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Construction of a genetic linkage map, QTLs mapping for low salinity and growth-related traits and identification of the candidate genes in Pacific white shrimp (Litopenaeus vannamei)

文献类型： 外文期刊

作者： Chen, Bing 1 ; Zhong, Ping 1 ; Wu, Xiaopeng 1 ; Peng, Kai 1 ; Sun, Yuping 1 ; Chen, Xiaoying 1 ; Zhao, Hongxia 1 ; Xu, Zhongneng 2 ; Liu, Jinshang 1 ; Li, Huo 6 ; Li, Chaozheng 4 ; Huang, Wen 1 ;

作者机构： 1.Guangdong Acad Agr Sci, Fisheries Res Ctr, Inst Anim Sci,Guangdong Key Lab Anim Breeding & N, Key Lab Anim Nutr & Feed Sci South China,Minist A, Guangzhou 510640, Peoples R China

2.Jinan Univ, Inst Hydrobiol, Guangzhou 510632, Peoples R China

3.Guangdong Ocean Univ, Fishery Coll, Zhanjiang 524088, Peoples R China

4.Sun Yat Sen Univ, Sch Marine Sci, Southern Marine Sci & Engn Guangdong Lab Zhuhai, State Key Lab Biocontrol, 135 Xingang Rd West, Guangzhou 510275, Peoples R China

5.Guangdong Prov Lab Lingnan Modern Agr Sci & Techn, Maoming Branch Ctr, Maoming 525099, Peoples R China

6.Guangdong Jinyang Biotechnol Co Ltd, Guangdong Prov Engn & Technol Res Ctr, Maoming 525027, Peoples R China

关键词： Litopenaeus vannamei; Genetic linkage map; QTL; Low-salinity stress; Growth-related traits

期刊名称：AQUACULTURE REPORTS （ 影响因子：3.385； 五年影响因子：3.645 ）

ISSN： 2352-5134

年卷期： 2022 年 22 卷

页码：

收录情况： SCI

摘要： Low-salinity tolerance and growth are crucial economic traits of shrimp in areas with low-salinity water. In the current study, an F1 full-sib family of Pacific white shrimp (Litopenaeus vannamei) was obtained by the "semi-directional cross" method, and 2 parents and 146 progenies were genotyped using double-digest restriction site-associated DNA sequencing technology (ddRAD-Seq). A total of 3335 high-quality markers were identified and used to construct a genetic linkage map. This genetic map comprised 48 linkage groups (LGs), and the total map length spanned 3954.462 centimorgan (cM) with an average marker interval of 1.186 cM. Three quantitative trait loci (QTLs) for low-salinity tolerance and 3 QTLs for growth (body weight) were detected under the con-dition of restricted logarithmic odds (LOD) score >= 2.50. With the assistance of the genome of L. vannamei and relevant annotations, 3 potential growth-related genes (sob, TJP1 and ZBTB24) and 3 low-salinity response candidate genes (Rnf168, CNOT2 and RPB3) were identified from the genomic scaffolds. Moreover, the qPCR results showed that the expression levels of the 3 candidate genes were significantly affected by low-salinity stress, indicating that they possibly play an important role in low-salinity stress. Here, we present the first report of mapping of low-salinity tolerance QTLs in the genetic mapping of L. vannamei, which will be beneficial for the selection of shrimp breeding markers and might help promote the study of the L. vannamei genome.

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