Growth curves and age-related changes in carcass characteristics, organs, serum parameters, and intestinal transporter gene expression in domestic pigeon (Columba livia)
Growth curves and age-related changes in carcass characteristics, organs, serum parameters, and intestinal transporter gene expression in domestic pigeon (Columba livia)
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家鸽（Columba livia）的生长曲线和胴体特征、器官、血清参数和肠道转运蛋白基因表达的年龄相关变化
DOI：
10.3382/ps/pev443
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发表时间：
2016-04-01
期刊：
影响因子：
4.4
通讯作者：
Wang, X. Q.
中科院分区：
文献类型：
--
作者：
Gao, C. Q.;Yang, J. X.;Wang, X. Q.
本研究通过两个试验拟合家鸽生长曲线，并测定其胴体性状、器官、血清生化指标和肠道营养转运蛋白基因表达的日变化。试验一测定了30只乳鸽1、3、7、14、21、28、35日龄的体重，拟合生长曲线，描述乳鸽的生长情况。试验2将84只1日龄乳鸽按体重分为7组。在第1、3、7、14、21、28和35天，每组随机选择12只鸡进行屠宰和屠宰后分析。结果显示，鸽子的体重从第1天到第28天迅速增加（增加了25.7倍），然后直到第35天变化不大。Logistic、Gompertz和Von Bertalanffy模型均能很好地拟合家鸽生长曲线（R-2 > 0.90），其中Gompertz模型的R-2值最高（R-2 = 0.9997）。Gompertz模型方程为Y = 507.72 x e-（3.76exp（-0.17t））（Y =体重（g）; t =时间（天））。胸肉产肉率（%）在整个试验过程中随日龄的增加而增加，而腿肉产肉率（%）在第14天达到峰值。血清总蛋白、白蛋白、球蛋白、葡萄糖浓度随年龄增长而升高，血尿酸浓度随年龄增长而降低（P < 0.05）。营养转运蛋白（y（+）LAT 2、LAT 1、B 0AT 1、PepT 1和NHE 2）基因在鸽空肠的表达量随日龄增加而增加。相关分析结果显示，B 0AT 1、PepT 1和NHE 2基因表达量与体重呈正相关（0.73 <相关系数< 0.80，P < 0.0001）。因此，28日龄应是肉鸽上市的最晚日龄。不同器官的生理功能特性、血清学特征以及小肠营养转运蛋白基因表达的差异可能导致其发育模式的差异。
Two experiments were conducted to fit growth curves, and determine age-related changes in carcass characteristics, organs, serum biochemical parameters, and gene expression of intestinal nutrient transporters in domestic pigeon (Columba livia). In experiment 1, body weight (BW) of 30 pigeons was respectively determined at 1, 3, 7, 14, 21, 28, and 35 days old to fit growth curves and to describe the growth of pigeons. In experiment 2, eighty-four 1-day-old squabs were grouped by weight into 7 groups. On d 1, 3, 7, 14, 21, 28, and 35, twelve birds from each group were randomly selected for slaughter and post-slaughter analysis. The results showed that BW of pigeons increased rapidly from d 1 to d 28 (a 25.7-fold increase), and then had little change until d 35. The Logistic, Gompertz, and Von Bertalanffy functions can all be well fitted with the growth curve of domestic pigeons (R-2 > 0.90) and the Gompertz model showed the highest R-2 value among the models (R-2 = 0.9997). The equation of Gompertz model was Y = 507.72 x e-(3.76exp(-0.17t)) (Y = BW of pigeon (g); t = time (day)). In addition, breast meat yield (%) increased with age throughout the experiment, whereas the leg meat yield (%) reached to the peak on d 14. Serum total protein, albumin, globulin, and glucose concentration were increased with age, whereas serum uric acid concentration was decreased (P < 0.05). Furthermore, the gene expressions of nutrient transporters (y(+) LAT2, LAT1, B0AT1, PepT1, and NHE2) in jejunum of pigeon were increased with age. The results of correlation analysis showed the gene expressions of B0AT1, PepT1, and NHE2 had positive correlations with BW (0.73 < correlation coefficient < 0.80, P < 0.0001). It can be concluded that, 28-day-old should be the latest market age for meat type pigeon. And the various physiological and functional properties of organs, serum profiles, and gene expression of nutrient transporters in small intestine might cause the differences in their development patterns.