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.
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
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