Abstract: The follicle\|stimulating hormone β submit gene （FSHβ）， estrogen receptor gene （ESR） and prolactin receptor gene （PRLR） of Erhualian pigs were investigated using PCR and PCR\|RFLP. The results showed that only AA and AB genotypes were found for FSHβ gene， and AA， AB and BB genotypes were found for ESR and PRLR genes. Pigs with AA genotype for FSHβ had more total number born （TNB） and number born alive （NBA） than AB ones （P<005 or P<001）. Pigs with BB genotype for ESR had more TNB and NBA than AB （P<005） and AA ones （P<001）. Pigs with AA and AB genotypes for PRLR gene had more TNB and NBA than BB ones （P<001）. In the aspect of birth weight （BW） and weaning weight （WW） traits， pigs with AB genotype for FSHβ had higher BW and WW than AA ones （P>005） in the first and multiparity. Pigs with AA genotype for ESR had higher BW than AB and BB ones （P<005）， and had higher WW than BB ones （P<005） in the first and multiparity. Pigs with BB genotype for PRLR had higher WW than AA ones （P<005） in the first and multiparity. FSHβ， ESR and PRLR genes had certain effects on the reproductive traits of Erhualian pigs， so genetic polymorphism of these genes could be used as important genetic markers to study reproductive traits of Erhualian pigs.

Key words:  Erhualian pig, FSH&beta, gene; , ESR gene, PRLR gene