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Animal Breeding and Genetics
Asian-Australasian Journal of Animal Sciences 2005;18(7): 927-932.
DOI: https://doi.org/10.5713/ajas.2005.927    Published online November 26, 2005.
Investigation of Gene and Microsatellite Heterozygosities Correlated to Growth Rate in the Chinese Meishan Pig
X. P. Jiang, G. Q. Liu, Y. Z. Xiong
Abstract
A total of 130 Chinese Meishan piglets were scored for their genotypes at five gene loci and five microsatellite loci. The average gene heterozygosity was 0.3338 and the average microsatellite heterozygosity was 0.2954, and the heterozygosity of the overall ten loci was 0.3146. The data of birth weight (BW) and body weight on day 35 (W35) were collected, average daily gain (ADG) for each individual was computed as the slope from the regression of weight on age. There was no significant correlation between individual heterozygosity and birth weight (p>0.05). Significant regressions were observed between ADG and the heterozygosity of loci (p<0.01). Similar results were observed in W35 and loci heterozygosity (p<0.01). Heterozygosity at these ten loci explained 43.62% of the total variation in ADG and 45.48% in W35. Significant correlations existed not only in the function of gene loci but also in neutral microsatellite loci, so it indicated that associative overdominance affected piglet growth significantly.
Keywords: Associative Overdominance; Heterozygosity; Growth Trait; Pig


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