廖仁寶 賴永裕 吳明哲 黃鈺嘉 張秀鑾
ASSOCIATION STUDY BETWEEN MICROSATELLITE
MARKERS ON SWINE
CHROMOSOME 6 AND THE LITTER PERFORMANCE OF PAROUS SOWS
R. B. Liaw, Y. Y. Lai, M. C. Wu, Y. C. Huang and H. L. Chang
Livestock Research Institute, Council of Agriculture, Executive Yuan
A total of ten microsatellite markers averagely spread on swine chromosome 6 (SSC6) were used to genotype 242 parous sows, including Landrace, Yorkshire, Durco and Berkshire breeds. These markers spanned about 166 cM on the linkage map of SSC6. Three traits including litter size at birth and born alive as well as the corresponding survivability of piglets were considered in the study. Result indicated that there was significant breed effects existed in the distribution of allele frequency for all markers analyzed. The general linear model via least-squared method was further applied to study the relationship between litter performances described above and the presence of individual allele for parous sows in Landrace, Yorkshire and Duroc breeds. Both positive and negative effects of alleles on sows’ litter performances were observed. For example, the marker-allele groups (S0099-B7and SW1881-B15), (SW1129-B1), and (W2406-B1, SW1881-B6 and S0099-B5) were beneficial for Landrace, Yorkshire and Duroc sows, respectively. However, alleles with inferior effects on sows’ litter performances were also found in this study.
Key Words: Microsatellite marker, Allele, Litter performance.