基于线粒体Cytb基因的10种石珊瑚的系统发育关系Phylogenetic Relationships in 10 Species of Scleractinian Coral Based on Cyt b Sequences
刘丽;陈育盛;李晓娜;申玉春;刘楚吾;
摘要(Abstract):
通过PCR扩增直接测序得到10种徐闻石珊瑚线粒体Cyt b基因部分序列,分析其碱基组成和变异频率,并采用Neighbor-Joining和Maximum Parsimony法构建系统发育树。结果显示:序列中A+T比例为61.0%,G+C比例为39.0%,前者明显高于后者,碱基替换主要发生在密码子第3位;滨珊瑚科分类与传统分类存在一定差异,揭示传统形态学分类可能受珊瑚骨骼生长可塑性限制,造成分类不准确;刺柄珊瑚属与蜂巢珊瑚科各属亲缘关系较近。
关键词(KeyWords): 石珊瑚;Cytb基因;碱基比例;变异频率;系统发育树
基金项目(Foundation): 国家海洋公益性行业科研专项(201105012);; 广东省海洋渔业科技推广专项(A200908F01);; 广东省自然科学基金(8452408801001272)
作者(Authors): 刘丽;陈育盛;李晓娜;申玉春;刘楚吾;
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