China's goats are rich in resources, and the amount of goats raised ranks first in the world. Many local breeds are of the same species and have low meat production performance. To improve the meat performance of local goats, hybridization is one of the effective ways. The hybrid sheep produced by the hybrid has the advantages of strong viability, rapid growth and development, high feed repayment, and high product rate, and is a means for efficiently producing mutton. (I) Main Hybridization Methods l Dual-breeding Crossbreeding of exotic varieties with foreign goats and local goats. The Boer goat is the first to be promoted in exotic meat goats. This breed is considered to be the best meat goat breed in the world. It is not only large in size, but also has a high growth rate, good meat performance, and strong adaptability and high fertility. The effect of crossbreeding is remarkable. According to reports, the Boer goats were crossed with Anhui white goats, and the hybrid sheep had a body weight of 25.2 kg at the age of 6 months, which was 119.9% ​​higher than the 11.46 kg of local goats. The Boer goats crossed with the Yangtze River Delta white goats. The hybrid sheep weighed 25.45 kilograms for 259 days, which was 7.5 kilograms more than that of the local goats during the same period, an increase of 41.78%. The crossbreed of Boer goats and goats, and the weight of the 4 months old lambs of the hybrid generation can reach 21.71 kg. The Boer Goat crossed with the Lubei White Goat and the mixed-generation goat was 6 months old. The weight of the ram was 33.97 kg, which was 95.91% higher than that of the Lubei White Goat during the same period. The cross between Boer goats and Yichang white goats in Hubei province was 23.9 kilograms at 5 months old, which was 81.1% higher than the 13.2 kilograms of local goats. The Boer goats were crossed with the goats from the Renshou County of Sichuan. The hybrid generation had a weight of 34.4 kg at 6 months of age, which was 106.76% higher than the local goats' 16.67 kg. 2. Ternary hybridization uses two exotic improved goat breeds and local goats to cross three breeds, and the resulting three-way hybrid male and female ram and two-way hybrid ram are all fattened and marketed. The heterosis of three-way hybrids generally exceeds that of binary crossbreeding, because three-way hybrids use the heterosis of a generation of hybrid ewes in terms of viability and fertility. Domestic research on the three-way hybridization of meat goats does not have much binary hybridization. According to reports, the first male parent uses a dairy goat breed, and the second father uses a thoroughbred meat goat breed and a local goat to carry out a three-way hybrid with good results. For example, the hybrid combination "Possabben" (Sazhisengengeng Goat) screened for Anhui, and the crossbreed "Bonuben" (Nuoyinubibi Goat) screened for Hubei, the hybrid combination "Masabben" screened for Zhejiang (The horse refers to the horse head goat). (b) Matters needing attention in hybridization 1. Whether or not the hybrid sheep has advantages and sizes depends on the quality of the cross-breeding parent group and whether the cross combination is appropriate. The hybridization effect between different meat goat breeds differs greatly. In order to obtain a good hybridization effect, hybridization combinations need to be performed. Determination of combining ability. 2. Hybrid sheep have a faster growth and development rate and therefore require better feed-feeding conditions than local sheep, otherwise their heterosis is difficult to show. 3. In the crossbreeding, the protection of local goat breed resources must be taken into consideration, and the hybrid improvement cannot be carried out in the national goat breeding area protected areas. 4. Cross-breeding should be based on crossbreeding combinations to establish hybrid breeding systems.
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