Recently, there have been many problems with double-ridge hip Belgian white and plus gram white pigs with black sow pigs. Some pig farmers think that breeding pigs are impure or even have claims, lawsuits, etc. In fact, they are not breeding pigs. pure. In the past, the choice of color was very important in breeding. After a long period of breeding, measurement, and test crossing, Changbai and Dabai were all homozygous for the I gene. Since the white gene was dominant, hybrids with the black sow were all white. However, pig breeders are now no longer paying attention to coat color, mainly due to their high production performance and appearance. The existing double-spiny hip-whitish white and kerk DNA assays have found that fluoroalkyl is present, and the body shape is similar to that of Pieter's abnormally developed double-grew hip, indicating that it is a new breed selected after the introduction of Pietrain's blood, and the offspring have a good shape. The high leanness rate, but without the systematic measurement of clearance of heterozygous genes, it is normal for such white boars to cross black sows to produce flower pigs and even a very small number of black pigs. It cannot be judged as impure and impure. Furthermore, as long as its hybrid offspring grow fast, has a high lean percentage, and saves feed, there is no need to calculate its coat color performance.
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