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A first genetic linage map construction and QTL mapping for growth traits in Larimichthys polyactis

文献类型： 外文期刊

作者： Liu, Feng 1 ; Zhan, Wei 1 ; Xie, Qingping 1 ; Chen, Honglin 1 ; Lou, Bao 1 ; Xu, Wantu 2 ;

作者机构： 1.Zhejiang Acad Agr Sci, Inst Hydrobiol, Shiqiao Rd 198, Hangzhou 310021, Peoples R China

2.Xiangshan Gangwan Aquat Seeds Co Ltd, Ningbo 315700, Peoples R China

期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）

ISSN： 2045-2322

年卷期： 2020 年 10 卷 1 期

页码：

收录情况： SCI

摘要： Larimichthys polyactis is a commercially important marine fish species in Eastern Asia, yet very few genetic resources exist. In particular, genetic linkage maps are critical tools for genetic breeding. In this study, we generated a high resolution linkage map from a family of 110 individuals and their parents by resequencing the individuals. 3,802 effective SNPs were mapped to 24 linkage groups (LGs). The map spanned 2,567.39 cm, with an average marker interval of 0.66 cm. We used the map to conduct QTL analysis for growth traits, and found 31 markers were significantly associated with growth-related traits. Specifically, three SNPs were identified for total length, nineteen SNPs for body length, and nine SNPs for body weight. The identified SNPs could explain 15.2-22.6% of the phenotypic variation. SNPs associated with growth traits were distributed on LG6 and LG11, and candidate genes included, kif26b, bat1, gna1, gbgt1, and amfr, which may regulate growth. The linkage map and mapped QTLs would be useful for improving the quality of L. polyactis via marker-assisted selection.

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