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首页> 外文期刊>Chelonian conservation and biology >Kinship Analysis of Offspring of the Giant South American River Turtle (Podocnemis expansa) Using Microsatellite DNA Markers
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Kinship Analysis of Offspring of the Giant South American River Turtle (Podocnemis expansa) Using Microsatellite DNA Markers

机译：使用微卫星DNA标记对南美大河龟（Podocnemis expansa）的后代进行亲缘关系分析

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摘要

The giant South American river turtle (Podocnemis expansa) is the largest extant member of the suborder Pleurodira and the largest freshwater chelonian in South America. Owing to its size, its meat is sought for consumption and trade in the Amazon region. The aim of the present study was to investigate the reproductive behavior of 2 different populations of P. expansa. Allelic frequency variation was studied in 6 DNA microsatellite loci of recently hatched offspring from 8 nests on a beach in the municipality of Oriximina in the state of Para, Brazil. Multiple paternity was identified in all nests studied. Between 5 and 10 fathers contributed to each nest. Compared with previous studies, a greater frequency of multiple paternity and a greater number of fathers contributing to each nest were found in the present investigation. The results suggest that populations from different locations may exhibit different paternity patterns due to ecological or biological differences. By comparison with previous studies, we suggest that the differences in the number of nests, proportion of offspring per nest, and number of loci analyzed in each study may influence the frequency of multiple paternity detected.
机译：南美河龟（Podocnemis expansa）是Pleurodira子亚目中最大的现存成员，也是南美最大的淡水龟科动物。由于其大小，其肉在亚马逊地区寻求消费和贸易。本研究的目的是调查2个不同种群的P.expansa的生殖行为。在巴西帕拉州Oriximina市的一个海滩上，最近孵出了8个巢穴的后代的6个DNA微卫星基因座，研究了等位基因频率变异。在所有研究的巢中都鉴定出多重亲子关系。每个巢穴中有5至10个父亲。与以前的研究相比，在本次调查中发现了更多的父系陪伴频率和为每个巢穴做出贡献的父亲数量。结果表明，由于生态或生物学差异，不同地区的人口可能表现出不同的亲子关系模式。通过与以前的研究进行比较，我们建议每个研究中的巢数，每个巢的后代比例以及基因座数目的差异可能影响检测到的多个亲子关系的频率。

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