The Mating System of the Sichuan Snub-Nosed Monkey (Rhinopithecus roxellana)
The Mating System of the Sichuan Snub-Nosed Monkey (Rhinopithecus roxellana)
复制标题
川金丝猴的交配系统
DOI：
10.1002/ajp.20747
复制
发表时间：
2010-01-01
影响因子：
2.4
通讯作者：
Li, Baoguo
中科院分区：
文献类型：
--
作者：
Guo, Songtao;Ji, Weihong;Li, Baoguo
本文首次对我国特有濒危物种川金丝猴（Rhinopithecus roxellana）的交配系统进行了遗传学研究。利用野外观察和微卫星DNA分析相结合的方法，对秦岭地区的一个群体（WRT）进行了调查。在一个交配季节，一只雄性平均与5.7只雌性交配。在研究期间，观察到约18%的雌性动物与一只以上的雄性动物交配。大多数交配（94.5%）是由雌性发起的。28的430个观察到的交配是额外的单位交配。利用8个多态性微卫星位点进行亲子鉴定。每个位点的等位基因数为3 ~ 7个（平均4.3个）。观察到的杂合性范围在0.32和0.79之间。没有一个位点偏离Hardy-Weinberg平衡。亲子排除的结果显示，21个未成熟个体中有12个（57.1%）是由单位外的雄性所生。虽然金丝猴的基本社会单位与一夫多妻制交配系统一致，但野外观察和遗传数据都表明它们的交配系统是一夫多妻制。杀婴和避免近亲繁殖是雌性金丝猴滥交的最可能的解释。Am. J. Primatol. 72：25-32，2010. (C)2009威利-利斯公司
This article reports the first genetic study of the mating system of the Sichuan snub-nosed monkey (Rhinopithecus roxellana), an endemic and endangered species in China. The investigation was carried out in a population (WRT) in the Qinling Mountains using data from both field observation and paternity analysis through microsatellite DNA profiling. During a mating season, a male on an average copulated with 5.7 females. Approximately 18% of the females were observed to copulate with more than one male over the study period. The majority of copulations (94.5%) were initiated by females. Twenty-eight of 430 observed matings were extra-unit copulations. Eight polymorphic microsatellite loci were used for paternity analysis. The number of alleles at each locus ranged from 3 to 7 (mean=4.3). Observed heterozygosity ranged between 0.32 and 0.79. None of the loci showed significant deviation from Hardy-Weinberg equilibrium. Results from paternity exclusion showed that 12 of 21 (57.1%) immature individuals were sired by extra-unit males. Although the basic social unit of snub-nosed monkeys is consistent with a polygynous mating system, both field observation and genetic data suggests that their mating system is polygamous. Infanticide and inbreeding avoidance are the most likely explanations for the promiscuity of female snub-nosed monkeys. Am. J. Primatol. 72:25-32, 2010. (C) 2009 Wiley-Liss, Inc.