A intervarietal genetic map and QTL analysis for yield traits in wheat

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• 作者：Sishen Li ; Jizeng Jia ; Xianyun Wei ; Xiaocun Zhang ; Linzhi Li ; Haimei Chen ; Yuding Fan ; Haiyan Sun ; Xinhua Zhao and Tiandong Lei ; et al.
• 关键词：Wheat ; Molecular marker ; Genetic linkage map ; QTL ; Yield trait ; SSR ; EST ; SSR ; ISSR ; SRAP and TRAP
• 刊名：Molecular Breeding
• 出版年：2007
• 出版时间：September, 2007
• 年：2007
• 卷：20
• 期：2
• 页码：167-178
• 全文大小：391 KB
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Plant Sciences
  
• 出版者：Springer Netherlands
• ISSN：1572-9788

文摘

A new genetic linkage map was constructed based on recombinant inbred lines (RILs) derived from the cross between the Chinese winter wheat (Triticum aestivum L.) varieties, Chuang 35050 and Shannong 483 (ChSh). The map included 381 loci on all the wheat chromosomes, which were composed of 167 SSR, 94 EST-SSR, 76 ISSR, 26 SRAP, 15 TRAP, and 3 Glu loci. This map covered 3636.7 cM with 1327.7 cM (36.5%), 1485.5 cM (40.9%), and 823.5 cM (22.6%) for A, B, and D genome, respectively, and contained 13 linkage gaps. Using the RILs and the map, we detected 46 putative QTLs on 12 chromosomes for grain yield (GY) per m2, thousand-kernel weight (TKW), spike number (SN) per m2, kernel number per spike (KNS), sterile spikelet number per spike (SSS), fertile spikelet number per spike (FSS), and total spikelet number per spike (TSS) in four environments. Each QTL explained 4.42–70.25% phenotypic variation. Four QTL cluster regions were detected on chromosomes 1D, 2A, 6B, and 7D. The most important QTL cluster was located on chromosome 7D near the markers of Xwmc31, Xgdm67, and Xgwm428, in which 8 QTLs for TKW, SN, SSS and FSS were observed with very high contributions (27.53–67.63%).