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The construction of a genetic linkage map of non-heading Chinese cabbage (Brassica campestris ssp chinensis Makino)

文献类型： 外文期刊

作者： Cheng, Yan 1 ; Geng, Jianfeng 3 ; Zhang, Jingyi 1 ; Wang, Qian 1 ; Ban, Qingyu 1 ; Hou, Xilin 1 ;

作者机构： 1.Nanjing Agr univ, State Key Lab Crop Genet & Germplasm Enhancement, Nanjing 210095, Peoples R China

2.Nanjing Agr univ, Minist Educ, Key Lab So Vegetable Crop Genet Improvement, Nanjing 210095, Peoples R China

3.Henan Acad Agr Sci, Inst Hort, Zhengzhou 450002, Peoples R China

关键词： non-heading Chinese cabbage;genetic linkage map;SRAP;SSR;RAPD

期刊名称：JOURNAL OF GENETICS AND GENOMICS （ 影响因子：4.275； 五年影响因子：5.223 ）

ISSN： 1673-8527

年卷期： 2009 年 36 卷 8 期

页码：

收录情况： SCI

摘要： Non-heading Chinese cabbage (Brassica campestris ssp. chinensis Makino) is one of the most important vegetables in eastern China. A genetic linkage map was constructed using 127 doubled haploid (DH) lines, and the DH population was derived from a commercial hybrid "Hanxiao" (lines SW-13 x L-118). Out of the 614 polymorphic markers, 43.49% were not assigned to any of the linkage groups (LGs). Chi-square tests showed that 42.67% markers were distorted from expected Mendelian segregation ratios, and the direction of distorted segregation was mainly toward the paternal parent L-118. After sequentially removing the markers that had an interval distance smaller than 1 cM from the tipper marker, the overall quality of the linkage map was increased. Two hundred and sixty-eight molecular markers were mapped into 10 LGs, which were anchored to the corresponding chromosome of the B. rapa reference map based on common simple sequence repeat (SSR) markers. The map covers 973.38 cM of the genome and the average interval distance between markers was 3.63 cM. The number of markers on each LG ranged from 18 (R08) to 64 (R07), with an average interval distance within a single LG from 1.70 cM (R07) to 6.71 cM (R06). Among these mapped markers, 169 were sequence-related amplified polymorphism (SRAP) molecular markers, 50 were SSR markers and 49 were random amplification polymorphic DNA (RAPD) markers. With further saturation to the LG, the current map offers a genetic tool for loci analysis for important agronomic traits.

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