鸟类学研究（英文版）

基　　金：The study was financed by the National Natural Science Foundation of China(No.31801976 to ME and No.20111938 to HW);the University Student Innovation and Entrepreneurship Training Program of Jilin Province(No.202010205057 to ME);the Natural Science Foundation of Changchun Normal University.

摘　　要：Background:Genes of the major histocompatibility complex(MHC)are an important component of the vertebrate immune system and play a significant role in mate choice in animal populations.However,the MHC genetic targets of female mate choice have not been clearly identified,and whether female mate choice is based on neutral genetic characteristics remains an open question.Here,we focus on the effects of morphological traits and genetic similarity among individuals in MHC class IIB(MHC IIB)exon 2 on mating in a sexually dimorphic songbird that exhibits social monogamy with extra-pair paternity(EPP).Methods:We sequenced 64 parent-offspring triads sampled over a 3-year period using two MHC class II loci to detect disassortative mating in the Yellow-rumped Flycatcher(Ficedula zanthopygia).Results:We found that MHC similarity in social pairs was lower than that in random pairs.Extra-pair mate choice according to MHC IIB was observed,in which females’extra-pair mates had fewer MHC alleles than their within-pair mates,but there was no significant band-sharing between extra-pair sires and potential extra-pair mates.However,the interaction between the MHC diversity of females and that of the social males affected the occurrence of EPP.Conclusions:Our results support the“optimality hypothesis”of MHC-based social and extra-pair choice.Female choice probably maintains a certain level of MHC diversity in offspring in the Yellow-rumped Flycatcher.

关 键 词：Extra-pair paternity Mate choice Optimality hypothesis Yellow-rumped Flycatcher 

分 类 号：Q958[生物学—动物学]