Journal of Integrative Agriculture ›› 2016, Vol. 15 ›› Issue (4): 848-854.DOI: 10.1016/S2095-3119(15)61155-8

• 论文 • 上一篇    下一篇

Heritabilities and genetic and phenotypic correlations of litter uniformity and litter size in Large White sows

ZHANG Tian*, WANG Li-gang*, SHI Hui-bi, YAN Hua, ZHANG Long-chao, LIU Xin, PU Lei, LIANG Jing, ZHANG Yue-bo, ZHAO Ke-bin, WANG Li-xian   

  1. Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation, Ministry of Agriculture/Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, P.R.China
  • 收稿日期:2015-03-17 出版日期:2016-04-01 发布日期:2016-04-07
  • 通讯作者: WANG Li-xian, Tel: +86-10-62816011, Fax: +86-10-62818771, E-mail: iaswlx@ 263.net; ZHAO Ke-bin, Tel: +86-10-62816011, Fax: +86-10-62818771, E-mail: iaszkb@sina.com
  • 作者简介:ZHANG Tian, E-mail: lffmsfe@126.com; WANG Li-gang, E-mail: wangligang01@caas.cn;
  • 基金资助:

    This research was supported by the Agricultural Science and Technology Innovation Program, China (ASTIP-IAS02), the National Key Technology R&D Program of China (2011BAD28B01), the National Natural Science Foundation of China (31201781), the earmarked fund for Modern Agro-Industry Technology Research System, China (2011ZX08006-003), and the Chinese Academy of Agricultural Sciences Foundation (2014ZL006, 2011cj-5, 2012ZL069 and 2014ywf-yb-8).

Heritabilities and genetic and phenotypic correlations of litter uniformity and litter size in Large White sows

ZHANG Tian*, WANG Li-gang*, SHI Hui-bi, YAN Hua, ZHANG Long-chao, LIU Xin, PU Lei, LIANG Jing, ZHANG Yue-bo, ZHAO Ke-bin, WANG Li-xian   

  1. Key Laboratory of Farm Animal Genetic Resources and Germplasm Innovation, Ministry of Agriculture/Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, P.R.China
  • Received:2015-03-17 Online:2016-04-01 Published:2016-04-07
  • Contact: WANG Li-xian, Tel: +86-10-62816011, Fax: +86-10-62818771, E-mail: iaswlx@ 263.net; ZHAO Ke-bin, Tel: +86-10-62816011, Fax: +86-10-62818771, E-mail: iaszkb@sina.com
  • About author:ZHANG Tian, E-mail: lffmsfe@126.com; WANG Li-gang, E-mail: wangligang01@caas.cn;
  • Supported by:

    This research was supported by the Agricultural Science and Technology Innovation Program, China (ASTIP-IAS02), the National Key Technology R&D Program of China (2011BAD28B01), the National Natural Science Foundation of China (31201781), the earmarked fund for Modern Agro-Industry Technology Research System, China (2011ZX08006-003), and the Chinese Academy of Agricultural Sciences Foundation (2014ZL006, 2011cj-5, 2012ZL069 and 2014ywf-yb-8).

摘要: Litter uniformity, which is usually represented by within-litter weight coefficient of variation at birth (CVB), could influence litter performance of sows and the profitability of pig enterprises. The objective of this study was to characterize CVB and its effect on other reproductive traits in Large White sows. Genetic parameters and genetic correlation of the reproductive traits, including CVB, within-litter weight coefficient of variation at three weeks (CVT), total number born (TNB), number born alive (NBA), number born dead (NBD), gestation length (GL), piglet mortality at birth (M0), piglet mortality at three weeks (M3), total litter weight at birth (TLW0), and total litter weight at three weeks (TLW3) were estimated for 2 032 Large White litters. The effects of parity and classified litter size on CVB, CVT, TNB, NBA, NBD, GL, M0, M3, TLW0, and TLW3 were also estimated. The heritabilities of these reproductive traits ranged from 0.06 to 0.17, with the lowest heritability for CVB and the highest heritability for TLW0. Phenotypic and genetic correlations between these reproductive traits were low to highly positive and negative (ranging from −0.03 to 0.93, and −0.53 to 0.93, respectively). The genetic correlations between TNB and CVB, and between M0 and CVB were 0.32 and 0.29, respectively. In addition, CVB was significantly influenced by parity and litter size class (P<0.05). All the results suggest that piglet uniformity should be maintained in pig production practices and pig breeding programs.

关键词: genetic parameter , litter uniformity , litter size , piglets mortality

Abstract: Litter uniformity, which is usually represented by within-litter weight coefficient of variation at birth (CVB), could influence litter performance of sows and the profitability of pig enterprises. The objective of this study was to characterize CVB and its effect on other reproductive traits in Large White sows. Genetic parameters and genetic correlation of the reproductive traits, including CVB, within-litter weight coefficient of variation at three weeks (CVT), total number born (TNB), number born alive (NBA), number born dead (NBD), gestation length (GL), piglet mortality at birth (M0), piglet mortality at three weeks (M3), total litter weight at birth (TLW0), and total litter weight at three weeks (TLW3) were estimated for 2 032 Large White litters. The effects of parity and classified litter size on CVB, CVT, TNB, NBA, NBD, GL, M0, M3, TLW0, and TLW3 were also estimated. The heritabilities of these reproductive traits ranged from 0.06 to 0.17, with the lowest heritability for CVB and the highest heritability for TLW0. Phenotypic and genetic correlations between these reproductive traits were low to highly positive and negative (ranging from −0.03 to 0.93, and −0.53 to 0.93, respectively). The genetic correlations between TNB and CVB, and between M0 and CVB were 0.32 and 0.29, respectively. In addition, CVB was significantly influenced by parity and litter size class (P<0.05). All the results suggest that piglet uniformity should be maintained in pig production practices and pig breeding programs.

Key words: genetic parameter , litter uniformity , litter size , piglets mortality