Relationship between Plasma and Egg Cholesterol Contents in the Laying Hen, and Changes in the Plasma Cholesterol Level with Age of the Young Chick
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概要
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The present study was undertaken as a preliminary test to explore the possibility to select a flock producing eggs contained less amount of cholesterol. Plasma samples of 280 hens of several breeds and their 162 eggs were used for cholesterol determination. The commercial standard ration and tap water were fed ad libitum. The plasma cholesterol content was determined by the method of ZURKOWSKI (1964) and the yolk cholesterol by combining the both methods described by FISHER and LEVEILLE (1957) and HARRIS and WILCOX (1963). Average plasma cholesterol content in the laying hen was 155.8±52.4mg/dl, and there existed significant differences among the breeds and strains. The plasma level in the non-laying hen averaged 159.8mg/dl, and it was a little higher than that in the laying hen. The rooster indicated a significantly lower cholesterol level than the laying hen, i.e., 88.1mg/dl. At the age of one day, both male and female chicks manifested the highest level (above 500mg/dl), and the level abruptly descended with advancing age up to 10 days of age, thereafter gradually decreasing till 8 weeks of age. The mean cholesterol level in the yolk samples obtained from six breeds (strains) was 14.9mg/g, and significant differences were found among the breeds. The total cholesterol content in a whole yolk averaged 289.7mg/yolk, ranging from 260.6 to 331.4mg/yolk. No significant correlation coefficient was found between the plasma cholesterol level in the laying hen and the yolk level in the egg laid by the same. Therefore, it is not likely to select a flock producing eggs containing less amount of cholesterol based upon the plasma level in the young chick.
- 横浜国立大学の論文
- 1971-12-28
著者
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Saeki Yuichi
Department Of Biochemistry And Applied Biosciences Faculty Of Agriculture University Of Miyazaki
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Saeki Yuichi
Department Of Agriculture
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Saeki Yuichi
Department Of Agricultural Chemistry Faculty Of Agriculture Kyushu University
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