首页|Genome-wide search for segregation distortion loci associated with the expression of complex traits in Populus tomentosa
Genome-wide search for segregation distortion loci associated with the expression of complex traits in Populus tomentosa
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国家科技期刊平台
NETL
NSTL
万方数据
维普
Segregation distortion of molecular markers has been reported in a broad range of organisms. It has been detected in an interspecific BC1 Populus pedigree established by controlled crossing between clone "LM50" (Populus tomentosa) and its hybrid clone "TB01" (P. tomentosa×P. bolleana). The study with a total of 150 AFLP markers (approximately 18.9% of the total loci)exhibited significant deviation from the Mendelian ratio (1:1) (p＜0.01). Twenty-five percent of the markers were mapped on the parental specific genetic linkage maps of clones "LM50" and "TB01" with a pseudo-test-cross mapping strategy. Twelve linkage groups had markers with skewed segregation ratios, but the major regions were on linkage groups TLG2, TLG4 and TLG6 in the linkage map of clone "LM50". We also analyzed the association between distorted loci and expression of complex traits with Mapmaker/QTL software. A total of 16 putative QTLs affecting 12 traits were identified in the distorted regions on seven linkage groups.Therefore we could detect the distribution of skewed loci along the entire genome and identify the association between quantitative traits and segregation loci via genetic mapping in an interspecific BC1 P. tomentosa family. Furthermore, the genetic nature and possible causes of these segregation distortions for differentiation between female and male parents were also discussed.
Populus tomentosagenetic mappingsegregation distortionQTL mapping
Zhang De-qiang、Zhang Zhi-yi、Yang Kai
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Key Laboratory of Genetics and Breeding in Forest Trees and Ornamental Plants, Ministry of Education, Institute of Populus tomentosa, Beijing Forestry University, Beijing 100083, P. R. China
Beijing Agricultural College, Beijing 102206, P. R. China
国家科技期刊平台
NSTL
万方数据
维普
