Abstract

This study was conducted to estimate heritabilities and genetic correlations on egg compositions in Korean Native Ogol Fowl. The date analysis were a total of 58,320 eggs in 450 pullets producted from 150 dams and 20 sires of Korean Native Ogol Fowl raised at Chungnam National University from June 18. 1987 to April 6. 1989. The results obtained are summarized as follows： 1. On the egg compositions, the albumen weight at first egg, 300 and 500 days were $24.003\pm$2.499, $28.354\pm$2.755 and $31.863\pm$3.341g； the yolk weight were $10.272\pm$1.536, $16.346\pm$1.321 and $19.212\pm$1.661g： the shell weight were $3.906\pm$0.414, $4.336\pm$0.506 and $4.822\pm$0.515g, respectively. 2. The heritability estimates of egg compositions based on the valiance of sires, dams and combined components were 0.620-0.723, 0.206-0.300 and 0.413-0.511 for albumin weight；0.439-0.737, 0.484-0.544 and 0.492-0.615 for yolk weight：0.172-0.187, 0.412-0.642 and 0.390-0.503 for shell weight, respectively. 1. The genetic and phenotypic correlation coefficients of egg compositions were as follows； The coefficients between albumen weight and yolk weight were 0.089-0.654 and 0.084-0.255；between albumen weight and shell weight were 0.396-0.925 and 0.225-0.544； between yolk weight and shell weight were 0.227-0.357 and 0.098-0.358 respectively.

본 연구는 전국재래오골계의 난구성분에 대한 유전력 및 유전상관을 추정하여 닭의 효율적인 개량을 위한 육종목표의 설정과 선발을 수행하는데 필요한 기초자료를 얻고자 충남대학교 농과대학 동물사육장에서 1987년 6월 18일부터 1989년 4월 6일까지 500일동안 부가계 20수와 모가계 150수에서 생산된 450수 자손으로부터 계란 58,320개의 난구성분을 조사하여 얻어진 결과는 다음과 같다. 1. 난구성분중에서 초산시, 300일영 및 500일영시의 난백중은 각각 $24.003\pm$2.499, $28.345\pm$2.755 및 $31.636\pm$3.341g이었고, 초산시, 300일영 및 500일영시의 난황중에 있어서는 각각 $10.272\pm$1.536, $16.346\pm$1.321 및 $19.212\pm$1.611g이었고, 초산시, 300일영 및 500일영시의 난각중은 각각 $3.906\pm$0.414, $4.336\pm$0.506 및 $4.822\pm$0.515g이었다. 2. 난구성분의 유전역 추정치는 부분산성분, 모분산성분 및 부모분산성분에서 난백중은 각각 0.620~0.723, 0.206~0.300 및 0.413~0.511이었고, 난황중은 0.439~0.737, 0.484~0.737 및 0.516~0.615이었으며, 난각중에서는 각각 0.172~0.387, 0.412~0.642 및 0.309~0.503이었다. 3. 난구성분간의 유전상관 및 표현형상관은 난백중과 난자중간에 각각 0.089~0.654, 0.984~0.235 이었고, 난백중과 난각중간에는 각각 0.396~0.925, 0.225~0.544이었으며, 난황중과 난각중간에는 각각 0.227~0.375, 0.098~0.358이었다.

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