Peebles E D, Gardner C W, Brake J, Benton C E, Bruzual J J, Gerard P D
Department of Poultry Science, Mississippi State University, Mississippi State 39762, USA.
Poult Sci. 2000 Oct;79(10):1373-7. doi: 10.1093/ps/79.10.1373.
The relationship of albumen height (AH) to the compositions of yolks and embryos in hatching eggs from a young (30 wk of age) broiler breeder flock was evaluated during incubation. On Day 2 of incubation, egg weight, yolk weight, and yolk moisture, lipid, and fatty acid contents were determined in eggs from broiler breeders previously identified as laying eggs of either low or high AH. In addition, egg weight, wet and dry embryo weight, and embryo moisture and protein contents were determined on Days 10, 12, and 16, and embryo lipid content was determined on Days 12 and 16. Yolk and embryo weights were expressed as percentages of sampled egg weight. Egg, yolk, and wet embryo weights, yolk moisture and lipid contents, and embryo moisture, protein, and lipid contents were not affected by AH; however, yolk myristic acid concentration was higher, and yolk linoleic acid concentration was lower, in low AH eggs on Day 2 of incubation. Furthermore, on Day 16, dry embryo weight was significantly higher in low AH eggs. Young breeder hens laying eggs of different AH may also produce egg yolks with different fatty acid compositions. Differences in yolk fatty acid profiles between AH groups during early incubation may impact subsequent embryo DM weight without associated effects on embryo moisture, protein, or lipid contents.
在孵化期间，评估了来自年轻（30周龄）肉种鸡群的孵化蛋中蛋白高度（AH）与蛋黄和胚胎成分之间的关系。在孵化第2天，测定了先前鉴定为产低AH蛋或高AH蛋的肉种鸡所产蛋的蛋重、蛋黄重、蛋黄水分、脂质和脂肪酸含量。此外，在第10、12和16天测定了蛋重、湿胚重和干胚重以及胚胎水分和蛋白质含量，并在第12和16天测定了胚胎脂质含量。蛋黄和胚胎重量以抽样蛋重的百分比表示。蛋、蛋黄和湿胚重量、蛋黄水分和脂质含量以及胚胎水分、蛋白质和脂质含量不受AH的影响；然而，在孵化第2天，低AH蛋中的蛋黄肉豆蔻酸浓度较高，而蛋黄亚油酸浓度较低。此外，在第16天，低AH蛋中的干胚重显著更高。产不同AH蛋的年轻种母鸡也可能产出具有不同脂肪酸组成的蛋黄。孵化早期AH组之间蛋黄脂肪酸谱的差异可能会影响随后的胚胎干物质重量，而对胚胎水分、蛋白质或脂质含量没有相关影响。
