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

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, 9...

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Bibliographic Details
Published in:Molecular breeding 2007-09, Vol.20 (2), p.167-178
Main Authors: Li, Sishen, Jia, Jizeng, Wei, Xianyun, Zhang, Xiaocun, Li, Linzhi, Chen, Haimei, Fan, Yuding, Sun, Haiyan, Zhao, Xinhua, Lei, Tiandong, Xu, Yunfong, Jiang, Fangshan, Wang, Honggang, Li, Lihui
Format: Article
Language:English
Subjects:
Chromosome 7
Chromosomes
Clusters
Crop yield
Gene mapping
Genetic analysis
Genomes
Inbreeding
Kernels
Molecular biology
Phenotypic variations
Plant biology
Quantitative trait loci
Triticum aestivum
Wheat
Winter wheat
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Summary: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%).
ISSN:1380-3743
1572-9788
DOI:10.1007/s11032-007-9080-3