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为了提高高产和理想株型小麦的选育效率,以普通小麦(Triticum aestivum L.)宁春4号和宁春27号杂交得到的128个F9代重组自交系(RILs)为试验材料,利用从1 001个SSR标记中筛选出的307个在亲本之间存在多态性的标记对该群体进行遗传分析和QTL检测。构建了覆盖小麦21对染色体的包含291个SSR标记的遗传连锁图谱,遗传距离总计2 576.09cM,标记间平均遗传距离为8.85cM。以复合区间作图法(ICIM)分别对旗叶长度、宽度和叶绿素含量进行加性QTL检测,分别检测到6、8和4个QTL。多数QTL只在单一生态环境下检测到,说明这些性状受一定环境因素的影响。
In order to improve the breeding efficiency of high-yielding and ideal plant type wheat, 128 F9 recombinant inbred lines (RILs) derived from a cross between ordinary wheat (Triticum aestivum L.) Ningchun 4 and Ningchun 27 were used as experimental materials. Genetic analysis and QTL detection of 307 populations with polymorphisms among parents were carried out from 1 001 SSR markers. A genetic linkage map of 291 SSR markers covering 21 chromosomes of wheat was constructed, with a total genetic distance of 2 576.09 cM and an average genetic distance between markers of 8.85 cM. The QTLs for flag leaf length, width and chlorophyll content were detected by composite interval mapping (ICIM), and 6, 8 and 4 QTLs were detected respectively. Most QTLs were detected only in a single ecological environment, indicating that these traits are affected by certain environmental factors.