The aim of this study was to evaluate the genetic diversity of the Mexican criollo donkey with SNP-type genetic markers. Sixteen individuals (eight males and eight females) were randomly sampled and genotyped using the GGP Equine 70K chip (71 947 loci). Within chromosome the polymorphic SNPs were identified, determining the expected (He) and observed (Ho) heterozygosity, polymorphic information content (PIC), the fixation index (FIS) and the Hardy-Weinberg equilibrium (HW). Linkage disequilibrium was assessed based on the correlation (r2) between frequencies across loci. An analysis of molecular variance (AMOVA) and a cluster study were performed to infer the number of clusters (k). It was found that 3579 loci (4.9%) presented genetic variability, but 24.9% presented HW disequilibrium (p<0.05). Across chromosomes, the number of polymorphic loci ranged from 50 to 269 with a mean of 11...

The aim of this study was to evaluate the productive performance and benefit-cost ratio (B:C) of fattening lambs in confinement with diets that included Canavalia ensiformis beans in meal (CH) or pelleted (CP). Twelve Pelibuey lambs with an initial live weight of 15.0 ± 0.64 kg were used, randomly assigned to treatments that included CH or CP at levels of 25% (25CH and 25CP) and 50% (50CH and 50CP) as a protein source. Final live weight (FW), daily weight gain (DWG), daily feed intake (DFI), feed conversion ratio (FCR), usable feed efficiency (UFE), and benefit : cost ratio (BCR) were evaluated during the initiation and development stages. In the first period, the variables FW, DFI, FCR, and UFE were similar (p>0.05) between treatments. Control lambs had the highest DWG (270.6 g/d). In the development period, lambs in the Control and 50CH groups had the best FCR and lowest UFE (p<...