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RISS 인기검색어
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- 저자 : 羅鍾三 (검색결과 1 건)
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李成哲,羅鍾三 又石大學校 1991 論文集 Vol.13 No.-
This study was conducted to estimate the heritabilities, and genetic and phenotypic correlations on economically important traits in Swine. The data used in this study were obtained from 5,724 herds of Duroc, Landrace and Yorkshire breed tested on a weight-constant basis a S Swine Breeding Farm at Icheon, Kyunggi Do from August 1985 to August 1990. The traits studied were backfat thickness, average daily gain, age at 90㎏ and 154day weight. The results obtained in this study were as follows: 1. The least-squares overall means of the backfat thickness studied were 1.960㎝, 1.517㎝ and 1.903㎝ for Duroc, Landrace and Yorkshire, respectively. Landrace is superior to the other breed in backfat thickness. The Duroc were 148.4 for age at 90㎏, 0.868 for average daily gain and 95.9㎏ for 154day weight, respectively and was superior to the other breeds. 2. The heritabilities of the backfat thickness by sire variance component were 0.383 for Duroc, 1.071 for Landrace and 0.879 for Yorkshire, respectively. The growth traits in Duroc were 0.352, 0.373 and 0.335 and in Landrace were 0.917, 0.616 and 0.907 and in Yorkshire were 0.314, 0.331 and 0.341 for average daily gain, age at 90㎏ and 154 day weight, respectively. 3. The genetic correlations of backfat thickness with 154 day weight and average daily gain were positive correlation in Duroc and Landrace breed, and in Yorkshire breed were negative correlation. The phenotypic correlations of back-fat thickness with average daily gain are positive correlation, and age at 90㎏ were negative correlation.
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