• Title/Summary/Keyword: 산란성적

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농장탐방 - 대산농장(산란계)

  • Im, Seol-Hui
    • KOREAN POULTRY JOURNAL
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    • v.52 no.12
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    • pp.110-113
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    • 2020

  • 채란산업의 불경기가 이어지고 있는 가운데, 농가에서는 수익 창출을 위해서 다양한 방법을 고심하고 있으나, 가장 기본적이며 경쟁력을 높이기 위해서는 좋은 성적을 내는 것이 중요하다. 이에 본지는 산란율 98%를 달성한 전북 고창 소재 다산농장의 김정채 대표를 찾았다.

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Responses in Partial, Residual and Annual Egg Production Expected from Selection on Part Record in Synthetic White Leghorn flock (산란계의 합성종계통에 있어서 부분검정에 의한 선발효과 추정에 관한 연구)

  • 오봉국;이정구;이문연
    • Korean Journal of Poultry Science
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    • v.9 no.1
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    • pp.35-42
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    • 1982

  • Data pertaining to the first generation of a Synthetic White Leghorn flock were used to estimate the heritabilities of and genetic correlation between partial egg production(egg number or percentage) or diversely segmented part records and other traits such as age at sexual maturity, residual and annual egg production, and to compare the expected genetic gain from selection on partial egg number or partial percent production with correlated response in other traits. The estimated heritabilites for six measures of egg Production were ranged from 29 to 35, while heritability for age at sexual maturity (SM) was intermediate (48). Genetic correlations between partial egg number (P) and annual egg number. (A), and partial percent production (P') and annual percent production (A') were 51 and 72, respectively. Genetic correlation between P and SM was estimated largely negative (-.64), while correlation bettween P' and SM was positively intermediate(34). In comparing direct response from selection on partial production (P or P') with another response in correlated trait, selection on P would be 25% more efficient than selection of P' for improving A, while selection of P' would be 94% more efficient than selection P for improving A' For shortening SM selection of P would be 98% more efficient than selection on P'.

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The Relative Economic Importance of Major Production Traits in Laying Hens (산란계에 있어서 주요 형질의 경제적 주요도에 관한 연구)

  • 정선부;홍기창;오봉국
    • Korean Journal of Poultry Science
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    • v.6 no.1
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    • pp.31-37
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    • 1979

  • The propose of the present study was to evaluate the relative economic importance of the major Production traits in laying hens. Based on the results of this study, it was showed that feed requirement, average egg weight and hen-housed e99 Production influenced greatly on the income over feed and chick cost.

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