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난황 Cholesterol 의 유전적 무수에 관한 White Leghorn 두 계통간의 비교
박응우(E . W . Park),김형주(H . J . Kim),홍기창(K . C . Hong),정선부(S . B . Chung) 한국축산학회 1992 한국축산학회지 Vol.34 No.3
This study was conducted to obtain basic material for breeding a line with low yolk cholesterol content. We used three eggs of two lines of White Leghorn (F, Y) that were continously laid at 500 days of age. Yolk cholesterol content was measured in 24.55 ㎎/g dry yolk (F line) and 25.07 ㎎/g dry yolk (Y line) at 500 days of age. Heritability from the sire component of variance was 0.256 (F line) and 0.325 (Y line) and from the sire + dam component of variance was 0.469 (F line) and 0.567 (Y line) at 500 days of age. Estimates of phenotypic correlation between yolk cholesterol and other factors such as age at first eggs, 500-days total egg number, 500-days body weight, 500-days egg weight and 500-days yolk weight were -0.07, -0.041. - 0.064, 0.158 and -0.043, respectively (F line) and were -0.066, -0.008, 0.155, 0.022 and -0.077, respectively (Y line). And genetic correlation coefficients for each item in the order were -0.176, -0.022, 0.074, 0.301 and -0.610. respectively (F line) and were -0.299, -0.154. -0.207, 0.612 and -0.678, respectively (Y line). There was no difference between F and Y in the content of egg yolk cholesterol, but confirmed difference in heritability. Therefore the medium heritabilities in the two lines confirm the possibility of selection for lower yolk cholesterol.
김태헌,윤두학,최승철,박응우,이영창,이장형,조진기 ( T . H . Kim,D . H . Yoon,S . C . Choi,E . W . Park,Y . C . Lee,J . H . Lee,J . K . Jo ) 한국축산학회 1997 한국축산학회지 Vol.39 No.3
The purpose of this study was to investigate differences in restriction fragment length polymorphisms between mitochondrial DNAs(mtDNA) of Korean native pig and Landrace and to construct restriction map of the mtDNA of Korean native pig. When the mtDNA were digested with 16 different restriction enzymes of Apa I, Ava I, Barnes I, Bgl I, Bgl II, Cla I, EcoR I, EcoRV, Hind III, Hpa I, Pst I, Pvu II, Sac I, Sca I, Stu I and Xba I, to recognize 6 specific base pairs, restriction patterns of all the enzymes except for Bgl B and Sca I were identical between the two breeds. When digested with Bgl B and Sca I, seven out of ten Korean native pigs showed different band patterns from those of Landrace, but the other three showed the same patterns as those of Landrace. While five BamH I restriction fragments were reported in literature, the seven fragments were detected in this study. The restriction map of Korean native pig mitochondrial genome with 28 cleavage sites of 8 different restriction enzymes was constructed.