【摘要】 研究以斯卑尔脱小麦(Triticum spelta)Hubel及其早熟诱变系2463为材料,采用主-多基因混合模型多世代联合分析发现,抽穗期性状由两个主基因控制,其遗传力为44%～81%。温室春化和光周期处理实验结果表明,经过春化处理后,与Hubel相比,其早熟诱变系在长日照条件下的抽穗期提前10d左右,表现为显著差异。利用F2分离群体进行的分子标记定位结果表明,在2D染色体的短臂上存在一个主效QTL,与标记Xwmc112紧密连锁,能解释表型变异的16%,与前人定位的光周期相关QTL/基因(Ppd1)位于同一区域。更多还原

【Abstract】 The inheritance of an early-maturity spelt wheat(Triticum spelta) Hubel and mutant line 2463 were analyzed using major-polygene mixed inheritance model.The results indicated that heading date was controlled by two major genes,and their heritability was 44%～81%.Further analysis revealed that,after vernalization,the heading date of Hubel was about 10 days later than that of mutant line 2463.Moreover,using F2 population derived from cross combination 2463/Hubel,one QTL controlling early heading date,which tightly linked to SSR marker Xwmc112,was mapped on the short arm of chromosome 2D,and this QTL could contribute for 16% of the observed phenotypic variation of heading date and located on the same chromosome region to QTL photoperiod sensitive gene(Ppd1) mapped in previous study.更多还原