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Multiple paternity in the cultured yellow pond turtles (Mauremys mutica)

文献类型： 外文期刊

作者： Zhang, Xin-cheng 1 ; Zhao, Jian 2 ; Li, Wei 2 ; Wei, Cheng-qing 2 ; Zhu, Xin-ping 1 ;

作者机构： 1.Nanjing Agr Univ, Wuxi Fisheries Coll, Wuxi 214081, Jiangsu, Peoples R China

2.Chinese Acad Fishery Sci, Key Lab Trop & Subtrop Fishery Resource Applicat, Minist Agr, Pearl River Fisheries Res Inst, Guangzhou 510380, Guangdong, Peoples R China

关键词： Multiple mating;Mauremys mucita;Paternity assignment;Microsatellite loci

期刊名称：ANIMAL REPRODUCTION SCIENCE （ 影响因子：2.145； 五年影响因子：2.281 ）

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收录情况： SCI

摘要： As a result of hunting and habitat loss, wild populations of the yellow pond turtle, Mauremys mutica, are decreasing. The International Union for Conservation of Nature considers M. mutica to be an endangered species. All studied freshwater turtles have polyandrous mating with multiple paternity. To survey the mating strategies of M. mutica, 1 year's genetic data of parents and all offspring in an artificially captive population were analyzed. Two groups of multiplex PCR containing 16 microsatellite loci were used to analyze the paternity of 302 hatchlings from 132 parents and from 159 clutches. The genetic data indicated that multiple paternity is rare in M. mutica, occurring in only seven of 138 clutches. Although the frequency of multiple paternity was only 5.07%, results of the present research indicate that M. mutica has a polyandrous mating system. In the breeding season, the successive clutches of 34 females each had the same paternity as the previous clutches. It was observed that four males (f85, f58, f87, and f76) had more than 20 offspring each, totaling 99 and representing 32.78% of all offspring. This finding implies that paternity is competitive in this artificially captive population and might bias the genetic diversity of the offspring.

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