摘要
【目的】解析半透明皱缩玉米胚乳形成机制.【方法】以纯合玉米突变体M-E-479为供试材料,通过对M-E-479籽粒进行表型鉴定、遗传分析、主要成分测定及扫描电镜观察,构建定位群体,利用图位克隆技术对突变基因进行遗传定位.【结果和结论】M-E-479突变体胚乳中脂肪含量增加,蛋白质和淀粉含量下降,淀粉粒的大小、形状、排列空间发生改变;用F2群体将突变基因定位在10号染色体SSR标记bnlg1074与umc1506之间,两标记的遗传距离约为3.6 cM,两标记的物理距离约为2.2 Mb.可见M-E-479是一个新的玉米半透明皱缩胚乳突变体,突变性状是由隐性单基因控制.
Objective To analyze the formation mechanism of translucent and shrunken maize endo-sperm.[Method] The mutant M-E-479 of homozygous maize was used as experimental materials in our study .Through phenotypic identification , genetic analysis , main ingredients measurement and scanning electron microscopy , mapping population of M-E-479 was selected and map-based cloning technology was performed to locate the mutant gene .[Result and conclusion] The result showed that the amount of fat in-creased , while the protein and starch decreased , and the starch grains changed in size , shape and space configuration in the mutant endosperm of M-E-479 .The mutant gene is located between SSR markers bn-lg1074 and umc1506 of chromosome 10 by using F2 population .Meanwhile , the genetic distance is about 3.6 cM and the physical distance is about 2.2 Mb.The results suggest that M-E-479 is a new translucent and shrunken maize endosperm mutant , and its mutant character may be controlled by a recessive single gene .
出处
《华南农业大学学报》
CAS
CSCD
北大核心
2014年第5期31-35,56,共6页
Journal of South China Agricultural University
基金
国家自然科学基金(31170731
31200611)
上海市科学技术委员会资助项目(10DZ2271800)
吉林省科技发展计划项目(20130206012NY)
关键词
玉米
胚乳突变体
遗传分析
基因定位
maize
endosperm mutant
genetic analysis
gene mapping
