Effects of feeding lycopene isomers to laying hens on egg qualities such as lycopene concentration and color of the yolk were investigated. Firstly, to evaluate the dietary transfer of lycopene to egg yolk, (all-E)-lycopene-rich diets (lycopene content, 100, 200, or 300 mg/kg diet) were fed to hens for 21 days. Lycopene in egg yolk could be detected after 4 days or more from the start of feeding, and the lycopene concentration increased according to the feed amount and period. Even though most of the dietary lycopene was the all-E-isomer, more than 65% of lycopene in egg yolk was present as Z-isomers. Thus, the effect of lycopene Z-isomer content in the diet (lycopene content, 200 mg/kg diet; lycopene Z-isomer content, 35.1% or 61.3%) on egg qualities was investigated. As the Z-isomer content increased, the lycopene concentration in the egg yolk increased, for example, when fed a diet rich in Z-isomers (61.3%), the lycopene concentration in the egg yolk was approximately three times higher than when fed the (all-E)-lycopene-rich diet for 21 days. The results indicated that Z-isomers of lycopene had higher bioavailability and/or higher transfer efficiency to the egg yolk than the all-E-isomer.

中文翻译：

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饲喂富含全E-异构体和富含Z-异构体的番茄红素的蛋黄中番茄红素浓度和Z-异构体含量的变化。

研究了将番茄红素异构体喂入蛋鸡对蛋品质如番茄红素浓度和蛋黄颜色的影响。首先，为了评估番茄红素向蛋黄的饮食转移，将（全E）-番茄红素的日粮（番茄红素含量为100、200或300 mg / kg的日粮）喂给母鸡21天。从喂食开始4天或更长时间后，可以检测到蛋黄中的番茄红素，番茄红素的浓度随喂食量和喂食时间的延长而增加。即使大多数饮食中的番茄红素是全E异构体，蛋黄中番茄红素的65％以上仍以Z异构体的形式存在。因此，研究了日粮中番茄红素Z-异构体含量（番茄红素含量为200 mg / kg日粮；番茄红素Z-异构体含量为35.1％或61.3％）对蛋品质的影响。随着Z-异构体含量的增加，蛋黄中的番茄红素浓度增加，例如，当饲喂富含Z异构体的日粮（61.3％）时，蛋黄中的番茄红素浓度大约是饲喂（全E）番茄红素时的三倍。丰富的饮食21天。结果表明，番茄红素的Z-异构体具有比全E-异构体更高的生物利用度和/或更高的向蛋黄的转移效率。