Population genetics of tunas in South China Sea inferred from control regions
Population genetics of tunas in South China Sea inferred from control regions
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DOI：
10.3724/sp.j.1231.2012.27693
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发表时间：
2012
影响因子：
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通讯作者：
Zhongduo Wang;Yusong Guo;Yun-rong Yan;Gang Hou;Yan-bo Fan;Bo Feng;Huo-sheng Lu;Chu-wu Liu
中科院分区：
文献类型：
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作者：
Zhongduo Wang;Yusong Guo;Yun-rong Yan;Gang Hou;Yan-bo Fan;Bo Feng;Huo-sheng Lu;Chu-wu Liu
南海中国海是连接印度洋和太平洋的半封闭海域，由第一岛链环绕。黄鳍金枪鱼和大眼金枪鱼是南海最重要的经济鱼类。我们的数据支持以下结论：(1)两个物种都是高核苷酸变异，单倍型多样性很高(Hd99%)，而固定指数和聚类树的证据表明，BET的种群多样性高于YFT：(2)BET和YFT的种群间基因流动最强，南海和印度洋种群间的基因流动最强，分别为261.280和51.638，太平洋种群之间的基因流动最强，分别为10.868 8和-50.801 81；(3)两种金枪鱼均服从突增模型，与单峰型相比，其种群数量和种群分布呈双峰分布，并由最大跨度的Tau(=7.902)推算出种群的跨越时间(θ1/θ0=99999/14.752)，为金枪鱼渔业管理、捕捞配额的确定以及水产养殖提供依据。
The South China Sea(SCS)surrounded by the first island chain is a semi-enclosed sea linking the Indian Ocean and the Pacific Ocean.The population genetic features of the two most important economic species,yellowfin tuna(YFT,Thunnus albacares,17 adults and 44 juveniles)and big eye tuna(BET,T.obesus,22 adults and 4 juveniles)in SCS(11-12°N,15°N;110-112°E),have been analyzed based on the partial mitochondrial D-loop sequences.Our data supported the following conclusions:(1) both species were high nucleotide variation with very high haplotype diversities(Hd99%),while the evidence from fixation indexes,and cluster trees showed the population diversity of BET was higher than those of YFT;(2) For BET and YFT,the strongest gene flow between populations in SCS and the Indian Ocean were 51.638 and 261.280 10,then the Pacific by 10.868 8 and-50.801 81,respectively;(3) both species obey the sudden expansion model.Contrasted with the unimodal of YFT,the mismatch distribution of BET,as well as the SCS population,were bimodal.Moreover,the spanning time of SCS population of BET was later inferred from the Tau(=7.902)with biggest spanning scale(θ1/θ0=99 999/14.752).The results should be basic information for fisheries management,fishing quotas determination as well for aquaculture of tuna.