The aim of this study was to determine the technological parameters of the fibre of wool and meat sheep breeds obtained by transfer of embryos imported from Australia and intended for the improvement of sheep herds in the central highlands of Peru. The study was carried out at the Casaracra Experimental Center of the Daniel Alcides Carrión National University, Junín Region, Peru, at 3772 meters above sea level. The breeds were East Friesian, Poll Dorset, Corriedale, Texel, Merino Dohne, and Finnish Landrace. The linear additive model included the factors breed, sex, age and corporal region of sampling, while the interactions were considered residual. An inverse association was found between fibre diameter and crimp curvature (-0.59) and with comfort factor (-0.98); likewise between the crimp curvature with the staple length (-0.43); On the other hand, the association was direct between...

Sheep production in the high Andean regions of Peru faces several challenges, including low productive performance, particularly during the pre-weaning stage. Therefore, the appropriate selection of breeds adapted to these conditions could significantly improve growth indicators and increase the profitability of the production system. The study aimed to compare the behavior of preweaning growth criteria in male and female lambs of six sheep breeds (Dohne Merino, Corriedale, Texel, Poll Dorset, Finnish Landrace, and East Friesian) raised in the high Andean conditions of Peru. A total of 199 live weight records of lambs were evaluated at birth, 25, 60, 90 days, and weaning. The analysis of variance revealed significant differences between breeds, separated by sex, and the Principal Component Analysis examined patterns of variation among variables and breeds. The results showed that males o...