الفهرس 
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Abstract
Using the traditional selection does not solve the problem of meat shortage in our country and with advent of molecular genetics and biotechnology, it becomes possible to significantly improve the meat production of animals. In this Study, blood and muscle tissue samples from Egyptian buffaloes were collected and then DNA and RNA were extracted also Serum samples from these animals were used for spectrophotometric measurement of Ca and P levels as well as ALP and GOT enzyme activities. The present study is the first report on polymorphisms of Mstn gene in Egyptian buffaloes and on the correlation between their SNPs with growth traits, MstnPro and mineral (Ca and P) and enzymatic (ALP and GOT) activity in serum of meat producing Egyptian buffaloes. The synonymous A31G was significantly (P ≤ 0.001) correlated with ADG, GH mRNA levels (at 24 month of age), MstnPro mRNA levels (at 6, 12 and 24 month of age), Ca, P , ALP and GOT serum levels (at 2 year of age). The GG animals have a higher ADG, GH, MstnPro, Ca, P , ALP and GOT as compared to AA genotype animals with lower meat production. This study may be practical for the improvement of Egyptian native buffaloes.