Caracterización genética y fenotípica de una población de cerdo pelón mexicano

Abstract

In Mexican hairless pig analyzed the pedigree (n = 305), 16 morphological variables (VARMOR, n = 201) and 74 genetic markers (SNP, n = 107) for use in paternity tests. Was calculated: founder ancestors; effective size (Ne); inbreeding; generational interval (IG); Wright F statistics (FST, FIS and FIT). The VARMOR were head length, head width, snout length, snout width, ear length, width of ears, distance between orbitals, height at the cross, chest width, chest circumference, neck length, neck width, cane perimeter, body length, pelvic width, abdominal perimeter; analyzed with the mixed model: y = μ + si + gj + β1 + β2 + mad + e; where: y, response variable; μ, mean; si, sex; fj, farm; β1 and β2, linear and quadratic of the covariate age of the animal; mad, random effect of the mother; e, residuals. With the correlation matrix, a principal component analysis was carried out. For the SNPs, the polymorphic information content (PIC) and its components were estimated, as well as the probabilities of non-exclusion combined (PNE). Ne = 92.10; ancestors that explain 50% of the pedigree = 7; percentage of inbreeding animals = 2.3%; average inbreeding = 0.11%; average IG = 1.69 years. FST = 7%; FIS and FIT of -0.083 and -0.006, respectively. Mad explained, on average, 54.3% of the variability. For PIC, the average was 0.266 with values in the interval of 0.018 to 0.375; the PNE were in the interval of 0.007 to 3.1E-22.