Publications by authors named "J Poyato-Bonilla"
Article Synopsis
- The Carthusian horse is a unique strain of the Pura Raza Español created over 500 years ago, with a study analyzing its population structure using both genealogical and genomic data.
- The study analyzed a large dataset of pedigree records and high-density genotypes, revealing a good correlation in inbreeding coefficients among different subpopulations.
- Findings indicate a high level of introgression from the Carthusian strain, a recent decrease in genetic variability, and the identification of an ancient PRE strain that remains largely unaffected by other equine populations.
Measurements from 13 different morphological traits of importance in the Pura Raza Español (PRE) horse were used to estimate genetic and environmental parameters following a heteroscedastic model in which data were assigned to stallions. Data sets used ranged from 20,610 (height at withers) to 48,486 measurements (length of shoulder), and the number of animals analysed in the pedigrees varied from 17,662 (height at withers) to 23,962 (dorsal-sternal diameter). Results of heritabilities of the traits varied from 0.
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- Inbreeding results from mating between related individuals, leading to reduced fitness, known as inbreeding depression, which varies significantly among founder individuals.
- This study aimed to analyze the population structure and general inbreeding in the Pura Raza Española horse breed while also testing a new method to predict hidden inbreeding depression related to three morphological traits and two defects.
- The results indicated significant inbreeding depression across the population, with varying heritability and inbreeding depression load ratios among traits, although many horses still showed positive traits despite average negative inbreeding depression loads.
Reproductive traits have a major influence on the economic effectiveness of horse breeding. However, there is little information available. We evaluated the use of reproductive traits as selection criteria in official breeding programs to increase the reproductive efficiency of breeding studs, analysing 696 690 records from the pedigree data of eight Spanish horse populations, with different breeding purposes.
View Article and Find Full Text PDFChromosomal abnormalities are a major cause of infertility and reproductive problems in equids. Nowadays, their detection is rising due to the use of new diagnostic tools based on molecular markers instead of karyotyping. Reports of this kind of genetic aberrations in domestic donkeys (Equus asinus) are extremely scarce, despite their importance in human activities.
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