小麦ITMI重组自交系群体的穗长及株高QTL定位研究

QTL Mapping for Spike Length and Plant Height in ITMI Recombinant Intercross Lines Population of Wheat

【目的】通过对小麦重组自交系群体及其亲本为材料,利用已构建的高密度遗传图谱对该群体株高及穗长进行QTL定位。【方法】利用包含有110个株系的重组自交系群体,利用已构建的高密度遗传连锁图谱对小麦株高和穗长进行了QTL定位。【结果】两个环境下共检测到12个穗长相关QTL位点和8个株高相关的QTL位点。其中,穗长的1个位点(Qsl-1A),株高的3个位点(Qph-1A,Qph-5A-1和Qph-6A-2)在两个环境中都被检测到。【结论】研究为小麦的分子改良育种提供了重要的分子标记信息。

[Objective] The objective of this study was to identify QTLs for plant height and spike length based on a genetic map with high density and a RIL population. [Method] A recombinant intercross lines population contain 110 lines were used to perform QTL analysis based on a high density genetic map. [Results] A total of 12 QTLs for spike length were identified, and two of them were expressed in both investigated environments, and 6 were accounted for over 10% phenotypic variation. A total of 8 QTLs for plant height were identified, and 3 of them were expressed in both investigated environments, and two loci were accounted for over 10% phenotypic variation. [Conclusion] Taken together, All loci in present study are very important to spike morphology and yield improvement.