[Polymorphism analysis of the goat growth hormone gene in the 5' regulatory sequence].

The polymorphism of goat growth hormone gene in 5'-region in 274 goats including Lubei white goat, introducted Boer goat, pure bred Boer goat , hybrid generation 1 of LuBei white goat and Boer goat , backcross of hybrid generation 1 and Boer goat were detected by PCR-SSCP with two different pairs of primers. The result showed that in 26-239bp most of the Boer goats and hybrid generation presented as AA genotype,while most LuBei white goats presented as BB genotype. In 225-429bp all breeds presented as more CC genotype. The amplified fragments of AA,BB and CC,DD of the two fragments were cloned and sequenced . The result showed that in 26-239bp AA genotype had one substitution mutation at 60 site (C-->T), and base C losing at 211 site and DD genotype had three substitution mutations at 264 site (T-->C), 292 site (T-->A) and 372 site (C-->T) in 225-429bp. The results above-mentioned first confirmed that there were polymorphisms in 5' region of GH gene.