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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2016.12
- 수록면
- 1 - 7 (7page)
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Background: Over two decades of observations in the field in South East Asia and Hawai‘i suggest that majority of the commercial dairy herds are of black hair coat. Hence a simple study to determine the accuracy of the observation was conducted with two large dairy herds in Hawaii in the mid-1990s.
Methods: A retrospective study on longevity of Holstein cattle in the tropics was conducted using DairyComp-305 lactation information coupled with phenotypic evaluation of hair coat color in two large dairy farms. Cows were classified into 3 groups: a) black (B, >90%); b) black/white (BW, 50:50) and c) white (W, >90%). Cows with other hair coat distribution were excluded from the study. In farm A, 211 out of 970 cows were identified having 4 or more lactations. In farm B, 690 out of 1,350 cows were identified with 2 or more lactations for the study.
Results: The regression analyses and the Wilcoxon-Log-rank test for survival probability showed that Holstein cattle with 90% black hair coat had greater longevity compared to Holstein cattle with 90% white hair coat.
Conclusions: This study suggests that longevity of Holstein cattle in tropical regions was influenced by hair coat color and characteristics.
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참고문헌 (33)
참고문헌 신청
Andersen DE / 1991 / Genetic study of eye cancer in cattle / J Hered 82(1):21~26
Becerril CM / 1993 / Effects of percentages white coat color on Holstein production and reproduction in a subtropical environment / J Dairy Sci 76:2286~2291
Briquet R / 1947 / Heritability of amount of sporting in Holstein-Fresian cattle / J Hered 38:99~105
Climate Change / Consensus
Ebi KL / The heat is on: climate change and heat waves in the midwest
Becerril CM / 1993 / Effects of percentages white coat color on Holstein production and reproduction in a subtropical environment / J Dairy Sci 76:2286~2291
Briquet R / 1947 / Heritability of amount of sporting in Holstein-Fresian cattle / J Hered 38:99~105
Climate Change / Consensus
Ebi KL / The heat is on: climate change and heat waves in the midwest
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