High level of extra-pair paternity in the socially monogamous Marsh Tits(Poecile palustris)  

作　　者：Juan Wang Yanhui Wei Lei Zhang Yiting Jiang Keke Li Dongmei Wan 

机构地区：[1]Laboratory of Animal Resource and Epidemic Disease Prevention,Department of Life Sciences,Liaoning University,Shenyang 110036,China

出　　处：《Avian Research》2021年第4期722-726,共5页鸟类学研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant No.31872231)to DW;the Youth Foundation of Liaoning University(Grant No.A251901012)to JW。

摘　　要：Background:Extra-pair copulation behavior has been widely studied among socially monogamous birds.Many species revealed high rates of extra-pair paternity.But few of the studies have been carried out in the Asian population.Methods:From 2012 to 2019,we explored the extra-pair paternity of Marsh Tits(Poecile palustris)in Xianrendong National Nature Reserve,Liaoning Province,China.During the study,adult Marsh Tits were captured with mist nets and parental birds,with nest-box traps.Blood samples were taken from the brachial vein.Parentage analyses were carried out using nine highly variable microsatellite loci through Cervus 3.0 software and maximum likelihood approach.Results:Forty-nine offspring(15.08%)from 20 nests(45.45%)were the results of extra-pair fertilization out of a total of 325 offspring in 44 nests.The average extra-pair offspring ratio was 33.54%,with a set varying from 11.11 to 71.43%.Nine extra-pair fathers had been successfully identified,four of whom were the close neighbors of the focus nest while the nests of the remaining five were relatively far.No significant difference was found in the genetic similarity between the social and extra-pair mates of the female,nor in the heterozygosis among the maternal half-siblings.Conclusions:In general,our study proved that the extra-pair paternity in Marsh Tits and its extra-pair mating is independent of the genetic compatibility hypothesis.This complements the understudied bird's extra-pair paternity in Asian area and contributes to the comprehensive insight of birds'extra-pair paternity behaviors.

关 键 词：Extra-pair paternity Genetic compatibility hypothesis Marsh Tits MICROSATELLITE 

分 类 号：Q958[生物学—动物学]