Frequencies, Inheritance of Porcine FSH-β Retroposon and its Association with Reproductive Traits

The fragment in intron I of FSH-β gene was amplified by PCR. According to the polymorphism, we analyzed the distribution of FSH-β retroposon in different pig breeds; its inheritance pattern in Large White×Meishan reference family; and the association of FSH-β retroposon with litter size, female reproductive organs measurement, ultrasonic backfat and other traits. The results showed that almost each Chinese indigenous pig had the retroposon, while foreign pig breeds rarely had; the frequencies of porcine FSH-β retroposon were strongly associated with breeds (p