湘村黑猪繁殖性能分析研究

发布时间：2018-02-14 20:12

本文关键词： 湘村黑猪繁殖性能育成率　出处：《湖南农业大学》2015年硕士论文　论文类型：学位论文

【摘要】：本文采用湘村黑猪种猪场完整的育种资料及其扩繁群资料,对湘村黑猪繁殖性能和遗传参数进行了分析研究,为进一步了解和研究湘村黑猪繁殖性能提供理论与技术支撑,同时也为我国猪新品种培育和遗传育种学理论与实践积累了经验。研究结果表明：1、湘村黑猪是具有较高产仔性能的培育猪种,初产与经产的总产仔数分别为11.11头和13.18头；活产仔数分别为10.32头和12.86头。2、湘村黑猪21日龄育成仔数,初产9.86头、经产12.14头；育成率,初产95.90%、经产95.68%；21日龄窝重,初产42.03kg、经产56.06kg。3、湘村黑猪生长发育快,初产和经产70日龄的个体重分别为18.25kg和19.76kg,其窝重分别为172.29kg和232.91kg。4、运用Y=Xb+Zu+Wm+Slpe+S2tm+e模型,获得湘村黑猪总产仔数(TNB)、产活仔数(NBA)、初生窝重(LWB)、21日龄窝重(LW21)4个繁殖性状的遗传力范围为0.07-0.18,其母体效应范围为0.07-0.11,其窝效应范围为0.14-0.33。5、湘村黑猪新品种选育主要采用常规育种技术,其高繁殖力的种质特性源于亲本组群时母本品种窝仔数14头以上仔母猪的选择及各世代高产母猪后代的选择和高产个体的世代重叠。因此,对高产亲本后代的选择及高产个体的世代重叠,是常规育种中提高繁殖性能的重要手段之一。6、建立在剔除出生12小时内未获得体重调查即已死亡基础上的育成率以完整的活产仔数为基数的育成率,初产、经产21日龄、70日龄分别提高了6.21个、6.03个、1.29个和1.24个百分点,由此体现了加强管理减少活仔初生时死亡的重要性。
[Abstract]:Based on the complete breeding data of Xiangcun black pig breeding farm and its propagation data, the reproductive performance and genetic parameters of Xiangcun black pig were analyzed and studied in this paper, which provided theoretical and technical support for further understanding and study of Xiangcun black pig reproductive performance. At the same time, it has accumulated experience for the breeding of new breeds of pigs and the theory and practice of genetics and breeding in China. The results show that Xiang cun black pig is a breeding breed with higher litter performance, with 11.11 and 13.18 piglets born at the beginning and after birth, respectively. The number of live piglets was 10.32 and 12.86 respectively. The number of black pigs in Xiangcun was 9.86 at 21 days of age and 12.14 in the first day, and the breeding rate was 95.90, the first birth weight was 42.03 kg and the first production was 56.06 kg. 3, and the growth rate of Xiangcun black pig was faster than that of Xiangcun Black Pig, the first birth rate was 95.90, the first birth weight was 42.03 kg, the first birth was 42.03 kg, and the first production was 56.06 kg 路3, respectively. The body weight of the first and last 70 days was 18.25 kg and 19.76 kg, respectively. The litter weight was 172.29 kg and 232.91 kg 路4, respectively. The YXb Zu Wm Slpe S2tm e model was used. The heritability of the four reproductive traits were 0.07-0.18, 0.07-0.11, 0.07-0.11 and 0.14-0.33.5respectively. The breeding of new black pig varieties in Xiangcun was mainly by conventional breeding technique, while the total litter size of Xiangcun black pig was TNBN, the number of live piglets was NBAA, and the litter weight of LWW21 was 21 days old. The heritability of four reproductive traits were 0.07-0.18, 0.07-0.11 and 0.14-0.33.5respectively. The germplasm characteristic of its high fecundity stems from the selection of litter size of 14 or more litter sows and the selection of offspring of high-yielding sows and the overlapping of generations of high-yielding sows in the parent group. The selection of high-yielding parents and progenies and the overlapping of generations of high-yielding individuals, It is one of the important means to improve reproductive performance in conventional breeding. The breeding rate based on the complete number of live offspring, which is based on the complete number of live offspring, is established on the basis of eliminating birth weight survey within 12 hours of birth. The age of 70 days of delivery increased by 6.21, 6.03, 1.29 and 1.24 percentage points respectively, which showed the importance of strengthening management to reduce the death of live litter at birth.
【学位授予单位】：湖南农业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：S828

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