Research On Definition Of Breeding Goal And Optimization Of Breeding Scheme For Xinjiang Brown Cattle

In this study, the actual production conditions of Xinjiang brown cattle hasbeen researched, and used the accumulated data of Xinjiang brown cattle production performance, based the current breeding scheme and the market system, estimate the marginal profits of the 10 breeding targets by the Balance method and System method, and using the Gene flow method and selection index method, evaluated the breeding effect of the current scheme by the breeding program software ZPLAN. The influencing factors of breeding results were optimized and analyzed, and the following conclusions were obtained:1. The marginal benefit of 10 breeding objective traits of Xinjiang brown cattle were: Milk Yield(kg) 2.68 yuan, Fat Percentage(%) 9.12 yuan, Protein Percentage(%) 26.9 yuan, Birth Weight(kg) 22.69 yuan, Daily Gain(g)15.57 yuan, Eighteen Month Body Weight(kg) 13.40 yuan, Age at First Calving(day)-12.87 yuan, Calving Interval(day) 18.40 yuan,Somatic Cell Score-289.91 yuan, Productive Life(day) 3.16 yuan.2. The proportion of relative breeding importance in dairy traits and meat traits and functional traits to 36:34:30, approximate in a 1:1:1, the result fit in with the actual production and the breed characteristic of Xinjiang Brown Cattle, reflects the breeding of Xinjiang brown cattle breeding to balance, continue to strengthen its performance and breeding characteristics.3. The expected genetic progress obtained for 130.244 yuan / cow / year by current breeding program of Xinjiang Brown Cattle, the investment was 22.605 yuan / cow / year, breeding profit is 733.57 yuan / cow / year.4. After optimizing the current breeding scheme of Xinjiang brown cattle, the level of each factor is: Active breeding flock proportion is 0.10, the introduction of bull proportion is 0.10, the bull seed life for 2 years, the young bull life for 2 years, seed cow life for 2 years, the general use of seed cow for 4 years, At this time is expected to obtain the largest breeding, The annual genetic progress expected to receive 176.5 yuan / cow / year, the breeding efficiency of 857 yuan / cow / year, breeding output of 921.8 yuan / cow / year, compared with the current breeding programs are higher than 36%, 17% and 22%.