Mapping freezing tolerance quantitative trait loci in common wheat using a doubled haploid population
作者单位：Huabei Key Laboratory of Crop GermplasmHebei Agricultural University Shandong Agricultural University
会议名称：《2017年中国作物学会学术年会》
会议日期：2017年
基 金：基金项目:冬小麦种质资源与育种技术创新(16226320D) 小麦高效育种技术研究与利用(2017YFD0100606)
关 键 词：wheat QTL freezing tolerance ratio of free water to bound water antioxidant enzyme activity malondialdehyde
摘 要：Exposure to cold conditions is a major abiotic stress affecting crop growth and ***,quantitative trait loci(QTLs) for antioxidant enzyme activity,ratio of free water to bound water(RFB),and malondialdehyde(MDA) content in six environments were identified using a doubled haploid wheat population derived from a cross between Huapei-3 and Yumai-57 wheat *** QTLs were analyzed using an inclusive composite interval mapping ***,35 additive QTLs for specific traits were identified,including QRFB-2 A-1,which was detected in three ***,QPOD-2 D-2 and QPOD-1 B,which were associated with peroxidase activity,were detected in two environments,with QPOD-2 D-2 responsible for more than 10%of the phenotypic ***,QCAT-6 D-2 on chromosome 6 D explained 16.80%of the phenotypic variation,with the positive effect contributed by ***,eight additive QTLs for MDA content were detected on chromosomes 1 A,2 B,3 A,4 B,5 B.2,6 B,and 7 B,including QMDA-6 B between markers Xcfa2257 and Xcfd48,which was responsible for 20.21%of the phenotypic *** marker-assisted selection,the major QTLs detected in this study may be valuable for improving freezing tolerancein wheat.