Molecular Cloning and Single Nucleotide Polymorphisms Identification of Myostatin cDNA in the Pearl Oyster,Pinctada fucata |
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| Authors: | Qin Li Yaoguo Li Xiande Huang Maoxian He |
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| Abstract: | Myostatin (MSTN or growth differentiation factor‐8) is considered a negative regulator of muscle growth and development. In this study, we cloned and characterized the full‐length MSTN cDNA from Pinctada fucata, and named it as the Pf‐MSTN cDNA. The single nucleotide polymorphisms (SNPs) in Pf‐MSTN cDNA were then screened and genotyped. The full‐length Pf‐MSTN cDNA was 2644 bp, including an open reading frame of 1248 bp encoding 415 amino acids which contained typical structural characteristics shared by all members of the transforming growth factor‐β (TGF‐β) superfamily including an N‐terminal signal peptide, a propeptide domain, and a TGF‐β superfamily bioactive domain. The Pf‐MSTN mRNA was detected in all tested tissues, with the highest mRNA levels observed in the adductor muscle, indicating that Pf‐MSTN may play a major role in this tissue. Furthermore, by sequencing and alignment, 32 SNP loci were identified in Pf‐MSTN cDNA. Genotyping 50 individuals from a common breeding stock revealed that 21 of these 32 loci were polymorphic. The minor allele frequency was in the range of 0.0400–0.4800, and the polymorphism information content value varied from 0.0739 to 0.3750. The observed and expected heterozygosity ranged from 0.0200 to 1.0000 and from 0.0776 to 0.5051, respectively. These SNPs identified in Pf‐MSTN will be useful for future studies investigating their utility in marker‐assisted selection for P. fucata breeding. |
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