Institut für Tierernährung, Universität Hohenheim, 70599 Stuttgart, Germany Institut für Tierhaltung und Tierzüchtung, Universität Hohenheim, 70599 Stuttgart, Germany.
Institut für Tierernährung, Universität Hohenheim, 70599 Stuttgart, Germany.
Poult Sci. 2014 Aug;93(8):1916-21. doi: 10.3382/ps.2014-03982. Epub 2014 Jun 3.
This study estimated the genetic variance components of P utilization in Japanese quail. A parental generation was assembled from an unselected random-bred Japanese fattening quail line. Seven sires and 14 dams were randomly selected, and each sire was paired with 2 dams to produce full and half sibs. A total of 200 unsexed 1-d-old quail with known pedigree were wing-banded and raised during the first 4 d posthatch in groups in floor pens on wood shavings and fed a preexperimental diet that was adequate in all nutrients. Starting on d 5, quail were individually housed in metabolic compartments on P-free filter paper. This started a balance trial with 5 d of adaption and 5 d of total excreta collection. During this balance period, all quail were fed a low-P (3.9 g/kg of DM) corn-soybean meal-based diet with a Ca:P ratio of 1.6:1.0. Phosphorus and Ca utilization were determined individually using the difference in P or Ca intake and the total P or Ca excretion. The average P utilization was 72% and the average Ca utilization was 63%, each with very high variation. Heritabilities were estimated to be 0.09 (SE = 0.09) for P utilization and 0.09 (SE = 0.09) for Ca utilization. Heritabilities were close to the values reported in the literature for broilers and suggest that quail are suitable as a model animal. The SE of the heritability estimates were large. This implies that further studies with a larger sample size are needed to identify genetic and physiological mechanisms that influence P and Ca utilization in Japanese quail.
本研究估计了日本鹌鹑磷利用的遗传方差组分。亲本组由未经选择的随机选育日本肥育鹌鹑系组成。随机选择了 7 个父本和 14 个母本，每个父本与 2 个母本配对，产生全同胞和半同胞。共有 200 只 1 日龄未分性别的日本鹌鹑，具有已知的系谱，用翅膀带标记，并在孵化后第 4 天在木屑地板笼中分组饲养，喂食一种所有营养素都充足的预实验饮食。从第 5 天开始，鹌鹑被单独饲养在无磷过滤纸上的代谢隔室中。这开始了一个平衡试验，适应期为 5 天，总排泄物收集期为 5 天。在这个平衡期内，所有鹌鹑都喂食一种低磷（3.9 g/kg DM）的玉米-豆粕基础日粮，钙磷比为 1.6:1.0。通过比较磷或钙的摄入量和总磷或钙的排泄量，单独确定磷和钙的利用情况。平均磷利用率为 72%，平均钙利用率为 63%，两者的变异都非常大。磷利用率的遗传力估计为 0.09（SE = 0.09），钙利用率的遗传力估计为 0.09（SE = 0.09）。遗传力接近文献中报道的肉鸡的值，表明鹌鹑适合作为模型动物。遗传力估计值的 SE 较大。这意味着需要进行进一步的研究，增加样本量，以确定影响日本鹌鹑磷和钙利用的遗传和生理机制。
