数字农科院2.0

QTL analysis on plant height and flowering time in Brassica napus

文献类型： 外文期刊

作者： Mei, D. S.;Wang, H. Z.;Hu, Q.;Li, Y. D.;Xu, Y. S.;Li, Y. C.

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关键词： plant height;flowering time;genetic base;145 F2:3 lines;LOD threshold

期刊名称： PLANT BREEDING

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收录情况： SCI

摘要： To identify quantitative trait loci (QTL) controlling plant height (PH) and flowering time (FT), a high stalk/later bloom Brassica napus line '2091' was crossed with a dwarf/early bloom mutant '99CDAM'. A segregating population with 145 F: lines was constructed and grown in field for 2 years. Based on this population, a linkage map consisting of 199 amplified fragment length polymorphism and 42 simple sequence repeat loci was constructed. The LOD threshold of 3.0 was used for declaring the existence of putative QTL. In total, seven QTL related to PH were identified, accounting for 8.5-28.6% of phenotypic variation, respectively, of which two QTL were identified in both years. Six QTL for FT were detected, accounting for 8.1-30.4% of phenotypic variation individually, of which two QTL were identified in both years. The main QTL of PH and FT were both mapped on linkage group 13, with overlapped creditable regions. QTL ph17 and ft17 existed at the same location. These might be the genetic base for the significant correlation observed between PH and FT.

分类号： S3

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