In ovo peptide YY administration improves body weight at hatch and day 3 in turkey poults
In ovo peptide YY administration improves body weight at hatch and day 3 in turkey poults
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DOI：
10.1093/japr/10.4.380
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发表时间：
2001-12-01
影响因子：
1.9
通讯作者：
Eisen, EJ
中科院分区：
文献类型：
--
作者：
Coles, BA;Croom, J;Eisen, EJ
我们实验室之前的研究表明，在孵化第 18 天卵内施用肽 YY (PYY) 可增强肉鸡在孵化后第一周的调整饲料转化率 (AFCR) 和体重增益。初步研究还表明，在孵化第 25 天时进行蛋内 PYY 给药也可增加 1 日龄尼古拉斯火鸡幼禽的空肠葡萄糖吸收。本研究的目的是进一步阐明卵内 PYY 给药对两个火鸡品系生长和饲料转化的影响：商业生长品系（BUT；英国联合土耳其）和蛋品系。来自两个火鸡品系的鸡蛋被随机放入同一个孵化器中。在孵化第25天，向380个BUT和440个Egg Line蛋注射100杯1.025%盐水（对照）或600μPYY/kg蛋重。孵化时，每个处理组的 168 只雏鸡被绑上翅膀、称重，并随机分布在四个 Petersime 组的围栏中。标准火鸡开胃碎饲料和水可随意使用。在第 3 天、第 10 天和第 17 天对饲料和家禽进行称重，以确定体重增加和 AFCR。在第 3 天，来自 PYY 处理鸡蛋的两个品系的雏鸟均比对照重 (P < 0.01)。这种效应在第 10 天和第 17 天并不明显。在第 17 天随机选择来自每个处理组的一部分雏鸟，并通过解剖确定性别。孵化时和第 3 天，两性之间没有体重差异（分别为 P = 0.94 和 P = 0.15）。雄性在第 10 天和第 17 天时体重较重 (P = 0.0001)。这些结果表明，PYY 提高了雏鸡体重，并可能减弱孵化后早期由性别引起的体重差异。
Previous studies in our laboratory have demonstrated that in ovo administration of peptide YY (PYY) at Day 18 of incubation enhanced adjusted feed conversion ratio (AFCR) and BW gains of broilers during the first week post-hatch. Preliminary studies have also shown that in ovo PYY administration at Day 25 of incubation also increases jejunal glucose absorption in 1-d-old Nicholas turkey poults. The objective of this study was to further elucidate the effects of in ovo PYY administration on growth and feed conversion in two turkey lines: a commercial growth line (BUT; British United Turkey, UK) and the Egg Line. Eggs from both turkey lines were randomly placed in the same incubator. On Day 25 of incubation, 380 BUT and 440 Egg Line eggs were injected with 100 mug 1.025% saline (control) or 600 mu PYY/kg egg weight. At hatch, 168 poults from each treatment group were wing-banded, weighed, and randomly distributed across pens in four Petersime batteries. A standard turkey starter crumble feed and water were available ad libitum. Feed and birds were weighed on Days 3, 10, and 17 to determine BW gains and AFCR. Poults of both lines from PYY-treated eggs were heavier (P < 0.01) than controls at Day 3. This effect was not apparent at Days 10 and 17. A subset of birds from each treatment group was randomly chosen at Day 17 and sexed by dissection. At hatch and again at Day 3, there were no BW differences (P = 0.94 and P = 0.15,, respectively) noted between sexes. Males were heavier at 10 and 17 d (P = 0.0001). These results suggest that PYY enhances poult weight and may attenuate differences in BW caused by gender during early post-hatch life.