Castillo-Hernández Gabriela, González-Luna Sandra, Castillo-Hernández Laura, Torres-Hernández Glafiro, Maldonado-Jáquez Jorge A
Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, 54714, Cuautitlán Izcalli, Estado de México, México.
Colegio de Postgraduados-Campus Montecillo. Programa de GanaderíaEstado de México, 56230, Montecillo, Estado de México, México.
Trop Anim Health Prod. 2025 Mar 21;57(3):137. doi: 10.1007/s11250-025-04382-y.
The aim of this study was to evaluate the pre and post-weaning performance of Columbia lambs under an intensive system in central Mexico. Productive data of 657 Columbia lambs (346 males and 5.3 kg at birth; 311 Females and 4.9 kg at birth) in the period from 2017 to 2020 were considered. Live weight data were collected by sex, birth weight (BW), pre-weaning average daily gain (preADG) and post-weaning average daily gain (postADG), weaning weight (WW), final weight (FW), final age (FA) and mortality percentage data. No significant interactions between year, sex and litter size were found (p > 0.05). Differences were detected among years for all variables (p < 0.05). When comparing males vs. females, the highest values were found in males in almost all the variables (p < 0.05) except for FW and mortality (p > 0.05). The age to achieve final weight was greater in females (p < 0.05). Regarding litter size, singles were heavier and had more preADG than twins (p < 0.05). The phenotypic correlations showed significant (p < 0.05) and positive relationships between 1) BW with preADG and postADG, 2) preADG with WW and 3) FW with FA. On the contrary, negative correlations were detected (p < 0.05) between 1) WW with postADG and 2) postADG with FW. In conclusion, Columbia breed lambs could played an important role to improve meat production in intensive systems in central Mexico.
本研究的目的是评估墨西哥中部集约化养殖系统下哥伦比亚羔羊断奶前后的生长性能。研究考虑了2017年至2020年期间657只哥伦比亚羔羊（346只雄性，出生体重5.3千克；311只雌性，出生体重4.9千克）的生产数据。收集了按性别、出生体重（BW）、断奶前平均日增重（preADG）、断奶后平均日增重（postADG）、断奶体重（WW）、最终体重（FW）、最终年龄（FA）和死亡率百分比的数据。未发现年份、性别和产仔数之间存在显著交互作用（p＞0.05）。所有变量在不同年份间均检测到差异（p＜0.05）。比较雄性和雌性时，除FW和死亡率外（p＞0.05），几乎所有变量中雄性的值最高（p＜0.05）。雌性达到最终体重的年龄更大（p＜0.05）。关于产仔数，单胎羔羊比双胎羔羊更重且断奶前平均日增重更高（p＜0.05）。表型相关性显示：1）BW与preADG和postADG之间、2）preADG与WW之间、3）FW与FA之间存在显著（p＜0.05）正相关关系。相反，检测到1）WW与postADG之间、2）postADG与FW之间存在负相关（p＜0.05）。总之，哥伦比亚品种羔羊在改善墨西哥中部集约化养殖系统的肉类生产方面可发挥重要作用。
