Dietary lysine affects chickens from local Chinese pure lines and their reciprocal crosses.
Dietary lysine affects chickens from local Chinese pure lines and their reciprocal crosses.
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DOI：
10.3382/ps.2012-02865
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发表时间：
2013-06
期刊：
影响因子：
4.4
通讯作者：
Juan Li;Xiaoling Zhao;Yun Yuan;E. Gilbert;Yan Wang;Yiping Liu;Yao Zhang;Qing Zhu
中科院分区：
文献类型：
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作者：
Juan Li;Xiaoling Zhao;Yun Yuan;E. Gilbert;Yan Wang;Yiping Liu;Yao Zhang;Qing Zhu
本试验的目的是评估日粮赖氨酸浓度对 2 个鸡品系 SD02 和 SD03 及其杂交鸡的肉品质和胴体性状的影响，这两个品系均源自中国本土品种二郎山鸡。该品系由四川农业大学（中国雅安）筛选出4代；在本研究中，来自 2 个品系及其杂交的鸡在孵化时被随机分配到 2 个饮食组中的 1 个。一组在第 1 至 28 天、第 29 至 49 天和第 50 至 70 天分别提供含有 1、0.85 和 0.70% 总赖氨酸的饮食，而另一组则分别提供含有 1.15、1 和 0.85% 总赖氨酸的饮食。总共有 252 只 70 日龄的鸡进行了商业化加工。测量的性状包括活体体重、皮下脂肪厚度、胴体重量、去内脏胴体、半去内脏胴体、胸肌（左胸大肌和胸小肌）、腿部肌肉（无骨左鼓加大腿）、心脏、砂囊、腺胃、脾脏、肝脏、鸡冠和腹部脂肪、颜色参数亮度、红色或黄色（L*、a*和b*）、pH值和胸肌肌内脂肪内容。结果表明，日粮赖氨酸浓度虽然不影响皮下脂肪厚度、颜色参数、pH、肌内脂肪含量和器官重量，但对饲料转化率、肌肉和体重有影响（P < 0.05）。雄性和雌性在饲料转化率、体重、肌肉生长和器官重量方面表现出重大差异。与SD03系和互交相比，SD02系鸡生长更快，脂肪沉积更少，饲料转化率更高。总之，本研究中评估的鸡汤的性能在肌肉重量和胴体重量方面存在很大差异。
The objective of this experiment was to evaluate the effect of dietary lysine concentration on meat quality and carcass traits in 2 chicken lines, SD02 and SD03, and their crosses, both originating from a Chinese native breed, the Erlang Mountainous chicken. The lines were selected for 4 generations by Sichuan Agricultural University (Ya'an, China); for the present study, chickens from the 2 lines and their crosses were randomly assigned at hatch to 1 of 2 dietary groups. One group was offered diets containing 1, 0.85, and 0.70% total lysine, whereas the other was offered diets with 1.15, 1, and 0.85% total lysine from d 1 to 28, d 29 to 49, and d 50 to 70, respectively. In total, 252 chickens were commercially processed at 70 d old. Traits measured included live BW, subcutaneous fat thickness, weight of carcass, eviscerated carcass, semi-eviscerated carcass, breast muscle (left pectoralis major and minor), leg muscle (boneless left drum plus thigh), heart, gizzard, proventriculus, spleen, liver, comb, and abdominal fat, color parameters lightness, redness, or yellowness (L*, a*, and b*), pH, and breast muscle intramuscular fat content. The results indicated that, although dietary lysine concentration did not affect subcutaneous fat thickness, color parameters, pH, intramuscular fat content, and organ weights, there were effects on feed conversion and muscle and BW (P < 0.05). Males and females displayed major differences in feed conversion, BW, muscle growth, and organ weight. The Line SD02 chickens grew faster and displayed less fat deposition and superior feed conversion compared with Line SD03 and the reciprocal crosses. In conclusion, performance of the chicken stocks evaluated in this study differs substantially in muscle weight and carcass weight.