Correlation analysis of SNP markers and growth traits of Leiocassis longirostris

Abstract:

In this study, a correlation analysis of 57 single nucleotide polymorphism (SNP) markers and growth-related traits of Leiocassis longirostris was conducted using 115 samples under the same growth conditions. The results showed that 10 loci were related to growth-related traits. Among them, three (cluster-65_137265, cluster-65_111833, and cluster-65_137642) loci had a significant influence on growth-related traits (body weight, total length, body length, and head height) (P<0.05). Cluster-65_120392, cluster-65_105077, and cluster-65_5592_0 had significant influences on body weight, total length, and body length (P<0.05). Cluster-65_110382 significantly influenced total length, body length, and head height (P<0.05). Cluster-65_19497 and cluster-24304_1 had a significant influence on the total length and body length (P<0.05). Cluster-65_130153 significantly influenced body length and head height (P<0.05). We also estimated the genetic diversity parameters for the 10 loci. The mean observed heterozygosity, expected heterozygosity, and the polymorphism information content (PIC) were 0.537, 0.467, and 0.357, respectively. In addition, cluster-65_137265, cluster-65_111833, cluster-65_110382, and cluster-65_137642 were associated with anion exchange protein 2-like isoform X1, Netrin-4-like, Tec isoform X2, anion exchange protein 2-like isoform X1, and carbamoyl-phosphate synthase [ammonia] have the highest similarity, respectively. This finding indicates that these four genes may be involved in the regulation of L. longirostris growth. The study provides primary data for the genetic improvement and selective breeding of L. longirostris.