摘要
扬麦17和宁麦18均为高产小麦品种,为研究两者的株高遗传机制,以扬麦17与宁麦18杂交获得的310个F2单株及其衍生F2:3家系为材料,利用已构建的覆盖19条染色体的遗传连锁图谱,对株高性状进行QTL定位。应用复合区间作图法定位到8个株高QTL,分别位于2D、4B、5A、5B和7A染色体上,4个QTL在两世代中均检测到,其中QPh-YN-5A.1为一主效株高QTL位点,矮秆效应来自扬麦17,LOD值为8.69和12.81,可解释14.36%和20.46%的表型变异;QPh-YN-2D.1、QPh-YN-5B.2和QPh-YN-7A的矮秆效应来自宁麦18,可在两世代中分别解释2.84%和6.37%、4.26%和5.46%、2.15%和3.16%的表型变异。另外4个QTL仅在单世代检测到,其中QPh-YN-2D.2、QPh-YN-4B和QPh-YN-5B.1的矮秆效应来自宁麦18,可分别解释5.05%、11.24%和4.62%的表型变异,QPh-YN-5A.2的矮秆效应来自扬麦17,可解释7.72%的表型变异。
Both Yangmai 17 and Ningmai 18 are high-yielding wheat varieties.To study the genetic mechanism of plant height,the population of 310 F 2 and its F 2:3 generations derived from the hybridization between Yangmai 17 and Ningmai 18 were used to detect the quantitative trait loci(QTLs) for plant height.A genetic linkage map covering 19 chromosomes of wheat was established,and QTL mapping of plant height traits was carried out.A total of eight plant height QTLs were mapped by Composite Interval Mapping(CIM) based on the genetic map and phenotypic data,which are located on 2D,4B,5A,5B and 7A chromosomes,and four QTLs were detected in both generations.QPh-YN-5A.1 is a main-effect QTL,explaining 14.36% and 20.46% of the phenotypic variances,the dwarfing effect of which was contributed by Yangmai 17.QPh-YN-2D.1,QPh-YN-5B.2 and QPh-YN-7A explained 2.84% and 6.37%,4.26% and 5.46%,2.15% and 3.16% of the phenotypic variances respectively,the dwarfing effect of which was contributed by Ningmai 18.Four QTLs were detected only in a single generation.QPh-YN-2D.2,QPh-YN-4B and QPh-YN-5B.1 explained 5.05%,11.24% and 4.62% of the phenotypic variances respectively,the dwarfing effect of which was contributed by Ningmai 18.QPh-YN-5A.2 explained 7.72% of the phenotypic variances,the dwarfing effect of which was contributed by Yangmai 17.
作者
胡文静
梁秀梅
高致富
高德荣
程顺和
HU Wenjing;LIANG Xiumei;GAO Zhifu;GAO Derong;CHENG Shunhe(Institute of Agriculture Sciences of the Lixiahe District,Branch of National Wheat Improvement Center,Yangzhou,Jiangsu 225007,China;Henan Agricultural University/Collaborative Innovation Center of Henan Grain Crops,Zhengzhou,Henan 450002,China)
出处
《麦类作物学报》
CAS
CSCD
北大核心
2019年第7期768-774,共7页
Journal of Triticeae Crops
基金
国家重点研发计划项目(2016YFD0101802,2017YFD0100801)
江苏省自然科学基金项目(BK20171279)
国家现代农业产业技术体系建设专项(CARS-3-2-11)
扬州市现代农业项目(YZ2016033)
关键词
小麦
株高
分子标记
QTL
Wheat
Plant height
Molecular marker
QTL
