Abstract
The myostatin (MSTN) gene was studied as a candidate genetic marker for growth traits. We investigated polymorphisms of the MSTN gene in 664 individuals from four goat populations and applied PCR-SSCP and DNA sequencing analysis to reveal two single nucleotide polymorphisms (DQ167575: g.368A&gt;C (p.Lys49Thr) and g.4911C&gt;T. At g.368A&gt;Clocus, the frequencies of g.368A allele were 0.75&ndash;0.81, and the frequencies of g.368C allele were 0.19&ndash;0.25. At g.4911C&gt;T locus, the frequencies of g.4911C allele were 0.76&ndash;0.82, and frequencies of g.4911T allele were 0.18&ndash;0.24. Compared to the female goats with AC genotype, those with AA genotype had superior body weight in Boer goats (15.69 &plusmn; 0.28 vs. 14.51 &plusmn; 0.31, P &lt; 0.05) and F<sub>1</sub> generation of Boer &times; Guanzhong dairy goats (19.39 &plusmn; 0.34 vs. 18.27 &plusmn; 0.33, P &lt; 0.05). In addition, the female goats with AA genotype (45.80 &plusmn; 0.33 cm) had greater withers height than those with AC genotype (44.78 &plusmn; 0.36 cm) in F<sub>2</sub> generation of Boer &times; Guanzhong dairy goats (P &lt; 0.05). Hence, the biochemical and physiological functions along with the results obtained in our investigation suggest that the MSTN gene might play an important role in affecting the growth traits in goats.&nbsp;
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