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Position: Home > Articles > QTL Mapping and Epistatic Effect Analysis of Ear Traits in Maize Chinese Agricultural Science Bulletin 2018 (9) 62-67

玉米穗部性状QTL定位及上位性效应分析

作  者：
宋晓恒;豆丹丹;柳华峰;刘浩浩;赵帅帅;郑耀刚;库丽霞;陈彦惠
单  位：
河南农业大学农学院河南粮食作物协同创新中心省部共建小麦玉米作物学国家重点实验室
关键词：
玉米;籽粒深度;穗长;QTL定位;上位性效应
摘  要：
为从分子水平上解析玉米穗长、穗粗和籽粒深度的遗传基础,以豫82×豫87-1衍生的一套重组近交系(RIL)群体为材料,通过多点的表型鉴定,采用SNP标记构建的遗传连锁图谱进行QTL定位及上位性效应分析。结果表明,在穗部3个性状中共检测到的18个相关QTL,并且与环境的互作均不显著。在这些QTL中,位于第1染色体调控穗长的q EL1-1和第2染色体调控粒深的q KD2-1、q KD2-2,分别解释表型变异的6.21%和10.11%、8.90%。上位性效应分析结果表明,共检测到3对位点间互作,互作效应为1.23%~6.49%,其中有1对位点互作达到显著水平。本研究为进一步图位克隆相关关键基因及分子标记辅助育种提供了重要的参考价值。
译  名：
QTL Mapping and Epistatic Effect Analysis of Ear Traits in Maize
作  者：
Song Xiaoheng;Dou Dandan;Liu Huafeng;Liu Haohao;Zhao Shuaishuai;Zheng Yaogang;Ku Lixia;Chen Yanhui;Agricultural College, Henan Agricultural University, Henan Crops Collaborative Innovation Center,State Key Laboratory of Wheat and Maize Crop Science;
关键词：
maize;;ear traits;;ear length;;QTL mapping;;epistatic effect analysis
摘  要：
The study aims at clarify the genetic basis of ear length(EL), ear diameter(ED) and kernel depth(KD) at molecular level in maize. The recombinant inbred lines(RIL) generated from a crossing between inbred lines Yu82 and Yu87-1 were used as materials. The phenotype identification of multiple locations, the quantitative trait locus(QTL) mapping and epistatic effect analysis based on genetic linkage with SNP marker were conducted in this study. The results showed that 18 QTLs associated with the three traits were identified,and the interaction with the environment was insignificant. In these QTLs, q EL1-1 associated with EL was in chromosome 1, and q KD2-1, q KD2-2 associated with KD was in chromosome 2, they could explain 6.21%,10.11%, and 8.90% of the phenotypic variation, respectively. The epistatic effect analysis showed three pairsof locus interactions with the effect of 1.23%-6.49%, and one pair interaction reached the significant level.This study provides important reference for map-based cloning related to key genes and molecular mark assisted breeding.

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