Abstract: Our current project was conducted by using BMPRIB， BMP15 and GDF9 as candidate genes to study the relationship among polymorphisms of BMPRIB， BMP15 and GDF9 and the fecundity in sheep and goat. PCRRFLP was applied to analyze the relationship between the gene and genotype polymorphisms of BMPRIB， BMP15 and GDF9 in four Fujian goat breeds and their prolific trait. The results showed that there was no same mutation in BMPRIB gene of four goat breeds as that of Booroola Merino. The FecXI， FecXH， FecXB of BMP15 and FecGH of GDF9 were not found. The possibility that the fecundity of four goat breeds were affected by the mutations of BMPRIB， BMP15 and GDF9 gene could be ruled out. As we dont know the whole gene sequence of the three genes in four goat breeds， its hard to determine whether these genes affect the fecundity of them.

Key words: BMPRIB, BMP15, GDF9, goat, fecundity trait