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利用SRAPSSR和AFLP标记构建甘蓝型油菜遗传连锁图谱.doc

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中 国 农 业 科 学 40卷 6期 等: 中国农业科学 2007,40(6):1118-1126 Scientia Agricultura Sinica 收稿日期:2006-05-17;接受日期:2006-09-17 基金项目:国家“973”项目(2001CB1088);长江学者和创新团队发展计划(IRT0442) 作者简介:李媛媛(1979-),女,山东淄博人,博士研究生,研究方向为油菜分子生物学。Tel:027E-mail:yyli@。通讯作者马朝芝(1968-),男,湖北公安人,副教授,研究方向为油菜育种。Tel:027Fax:027E-mail:yuanbeauty@ 利用SRAP、SSR和AFLP 标记构建甘蓝型油菜遗传连锁图谱 李媛媛,沈金雄,王同华,傅廷栋,马朝芝 (华中农业大学作物遗传改良国家重点实验室,武汉 430070) 摘要:【目的】建立甘蓝型油菜的高质量遗传图谱,为在分子水平上研究复杂性状打下基础并提供保证。【方法】以甘蓝型油菜自交不亲和系“SI-1300” 及其恢复系“Eagle”组配得到的184个F2单株为群体,利用SRAP、SSR和AFLP标记技术构建甘蓝型油菜遗传图谱。【结果】该图谱共包含21个连锁群,涉及137个SRAP标记、143个SSR标记和118个AFLP标记。图谱总长1 949.8 cM,标记间平均图距为4.9 cM。以SSR标记为锚定标记,该图谱与国际标准图谱进行了初步对应。研究共发现了8个偏分离区域。【结论】根据对标记分布的均匀程度,图谱覆盖程度以及标记密度等方面的分析,本研究构建的甘蓝型油菜分子遗传图谱质量较高,并且SRAP标记可能是比AFLP标记更适合于图谱构建的标记体系。 关键词:油菜;遗传图谱;AFLP;SRAP;SSR Construction of a Linkage Map Using SRAP, SSR and AFLP Markers in Brassica napus L. LI Yuan-yuan, SHEN Jin-xiong, WANG Tong-hua, FU Ting-dong, MA Chao-zhi (National Key Laboratory of Crop Genetic Improvement in Wuhan, Huazhong Agricultural University, Wuhan 430070) Abstract: 【Objective】Genetic map is a powerful tool to localize quantitative trait loci for quantitative traits.【Method】SSR, AFLP, and SRAP markers were applied to construct a genetic linkage map of rapeseed in an F2 population of 184 individuals, which was developed by crossing “SI-1300” and “Eagle”. 【Result】A genetic linkage map containing 21 linkage groups (LGs) was constructed using 143 SSR, 118 AFLP, and 137 SRAP markers, and the map covered 1 949.8 cM with an average marker interval of 4.9 cM. Furthermore, the links between the map published by Parkin et al. and ours were established by the public microsatellites (SSR markers). In addition, the distribution of markers on all LGs was even except N7 based on the analysis of Kolmogorov-Smirnov. However, the distorted markers mainly clustered in LGs, and eight segregation distortion regions on seven LGs were detected. 【Conclusion】 According to the analys
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