樱桃谷鸭与不同地方品种鸭经济杂交后代生产性能比较
[Abstract]:In the breeding of high-quality ducks in China, there is little research on the cross between fast-growing ducks and local duck breeds in China, and there is little research on the cross-breeding model and economic benefits. The selection of parents, the comparison of their combinations and the production performance of their offspring will provide reference for the development of high-quality meat ducks in China. 1. Selection of hybrid fathers. Three candidate fathers were introduced: Cherry Valley duck (fast-growing, white-feathered), Guangdong flax duck (fast-growing, flax-feathered) and Chongqing white duck (medium-sized, white-feathered). The results showed that it took 29 days for Cherry Valley duck to grow to the weight of the duck, and the feed-to-meat ratio was 1.66; Guangdong meat-to-meat ratio was 1.98; Chongqing white duck was 53 days and the feed-to-meat ratio was 2.70; there was no significant difference in slaughter performance between Guangdong meat-to-meat duck and Chongqing white duck (P 0.05), which was significantly higher than Cherry Valley duck (P 0.05). The combined analysis showed that Cherry Valley duck grew fast in the early stage, had high feed reward, and had good economic benefit. Therefore, Cherry Valley duck was selected as the hybrid male parent. 2. Screening of hybrid female parent. The growth and production performance of hybrid female parent (Jinding duck, Youxian Ma duck, Putian black duck, Shaoxing duck) were determined. The body weight of ducks increased fastest, the birth weight, 105-day weight and 300-day weight of ducks were significantly higher than those of other laying ducks (P 0.01), Youxian Ma Duck was the smallest, and 300-day weight was significantly lower than that of other laying ducks (P 0.01). Putian black duck and Shaoxing duck were significantly different (P 0.01); the feed-to-egg ratio of Youxian Ma duck and Jinding duck were not significantly different (P 0.05) during the peak laying season, which were significantly less than Shaoxing duck and Putian black duck (P 0.01). Youxian Ma duck had the best egg-laying performance and Jinding duck laying performance was slightly lower than Youxian Ma duck, but the egg weight of Jinding duck was significantly higher than other laying ducks. Variety (P 0.01), and the proportion of green shell was the highest.3. Artificial insemination was used to solve the problem of difficult mating between Cherry Valley Duck and laying duck breeds. After the first day of insemination, the fertilization rate of breeding eggs in Youxian was 86.24%, which was significantly higher than that of Putian black duck 71.63%(P 0.05). The growth, slaughter performance and meat quality of offspring from different cross combinations were tested. The results showed that the growth rate of offspring from different cross combinations was between their parents, which was much higher than that of their parents. The offspring from different cross combinations weighed 2.3-2.4 kg and the ratio of feed to meat was 2.7-2.8, and the survival rate was high when they were fed for 45 days. Except for the offspring of Cherry Valley duck, the slaughter performance of other hybrid offspring was better than Cherry Valley duck. The weight gain of the offspring of each group tended to be gentle after 70 days, and the muscle fat content and tenderness were significantly better than Cherry Valley duck (P 0.01), and the breast muscle protein content was higher than Cherry Valley duck, and the meat quality was better.5. The hybrid offspring of Cherry Valley duck and Jinding duck had the highest 45-day survival rate, the largest live weight, the lowest feed-meat ratio and the highest total clean-hearted rate. At the same time, the fertilized eggs had the highest hatching rate, and the hybrid female parent Jinding duck had good egg-laying performance, and the Green-shell duck eggs were more popular in the market.
【学位授予单位】:扬州大学
【学位级别】:硕士
【学位授予年份】:2017
【分类号】:S834
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