Journal Name:
Malays. Appl. Bio
Volume:
2
Issue:
46
Pages From:
1
To:
8
Date:
Tuesday, May 30, 2017
Abstract:
Prolificacy data of Romanov sheep breed were retrieved from Sekhra Station (Jordan) through five parities. The data were
used for studying the effect of Fecundity (FecB), Growth Differentiation Factor 9 (GDF9) and Prolactin genes on the prolificacy
of Romanov ewes. GDF9, FecB and Prolactin genes genotypes were investigated in Romanov ewes by using the PCRRFLP
technique. The Mixed Model of SAS software was used for analyzing the data. The different gene genotypes and the
parity
were inserted in the Model as fixed effects while the dams were inserted as Random. Fecundity gene was observed to
be
monomorphic, the wild type genotype of Fecundity gene was found in the Romanov ewes. Prolactin and GDF9 genes
were
observed to be polymorphic in Romanov. The results revealed non-significant differences in the prolificacy of the ewes
that
carry AA and BB of Prolactin gene genotypes. The GDF9 gene genotypes showed significant (P
<0.0001)
differences in
prolificacy.
The homozygous MM genotype ewes produced 0.792 more lambs born per lambing than the heterozygous NM
genotype.
Selection based on GDF9 mutation may help in improving the prolificacy of Romanov sheep.
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