Download the full-sized PDF of Inbreeding and Genetic Diversity in Three Imported Swine Breeds in China Using Pedigree DataDownload the full-sized PDF



Permanent link (DOI):


Export to: EndNote  |  Zotero  |  Mendeley


This file is in the following communities:

Roy Berg Kinsella Research Ranch


This file is in the following collections:

Journal Articles (Kinsella Ranch)

Inbreeding and Genetic Diversity in Three Imported Swine Breeds in China Using Pedigree Data Open Access


Author or creator
Tang, G. Q.
Xue, J.
Lian, M. J.
Yang, R. F.
Liu, T. F.
Zeng, Z. Y.
Jiang, A. A.
Jiang, Y. Z.
Zhu, L.
Bai, L.
Wang, Z.
Li, X. W.
Additional contributors
genetic diversity
Type of item
Journal Article (Published)
The accumulation of inbreeding and the loss of genetic diversity is a potential problem in the modern swine breeds in China. Therefore, the purpose of this study was to analyze the pedigrees of Chinese Duroc (CD), Landrace (CL) and Yorkshire (CY) swine to estimate the past and current rates of inbreeding, and to identify the main causes of genetic diversity loss. Pedigree files from CD, CL and CY containing, 4529, 16,776 and 22,600 records, respectively, were analyzed. Pedigree completeness indexes of the three breeds, accounting for one generation back, were 83.72, 93.93 and 93.59%, respectively. The estimated average annual inbreeding rates for CD, CL and CY in recent three years were 0.21, 0.19 and 0.13%, respectively. The estimated average percentage of genetic diversity loss within each breed in recent three years was about 8.92, 2.19, and 3.36%, respectively. The average relative proportion of genetic diversity loss due to unequal contributions of founders in CD, CL and CY was 69.09, 57.95 and 60.57%, and due to random genetic drift was 30.91, 42.05 and 39.43%, respectively. The estimated current effective population size for CD, CL and CY was 76, 117 and 202, respectively. Therefore, CD has been found to have lost considerable genetic diversity, demanding priority for optimizing the selection and mating to control future coancestry and inbreeding. Unequal contribution of founders was a major cause of genetic diversity loss in Chinese swine breeds and random genetic drift also showed substantial impact on the loss of diversity.
Date created
License information
@2013 Tang, G. Q., Xue, J., Lian, M. J., Yang, R. F., Liu, T. F., Zeng, Z. Y., Jiang, A. A., Jiang, Y. Z., Zhu, L., Bai, L., Wang, Z., Li, X. W. This version of this article is open access and can be downloaded and shared. The original author(s) and source must be cited.
Citation for previous publication
Tang, G. Q., J. Xue, M. J. Lian, R. F. Yang, T. F. Liu, Z. Y. Zeng, A. A. Jiang, Y. Z. Jiang, L. Zhu, L. Bai, Wang, Z., X. W. Li. (2013). Inbreeding and Genetic Diversity in Three Imported Swine Breeds in China Using Pedigree Data. Asian-Australasian Journal of Animal Science, 26(6), 755-765.

Link to related item

File Details

Date Uploaded
Date Modified
Audit Status
Audits have not yet been run on this file.
File format: pdf (Portable Document Format)
Mime type: application/pdf
File size: 524781
Last modified: 2016:06:24 18:07:45-06:00
Filename: aajas_26_6
Original checksum: ea3130db02652d3afc9215b9ad83b59e
Well formed: true
Valid: true
File title: Effects of the Pattern of Energy Supply on the Efficiency of Nitrogen Utilization for Microbial Protein Synthesis in the Non-L
File author: Taegu Ko
Page count: 11
File language: ko-KR
Activity of users you follow
User Activity Date