Characterization of single nucleotide polymorphism in IGF1 and IGF1R genes associated with growth traits in striped catfish (Pangasianodon hypophthalmus Sauvage, 1878)

• Published in: Aquaculture 2021-05, Vol.538, p.736542, Article 736542
• Main Authors: Tran, Trang Thi Huyen, Nguyen, Hoa Thi, Le, Binh Thi Nguyen, Tran, Phuc Huu, Van Nguyen, Sang, Kim, Oanh Thi Phuong
• Format: Article
• Language: English
• Subjects: Growth related SNPs; IGF1; IGF1R; Pangasianodon hypophthalmus; Striped catfish
• ISSN: 0044-8486; 1873-5622
• DOI: 10.1016/j.aquaculture.2021.736542

Development of molecular markers for growth trait in striped catfish (Pangasianodon hypophthalmus) is of importance to the aquaculture industry in the Mekong river delta. This study aims to analyze the genetic variation and the effects of the Insulin-like growth factor 1 (IGF1) and Insulin-like growth factor 1 receptor (IGF1R) genes on growth traits in striped catfish. We sequenced fragments of IGF1 and IFG1R genes from 10 individuals of fast-growing fish and 10 individuals of slow-growing fish to discover single nucleotide polymorphisms (SNPs). Among the discovered SNPs, one SNP (13,680 A > T in intron 2) of IGF1 gene, three SNPs (13,357 T > C, 15392 T > A in intron 1 and 83,894 A > G in intron 15) in IGF1R gene were filtered and further validated by individual genotyping in 70 fast-growing fish and 70 slow-growing fish using the multiplex SNaPshot method (single base extension method). Our analyses showed that two SNPs (IGF1:13680 A > T and IGF1R:13357 T > C) were significantly associated with the growth trait (p  C led to the positive cumulative effect on the growth (p  T and IGF1R:13357 T > C) were significantly associated with growth traits.•The combination of genotypes AA of IGF1:13680 A > T and TT of IGF1R:13357 T > C has positive effect on growth traits.•The two SNPs would be candidate markers for further studies in marker assisted selection (MAS) in pangasius aquaculture.