Genetic analysis of quantitative trait loci for cocoon and silk production quantity in Bombyx mori (Lepidoptera: Bombycidae)

文献类型： 外文期刊

第一作者： Li, Bing

作者： Li, Bing;Hou, Chengxiang;Li, Muwang;Hou, Chengxiang;Xu, Anying;Li, Muwang;Wang, Xiuye

作者机构：

关键词： Lepidoptera;Bombycidae;Bombyx mori;cocoon and silk production quantity;genetic linkage map;QTL mapping

期刊名称：EUROPEAN JOURNAL OF ENTOMOLOGY （ 影响因子：1.225； 五年影响因子：1.548 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Silk production quantity is the most economically important characteristic of the domesticated silkworm moth, Bombyx mori. It is controlled by multiple loci. The cocoon and silk production quantity of silkworm strains Jingsong and LanlO have significantly diverged. A backcross population (BCi) was bred using Jingsong and LanlO as parents to identify quantitative trait loci (QTLs) for silk quality. In this research, a genetic linkage map of the silkworm was constructed using the BCi mapping population. The map contained 85 sequence-tagged site markers, 80 simple sequence repeat markers, and 16 single nucleotide polymorphisms. A linkage map was constructed from the data, which consisted of 181 markers distributed over 28 expected linkage groups and spans 2147.1 cM in total length. Fourteen QTLs were detected for cocoon filament length, whole cocoon weight, pupae weight, filament weight, and cocoon shell weight. The 14 QTLs were distributed in 5 linkage groups (linkage groups 1, 14, 18, 23 and 25) based on the constructed linkage map. In addition, five QTLs, which had the highest logarithm (base 10) of odds (LOD) values, were located on the first chromosome, three of which located at the same region in linkage group 1. These results represent an important foundation for the map-based cloning of QTLs and marker-assisted selection for improving the silk quality of economically important silkworm strains.

分类号： Q96

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