Linkage and mapping analyses of the densonucleosis non-susceptible gene nsd-Z in the silkworm Bombyx mori using SSR markers

文献类型： 外文期刊

第一作者： Li, MW

作者： Li, MW;Guo, QH;Hou, CX;Miao, XX;Xu, AY;Guo, XJ;Huang, YP

作者机构：

关键词： SSR markers;densonucleosis virus;non-susceptible gene;silkworm;Bombyx Mori

期刊名称：GENOME （ 影响因子：2.166； 五年影响因子：2.474 ）

ISSN： 0831-2796

年卷期： 2006 年 49 卷 4 期

页码：

收录情况： SCI

摘要： In the silkworm Bombyx Mori, non-susceptibility to the Zhenjiang (China) strain of the densonucleosis virus (DNV-Z) is controlled by the recessive gene nsd-Z (non-susceptible to DNV-Z), which is located on chromosome 15. Owing to a lack of crossing over in females, reciprocal backcrossed F-1 (BC1) progeny were used for linkage analysis and mapping of the nsd-Z gene using silkworm strains Js and L10, which are classified as being highly susceptible and non-susceptible to DNV-Z, respectively. BC, larvae were inoculated with the DNV-Z virus at the first instar, and DNA was extracted from the individual surviving pupae and analyzed for simple sequence repeat (SSR) markers. The nsd-Z gene was found to be linked to 7 SSR markers, as all the surviving larvae in the BC1 female (F-1 female x L10 male) showed the homozygous profile of strain L10, and the sick larvae in the BC1 female (F-1(female) x L10 male) showed the heterozygous profile of Js x L10 F-1 hybrids. Using a reciprocal BC1 male (L10 female x F-1 male) cross, we constructed a linkage map of 80.6 cM, with nsd-Z mapped at 30 cM and the closest SSR marker at a distance of 4.4 cM.

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