한국가금학회지 (Korean Journal of Poultry Science)

  • 제28권3호
  • /
  • Pages.187-192
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  • 2001
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  • 1225-6625(pISSN)
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  • 2287-5387(eISSN)
한국가금학회 (The Korean Society of Poultry Science)
권호 표지

난황:난백 비율에 의한 닭의 계통형성에 관한 연구

Establishment of Lines Based on the Yolk to Albumen Ratio in Layers

  • 석윤오 (삼육대학교 응용동물학과)
  • 발행 : 2001.12.01
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초록

전체 난중에 대하여 난황의 구성비율이 낮은 저난황란을 생산하는 계통을 선발하고자 29주령, 33주령, 38주령 및 43주령시에 계란의 주요 경제형질들을 측정하였던 바 그 결과를 요약하면 다음과 같다. 시험 시작시인 29주령 전후 연속 3일동안에 생산된 계란들로부터 난황:난백의 비율을 기초로하여 분류된 두 난황군 중 저난황군은 고난황군에 비해서 전체적으로 난중에 대한 난황의 비율 및 난황:난백의 비율은 더 낮고, 난황의 무게는 더 가벼웠던 반면에,평균난중, 난백의 무게 및 난각의 무게는 유의 (P<0.05)하게 더 무거웠다. 각 시험주령 전후 연속 3일 동안에 생산된 계란 상호간 두군 평균 난황:난백 비율의 상관관계는 상당히 높은(P<0.01 ∼ 0.001) 정(+)상관 관계를 나타냈고, 각 란황군별로 4개 시험주령을 합한 전체 평균 난황:난백 비율의 상관관계도 또한 두군 모두 높은 유의성 (P<0.001)을 나타냈다. 난중에 대한 난백의 무게, 난황의 무게 및 난황:난백 비율의 회귀분석의 결과는 두 난황군 모두 난백의 무게는 난황의 무게보다 전체 난중의 변화에 더욱 밀접한 상관관계를 나타냈으며, 전체 난중에 대한 난황:난백 비율의 상관관계는 난중에 대한 난백의 무게 혹은 난황의 무게와의 상관관계보다는 상대적으로 두 난황군 모두 낮은 편이었다.

The repeatabilities on Yolk percentage and yolk to albumen (Y:A) ratio of the eggs produced consecutively were investigated. The differences between two yolk lines in major egg characteristics were also evaluated. The investigations using one hundred ISA-Brown layers were conducted at 29 wk, 33 wk, 38 wk, and 43 wk of age. At the initiated age (29 wk of age) of the experiments, the birds producing eggs with lower or higher Y:A ratio than the overall mean Y:A ratio were classified as Low Yolk Line (LYL) or High Yolk Line (HYL), respectively. Overall, the eggs of LYL were significantly (P<0.05) lighter in yolk weight and lower in yolk percentage for the whole egg weight and Y:A ratio, but heavier in egg weight, albumen weight, and shell weight than those of HYL. The overall mean correlations among the three consecutive laying days in Y:A ratio showed highly significant (P<0.001) in both lines. At four different ages, the mean phenotypic correlation coefficients (r$_{p}$) among the three consecutive laying days in Y:A ratio also had very high significant(P<0.01 ~ 0.001) positive values. The egg weight was more closely associated with albumen weight than with yolk weight in both yolk lines.s.

키워드

참고문헌

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