CAJ | 학술논문

寄生者与宿主之间可形成一种类似军备竞赛的协同进化关系.杜鹃与其宿主之间的协同进化是迄今研究最多的一个寄生系统,但人们对亚洲杜鹃的了解却知之甚少.中国是亚洲寄生性杜鹃种类最丰富的国家,多种杜鹃鸟类,特别是形态非常相似的Cuculus属杜鹃同域分布于某一地区,给杜鹃雏鸟的种类鉴别带来很大困难.这种情况在欧洲不存在,因为Cuculus属杜鹃在欧洲仅1种,即大杜鹃(Cuculus canorus).本研究对同域繁殖于中国境内、外部形态特征非常相似的4种Cuculus属杜鹃,即大杜鹃、中杜鹃(C.saturatus)、小杜鹃(C.poliocephalus)和四声杜鹃(C.micropterus)雏鸟的重要形态鉴别特征进行了比较,并进一步通过采集雏鸟血样进行DNA分析加以确认.结果表明,Cuculus属4种杜鹃的雏鸟可通过嘴裂和羽毛两个重要形态特征加以区分.这是关于Cuculus属杜鹃雏鸟分子鉴定的首次报道.
기생자여숙주지간가형성일충유사군비경새적협동진화관계.두견여기숙주지간적협동진화시흘금연구최다적일개기생계통,단인문대아주두견적료해각지지심소.중국시아주기생성두견충류최봉부적국가,다충두견조류,특별시형태비상상사적Cuculus속두견동역분포우모일지구,급두견추조적충류감별대래흔대곤난.저충정황재구주불존재,인위Cuculus속두견재구주부1충,즉대두견(Cuculus canorus).본연구대동역번식우중국경내、외부형태특정비상상사적4충Cuculus속두견,즉대두견、중두견(C.saturatus)、소두견(C.poliocephalus)화사성두견(C.micropterus)추조적중요형태감별특정진행료비교,병진일보통과채집추조혈양진행DNA분석가이학인.결과표명,Cuculus속4충두견적추조가통과취렬화우모량개중요형태특정가이구분.저시관우Cuculus속두견추조분자감정적수차보도.
Interaction between a parasite and its host could lead to a co-evolutionary arms race.Cuckoo-host system is among the most studied of all brood parasite systems,but the cuckoos of Asia,on the other hand,are much less well known.China has the most abundant cuckoo species in Asia.Many of these co-occur in sympatric areas,posing a potential risk of mis-identification of cuckoo nestlings,especially in Cuculus species.In this study we have provided a practical criterion to identify cuckoo nestlings species in the field and performed molecular phylogeny to confirm our empirical results.These results indicate that two distinct characteristics of cuckoo nestlings,i.e.,the gape color pattern and feather traits can be considered as reliable species identification.To our knowledge,this is the first report for species identification of Cuculus nestlings through molecular analysis.