一个新的玉米叶色突变体的遗传分析及基因定位  

Genetic Analysis and Gene Mapping of a New Leaf Color Mutant in Maize

作　　者：韩帅[1] 王立静[1] 钟世宜[1] 赵燕[1] 刘保申[1] 

机构地区：[1]山东农业大学农学院,山东泰安271018

出　　处：《玉米科学》2012年第3期26-28,共3页Journal of Maize Sciences

基　　金："十二五"农村领域国家科技计划课题(2011BAD35B01);山东省农业良种产业化项目(2007良种字<04>)

摘　　要：在玉米自交系81647中发现了一个叶色突变体,该突变体在苗期叶片表现出黄绿色,随后叶片上出现坏死斑,短时间内植株萎蔫死亡。遗传分析表明,该突变性状由1对隐性基因控制,命名为nec-t(necrotic-temporary)。以玉米自交系B73与nec-t突变体的F2分离群体作为定位群体,利用SSR标记将该基因定位在第2条染色体的K2和K14之间(SSR标记),其物理距离约为2.52 Mb。A new maize leaf color mutant was derived in maize inbred line 81647.The mutant displayed the yellow-green leaves at seeding stage and appeared necrotic spots in the leaves,then wilted to die quickly.The genetic analysis indicated that the mutant trait was controlled by a single recessive nuclear gene,designated as nec-t（necrotic-temporary）.In addition,by using SSR markers and an F2 segregating population derived from the cross between the B73 and nec-t mutant,the nec-t gene was mapped between K2 and K14 with a physical distance of 2.52 Mb on chromosome 2.

关 键 词：玉米 叶色突变体 遗传分析 基因定位 

分 类 号：S513.035[农业科学—作物学]