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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2015.9
- 수록면
- 245 - 251 (7page)
이용수
초록· 키워드
오류제보하기
Records of 490,767 cows collected from 1990 to 2012 by dairy herd milk test of National Agriculture Cooperative Federation The pedigree of dairy cattle were provided by Korea Animal Improvement Association. The data were used to analyze the longevity of dairy cows with the life traits such as days in milk, number of lactation, productive life, and life span. The data were also used to investigate genetic relationship of these longevity traits with profitability of dairy cows, including heritability and genetic correlation. The profitability was calculated with simulation of milk income and production costs for individual cows. Days in milk among the traits had ?0.287, -0.572 and ?0.536 of genetic correlation with number of lactations, productive life and lifespan, respectively. The heritabilities of life span, number of lactations, productive life, and days in milk were found to be 0.045, 0.047, 0.059 and 0.081, respectively. Genetic correlations of profit with productive life, number of lactations, and days in milk were identified as 0.072, 0.080, 0.098 and 0.101. These results suggested that days in milk was most desirable traits to represent longevity of Holstein dairy cattle. In general, since longevity and profitability were close genetic relationship each other, genetic improvement of longevity is necessary for better profitable cows.
목차
Abstract
I. 서론
II. 재료 및 방법
III. 결과 및 고찰
IV. 요약 및 결론
참고문헌
참고문헌 (12)
참고문헌 신청
[학술지(정기간행물)] - 도창희 / 2013 / 국내 Holstein종 젖소의 생산수준이 젖소의 수익형질에 미치는 효과 / 한국동물자원과학회지 55 (5) : 343 ~ 349
[학술대회논문] - Ducrocq, V / 1998 / The Survival Kit, V3.12: A package for large analyses of survival data / Proc. 6th World Congr. Genet, Appl. Livest. P : 447 ~ 450
[학술지(정기간행물)] - Forabosco, F. / 2008 / International genetic evaluation for direct longevity in dairy bulls / J. Dairy Sci 92 : 2338 ~ 2347
[학술지(정기간행물)] - Gaalaas., R. F / 1962 / Relationship between longevity and production in Holstein-Fresian cattle / J. Dairy Sci 46 : 27 ~
[인터넷자원] - KDC / / Korea dairy statistics yearbook
[학술대회논문] - Ducrocq, V / 1998 / The Survival Kit, V3.12: A package for large analyses of survival data / Proc. 6th World Congr. Genet, Appl. Livest. P : 447 ~ 450
[학술지(정기간행물)] - Forabosco, F. / 2008 / International genetic evaluation for direct longevity in dairy bulls / J. Dairy Sci 92 : 2338 ~ 2347
[학술지(정기간행물)] - Gaalaas., R. F / 1962 / Relationship between longevity and production in Holstein-Fresian cattle / J. Dairy Sci 46 : 27 ~
[인터넷자원] - KDC / / Korea dairy statistics yearbook
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UCI(KEPA) : I410-ECN-0101-2016-480-001947341