禾本科同源染色体对趋同进化的比较基因组学  

Comparative Genomics Studies ofHomoeologous Chromosomes Pairs Concerted Evolution in Grass genome

作　　者：马雪莲[1] 王振怡[1] 聂林曼 汪厚龙 张琼[1] 王金朋[1] 

机构地区：[1]河北联合大学生命科学学院,河北唐山063009

出　　处：《河北联合大学学报（自然科学版）》2014年第2期76-80,共5页Journal of Hebei Polytechnic University:Social Science Edition

基　　金：国家自然科学基金项目(31100913);河北联合大学科学研究基金项目(z201230;z201235);河北联合大学大学生创新性实验计划项目(X2013044)

摘　　要：多个禾本科物种全基因组测序的相继完成为禾本科植物基因组物理和遗传结构进化历史的研究提供了前所未有的良好机遇。以五个禾本科物种为研究对象,利用基因同源共线性方法对其基因组进行了比对分析,获得了物种的同源信息,并根据同源信息结合基因组同源结构分析,确定了物种基因组内和基因组间的同源染色体片段。比较分析同源染色体对上重复DNA片段之间的分子距离,初步揭示了禾本科植物同源染色体对间趋同进化规律,研究结果有助于理解染色体结构受非正常遗传重组影响的进化机制。A plurality of grass genome sequencing completed, provides an unprecedented opportunity for study its genome physical and genetic structures evolutionary history. The paper chooses five grass genomes as the research object. Here ,based on gene colinearity, comparative analysis of whole genome, identification of gene homologous information. And according to the homologous information combined with genomic structure analysis, identified the homologous chromosome fragments in each genome and between of them. Comparative analysis of molecules distance of duplicated gene pairs on homologous chromosomes fragments reveals the concerted evolution rules between homoeologous chromosomes pairs. The study results are helpful to understand the mechanism of evolution chromosome structure affected by illegitimate recombination.

关 键 词：禾本科物种 多倍化 同源染色体对 趋同进化 

分 类 号：Q944[生物学—植物学]