玉米丝黑穗病菌基因组SSR的信息分析  

Information Analysis on Microsatellites in the Genome of Sporisorium reilianum

作　　者：王士臻[1] 张作刚[1] 李新凤[1] 高俊明[1] 王建明[1] 

机构地区：[1]山西农业大学农学院,山西太谷030801

出　　处：《山西农业大学学报（自然科学版）》2012年第6期488-491,共4页Journal of Shanxi Agricultural University(Natural Science Edition)

基　　金：山西省科技攻关项目(20120311019-3);山西省自然科学基金项目(2006011080)

摘　　要：利用已经公布的玉米丝黑穗病菌基因组测序的结果,对该基因组中基序为2～6碱基的微卫星(SSR)序列进行了系统的分析。结果表明,在已经公布的23条基因组中选择前3条染色体进行分析,共有888个SSR,其总长度为3.512kb,占这3条基因组染色体碱基数的0.068%,平均6.50kb中就分布有一个长度大于15bp的SSR序列。其中,数量最多的为三碱基重复序列,共有SSR数量329个,其次为六碱基重复序列,数量达185个。五碱基重复序列的SSR数量为155个,数量最少的是四碱基重复序列,只有101个。A total of genome of publicly available DNA sequence in Sporisorium reilianum was researched for dinucleotide to hexanucleotide simple sequence repeat （SSR） to determine the type, size and frequency. A total of 888 SSRs were observed in the first three chromosomes. Total length of SSRs was 3. 512 kb, about 0. 068% of these chromosomes. The SSRs occur on average about once every 3. 512 kb for dinucleotide to hexanucleotide in the first three chromo-somes. The most abundant microsatellites were trinucleotide repeats with the number of 329, followed by hexanucleoti-de and pentanucleotide repeats, and the number of these SSRs was 185 and t55, respectively. The least abundant was tetranucleotide repeat, only 101 were found.

关 键 词：玉米丝黑穗病菌 基因组 微卫星序列 频率 分布 

分 类 号：S435.131.42[农业科学—农业昆虫与害虫防治]