Abstract
Restriction enzyme cleavage patterns of mitochondrial DNA of the three Chinese breeds, Meishan, Jinhua, and Northeast Minzhu, were compared with those of Landrace and Large White. Preparations of mitochondrial DNA were obtained from fresh testes and digested with nine restriction enzymes, Apa I, Bam HI, Bgl II, Dra I, Eco RI, Eco EV, Pst I, Sca I, and Stu I. The three Chinese breeds showed identical cleavage patterns with all the enzymes, but the patterns of Bgle II, Sca I and Stu I of the Chinese breeds were obviously different from those of Landrace and Large White. Another difference in the Bgl-II patterns was found out between Landrace and Large White pigs. The patterns of cleavage in the Chinese breeds used in the present study are assumed to be probably the same as those of the Japanese wild pigs and Taiwanese native breeds investigated by WATANABE et al.13, 14).
