Facultad de Estudios Superiores Cuautitlán, Universidad Nacional Autónoma de México, 54714, Cuautitlán Izcalli, Estado de México, Mexico.
Colegio de Postgraduados-Campus Montecillo, Programa de Ganadería, 56230, Montecillo, Estado de México, Mexico.
Trop Anim Health Prod. 2022 Jun 2;54(3):194. doi: 10.1007/s11250-022-03202-x.
The aim was to evaluate the pre-weaning productive performance and growth curve of DorperKatahdin (DPr; n = 46), KathadinKathadin (KTn; n = 204) and Romanov*Kathadin (RMv; n = 40) of commercial crossed lambs from central Mexico. We considered 1450 data from 290 crossbred lambs. The variables contemplated in this study were cross (CR), lambing type (LT), sex, birth weight (BW), weaning weight (WW), test days (TD), and daily weight gain (DWG). Correlation analysis and adjustment of growth curve were performed. Differences in CR and sex were found only in BW (p < 0.05). No differences in DWG, WW, and TD (p > 0.05) by CR and sex were found. Single lambing had the highest (p < 0.05) BW, WW, and DWG. Phenotypic correlations differ among crosses. Lambs crossed with DPr presented the highest values in parameters a and b and the lowest in c. The productive behavior of DPr, KTn, and RMv cross with KTn lambs in central Mexico is similar in the pre-weaning period; however, the growth curve and parameters that characterize it suggest that DPr lambs show a tendency to enhance productive behavior in this period.
本研究旨在评估来自墨西哥中部的商业杂交羔羊 DorperKatahdin（DPr；n=46）、KatahdinKatahdin（KTn；n=204）和 Romanov*Katahdin（RMv；n=40）的哺乳期前生产性能和生长曲线。我们考虑了 290 只杂交羔羊的 1450 个数据。本研究考虑的变量包括杂交组合（CR）、产羔类型（LT）、性别、初生重（BW）、断奶重（WW）、测试天数（TD）和日增重（DWG）。进行了相关分析和生长曲线调整。仅在 BW 上发现了 CR 和性别之间的差异（p<0.05）。在 DWG、WW 和 TD 上未发现 CR 和性别之间的差异（p>0.05）。单羔产羔具有最高的 BW、WW 和 DWG（p<0.05）。不同杂交组合之间的表型相关性存在差异。与 DPr 杂交的羔羊在参数 a 和 b 上具有最高值，在 c 上具有最低值。来自墨西哥中部的 DPr、KTn 和 RMv 与 KTn 杂交羔羊的哺乳期前生产性能相似；然而，生长曲线及其特征参数表明，DPr 羔羊在该时期表现出增强生产性能的趋势。
