The polymorphisms of exon 2 of GOLA-DQA2 gene were analyzed by PCR-RFLP technique in Laiwu black goats, Lubo goats, and Boer goats; and the effects of genotypes of GOLA-DQA2 gene on blood immune traits were esti-mated. The results showed that four genotypes were detected in the three goats. Polymorphic sites were detected at base positions 77, 79, 80, and 169 in exon 2 of GOLA-DQA2 gene. The effects of breed were major effect. In Lubo goats, red blood count (RBC) with genotype AB was significantly higher than that with genotype BB (P<0.05), and white blood count (WBC) with genotype AB was significantly higher than that with genotype BC (P<0.05). Hematocrit (HCT) in Lubo goats with genotype AB was significantly higher than that with genotypes BB and BC (P<0.05). WBC-large cell ratio (W-LCR) in Lubo goats with genotype BC was significantly higher than that with genotype BB (P<0.05). In Laiwu black goats and Boer goats, there was certain degree of association between genotypes and blood immune traits, but it was not significant. Genotype AB and BC was an important factor affecting RBC, WBC, W-LCR, and so on. It was concluded from these results that GOLA-DQA2 was the gene affecting the blood immune traits, which provides a basis for disease resistance breeding of goats.
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