基因流介导的种间渐渗与物种界定

doi:10.3724/SP.J.1143.2012.11187

摘要/Abstract

摘要：

物种界定是生物学中最基本的问题之一。近年来随着分子生物学技术的进步如分子条形码的发展，物种界定也越来越引起人们的兴趣。界定一个物种或相似的一组物种时最重要的一个原则就是选择适合的分子标记。然而，植物中广泛存在的不完全谱系筛选与种间渐渗却常常会阻碍准确鉴定物种。最近，有关基因流介导的种间渗入和物种界定在理论和实验研究中都取得了重大进展。本文综述了基因流介导的物种形成；评价了种间渐渗与不完全谱系筛选的区别；最后总结出应该利用基因流速度较快的分子标记去鉴定物种。

关键词: 物种界定, 分子标记, DNA条形码, 种间渐渗, 不完全谱系筛选, 基因流

Abstract:

Species delimitation is one of the most fundamental issues in biology and has recently drawn significant interest. A main reason for the increasing interests was the barcoding initiative associated rapid development of molecular techniques. One of the most important principles to diagnose species or species groups is to choose appropriate markers. However, incomplete linkage sorting and introgression, which are widespread phenomena in plants, present major obstacles in species delimitation. Recently, significant progress in our understanding of gene flow dependent introgression and species delimitation has been made both theoretically and empirically. In this paper, we reviewed the gene flow mediated speciation; evaluated the difference of introgression and incomplete linkage sorting; and finally concluded that species delimitation should be more effective with markers experiencing high levels of gene flow.

Key words: Species delimitation, Molecular Marker, DNA barcoding, Species introgression, Incomplete linkage sorting, Gene flow

中图分类号:

Q 949
Q 943

杜芳, 徐放. 基因流介导的种间渐渗与物种界定[J]. Plant Diversity, 2012, 34(3): 257-262.

DU Fang, XU Fang. Gene Flow Dependent Introgression and Species Delimitation[J]. Plant Diversity, 2012, 34(3): 257-262.

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