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利用以玉米自交系T319与9406为亲本构建的242个重组自交系(F8),对玉米株高和穗位高进行QTL(数量性状基因座位)分析,在第1、2、3、5、7、10染色体定位到6个株高QTL,位于umc2228与bnlg2295、bnlg1609与bnlg1350、bnlg210与umc1045,可解释表型变异率12.13%、13.00%、11.58%,为株高主效QTL;在第1、10染色体上检测到2个穗位高主效QTL,位于umc2228-bnlg2295、bnlg210与umc1045,可解释表型变异率10.73%、16.92%。位于umc2228-bnlg2295、bnlg210-umc1045的区域为株高和穗位高的一致主效QTL区间,这些位点的标记可进行株高和穗位高的株型改良分子标记辅助选择。
Based on 242 recombinant inbred lines (F8) constructed from maize inbred lines T319 and 9406, QTL (quantitative trait loci) were analyzed for maize height and ear height. The QTLs for plant height were located on the chromosomes 7 and 10, located at umc2228 and bnlg2295, bnlg1609 and bnlg1350, bnlg210 and umc1045, respectively, which explained that the phenotypic variation rates were 12.13%, 13.00% and 11.58% Two major QTLs for ear position were detected on chromosomes 1 and 10, located at umc2228-bnlg2295, bnlg210 and umc1045, which explained 10.73% and 16.92% of phenotypic variation. The loci located in umc2228-bnlg2295 and bnlg210-umc1045 were consistent major QTLs with high plant height and ear height. These loci could be used for marker-assisted selection of plant type with high plant height and ear height.