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玉米是世界范围内具有经济重要性的作物之一.株高和穗位高是玉米育种过程中需考虑的2个重要农艺性状,对玉米产量、抗倒伏性及株型等都有较大影响.为进一步明确玉米株高和穗位高的遗传机制,本研究以B73×Zheng58的含有165个株系的F3:4重组自交系群体为作图群体,利用覆盖玉米10条染色体189个SSR标记对株高和穗位高进行QTL定位分析.总共定位到5个株高QTL和6个穗位高QTL;这11个QTL分布在除2号和6号之外的其他8条染色体上.单个QTL表型变异贡献率的变幅为4.3%~14.2%.其中10个QTL与以前报道过的QTL的位置相近或重叠,而株高QTL(qPH04-01)是新发现的群体专一性的QTL,最靠近标记umc0371,表型变异贡献率为8.8%,是值得进一步研究和利用的位点.
Corn is one of the most economically important crops in the world.The plant height and ear height are two important agronomic traits to be considered in the process of maize breeding and have a great impact on the yield, lodging resistance and plant type of maize In order to further clarify the genetic mechanism of plant height and ear height in maize, in this study, a population of F3: 4 recombinant inbred lines of 165 lines in B73 × Zheng58 was used as a mapping population. A total of 189 SSRs The QTLs for plant height and ear height were mapped with five QTLs for plant height and six QTLs for ear height. The 11 QTLs were mapped on 8 chromosomes except 2 and 6. The contribution of single QTL phenotypic variation ranged from 4.3% to 14.2%, of which 10 QTLs were similar to or overlapped with previously reported QTLs, while the QTL for plant height (qPH04-01) was a newly discovered group-specific Of the QTL, closest to the marker umc0371 phenotypic variation contribution rate of 8.8%, is worth further study and use of the site.