本文選題：鲇 + 細胞色素b(Cytb)��； 參考：《水產(chǎn)學報》2017年10期

【摘要】：為進一步了解鲇這一廣布種的遺傳多樣性與種群遺傳結構,闡明該經(jīng)濟魚類的種群歷史動態(tài),本研究對我國長江(上游、中游)、珠江、福建、海南、遼河地區(qū)的野生鲇樣本進行mtDNA Cytb基因序列測定與種群遺傳多樣性和遺傳結構分析。結果顯示,在所分析的216個序列樣本中,共檢測出78個單倍型,其中Hap_45在鲇不同群體中分布最為廣泛;鲇總?cè)后w具有較高的單倍型多樣性(Hd=0.948±0.009)和核酸多樣性(Pi=0.017 99±0.000 55),暗示了其自然種群數(shù)量的相對穩(wěn)定;單倍型系統(tǒng)發(fā)育與網(wǎng)絡關系圖分析顯示,78種單倍型被分為4個分支,且不同單倍型分布相對集中,劃分為4個譜系。中性檢驗與錯配分析表明,不同水系野生鲇種群(4個譜系)在約晚更新世時期(0.04~0.05百萬年)經(jīng)歷過近期種群擴張事件。
[Abstract]:In order to further understand the genetic diversity and population genetic structure of Silurus meridionalis, and to elucidate the population history of this economic fish, this study was conducted on the Yangtze River (upper reaches, middle reaches, Pearl River, Fujian, Hainan, China). The mtDNA Cytb gene sequence, population genetic diversity and genetic structure of wild catfish in Liaohe region were analyzed. The results showed that 78 haplotypes were detected in 216 sequence samples, in which Hap_45 was most widely distributed in different populations of Silurus meridionalis. The total population of Silurus meridionalis has a high haplotype diversity of 0.948 鹵0.009) and a nucleic acid diversity of 0.017 9 鹵0.000 55, indicating the relative stability of its natural population, and the analysis of haplotype phylogeny and network diagram shows that 78 haplotypes are divided into four branches. The distribution of different haplotypes is relatively concentrated and divided into 4 lineages. Neutral test and mismatch analysis showed that wild Silurus meridionalis populations (4 lineages) experienced recent population expansion events during the late Pleistocene period (0.04 ~ 0.05 million years).
【作者單位】： 內(nèi)江師范學院生命科學學院長江上游魚類資源保護與利用四川省重點實驗室;西南大學淡水魚類資源與生殖發(fā)育教育部重點實驗室;
【基金】：公益性行業(yè)(農(nóng)業(yè))科研專項(200903048-089) 內(nèi)江師范學院校級項目(15JC12)~~
【分類號】：S917.4

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