玉米株高和穗位高的全基因组关联分析  

Genome-wide Association Analysis of Plant Height and Ear Height in Maize

作　　者：李凯 张晓祥[1] 管中荣 沈亚欧[1] 潘光堂[1] 

机构地区：[1]四川农业大学玉米研究所,成都611130 [2]重庆渝东南农业科学院,重庆408000

出　　处：《玉米科学》2017年第6期1-7,共7页Journal of Maize Sciences

基　　金：高产转基因玉米新品种培育项目(216ZX08003003)

摘　　要：以360份具有广泛遗传变异的玉米自交系为试验材料,分别在四川崇州、洪雅、雅安和云南西双版纳4个地点,利用44 569个SNP标记对玉米株高、穗位高进行全基因组关联分析。结果表明,在不同环境下,株高和穗位高的表型均符合正态分布,且二者呈极显著的正相关关系。采用混合线性模型MLM在全基因组范围内对控制株高和穗位高的SNP进行挖掘,共检测到6个与株高显著关联的SNP位点,解释表型变异的14.26%;检测到18个与穗位高显著关联的SNP位点,解释表型变异的12.62%。在四川洪雅和雅安两个环境中检测到1个与株高相关稳定的SNP,该位点关联到的基因与细胞氨酰生物合成有关,推测其可能参与生长素合成,进而调控茎秆节间长。A total of 360 maize inbred lines with widely genetic variation were subjected to investigation of plant height and ear height under different environments including Chongzhou, Hongya, Ya＇ an, and Xishuangban- na. Combined the phenotypes, 44 569 SNP makers were used for genome-wide association analysis. The results showed that, the phenotypic values for both the traits displayed normal distributions, and a significantly positive cor- relation was observed between plant height and ear height in each of the environments. Under four environments, a total of 6 and 18 SNP loci were detected for plant height and ear height by the model of MLM, respectively, which ex- plained up to 14.26% and 12.62% of phenotypic variation. Among them, a common plant height SNP was detected in both Hongya and Ya＇ an, which was associated with the candidate gene GRMZM2GI01463. The gene participates in biosynthesis of and Auxin, regulating internode length of maize stem.

关 键 词：玉米 株高 穗位高 SNP 全基因组关联分析 

分 类 号：S513.035.3[农业科学—作物学]