【摘要】：對采自海陵島的6種鯛科魚類(Sparidae)86個個體的線粒體COⅠ基因進(jìn)行測序,結(jié)合Gen Bank上的17條同源序列,共7屬11種103個個體進(jìn)行系統(tǒng)進(jìn)化分析。海陵島11種鯛科魚類COⅠ基因序列的T、C、A、G的平均含量分別為31.9%、27.6%、23.4%和17.1%,有保守位點359個,變異位點165個,簡約信息位點162個,序列中轉(zhuǎn)換大于顛換。Kimura 2-parameter種間遺傳距離顯示,真赤鯛和二長棘犁齒鯛的遺傳距離小于前者與藍(lán)點赤鯛的遺傳距離。應(yīng)用鄰接法(NJ法)和最大似然法(ML法)對103條序列分別構(gòu)建了鯛科魚類的分子系統(tǒng)進(jìn)化樹。結(jié)果顯示,鯛科魚類分為兩大類群,一類包括犁齒鯛屬、赤鯛屬、牙鯛屬和四長棘鯛屬,另一類包括平鯛屬、棘鯛屬和擬牛眼鯛屬。根據(jù)種間遺傳距離與系統(tǒng)發(fā)育樹的結(jié)構(gòu)特征推測,真赤鯛與二長棘犁齒鯛可能屬于同一屬,這與傳統(tǒng)的形態(tài)分類學(xué)觀點不完全相符。
[Abstract]:The mtDNA CO I gene of 86 individuals of (Sparidae) from 6 species of Sparaceae collected from Hailing Island was sequenced. Combined with 17 homologous sequences on Gen Bank, a total of 11 species and 7 species were analyzed for systematic evolution. The average contents of CO I gene sequences of 11 species of Sparaceae in Hailing Island were 31.9%, 27.6%, 23.4% and 17.1%, respectively. There were 359 conserved sites, 165 variant sites and 162 simple information sites. The genetic distance between Sparus macrocephalus and Sparus macrocephalus was smaller than that between Sparus macrocephalus and Sparus macrocephalus. The genetic distance between Sparus macrocephalus and Sparus macrocephalus was smaller than that between Sparus macrocephalus and Sparus macrocephalus. The molecular phylogenetic trees of Sparaceae were constructed by adjacent method (NJ method) and maximum likelihood method (ML method). The results showed that Sparaceae was divided into two groups, one of which included Sparus, Sparus and Sparus, and the other included Sparus, Sparus and Sparus macrocephalus. According to the structural characteristics of interspecific genetic distance and phylogenetic tree, it is inferred that Sparus macrocephalus and Sparus macrocephalus may belong to the same genus, which is not completely consistent with the traditional point of view of morphological taxonomy.
【作者單位】： 廣東海洋大學(xué)水產(chǎn)學(xué)院南海水產(chǎn)經(jīng)濟(jì)動物增養(yǎng)殖廣東普通高校重點實驗室;
【基金】：中央分成海域使用金支出項目(2011-2-2-09-3) 廣東省海洋漁業(yè)科技推廣專項(A201308E02) 廣東省科技計劃項目(2012B020307006)共同資助
【分類號】：Q953

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