Abstract

Reproductive traits were evaluated on first-cross gilts produced by mating Duroc, Meishan, Fengjing, and Minzhu boars to White Composite gilts and in backcross females produced by backcrossing the first-cross gilts to White Composite boars. First-cross Chinese gilts were superior to first-cross Duroc gilts for nearly all of the reproductive traits. Meishan and Fengjing first-crosses had similar reproductive performance and generally had values numerically, but not always statistically, better than Minzhu first-crosses. First-cross breed groups did not differ for Utter size at second parity. As expected, differences in reproduction among backcross breed groups where smaller than among first-cross breed groups. Most differences among backcrosses were not statistically significant but were generally numerically better for backcross Meishan and Fengjing than for backcross Duroc and Minzhu.

L. D Young

Proceedings of the World Congress on Genetics Applied to Livestock Production, Volume 17. Genetics and breeding of dairy and beef cattle, swine and horses, , 335–338, 1994