A Genetic Window on Sardinian Native Horse Breeds through Uniparental Molecular Systems.
Authors: Giontella Andrea, Cardinali Irene, Pieramati Camillo, Cherchi Raffaele, Biggio Giovanni Paolo, Achilli Alessandro, Silvestrelli Maurizio, Lancioni Hovirag
Journal: Animals : an open access journal from MDPI
Summary
# Editorial Summary: Genetic Window on Sardinian Native Horse Breeds Sardinia's three native horse breeds—Giara, Sarcidano, and Sardinian Anglo-Arab—represent distinct genetic resources shaped by their island isolation and breeding histories, yet little was known about their maternal and paternal lineages until this 2020 investigation. Researchers analysed Y chromosome markers in 34 stallions and mitochondrial DNA from 178 horses across all three breeds to map their genetic origins and population structure. Three paternally inherited haplotypes were identified, with each breed displaying a characteristic signature: the Sarcidano carried the ancestral form plus evidence of Neapolitan and Oriental influence, the Giara showed predominantly Neapolitan/Oriental genetics, and the Sardinian Anglo-Arab carried Thoroughbred genetics, reflecting their distinct breeding development pathways. Maternally, the Giara and Sarcidano shared common ancestral mares (indicating low genetic diversity), whilst the Sardinian Anglo-Arab demonstrated greater mare lineage diversity, suggesting it absorbed genetics from multiple sources during its establishment. These findings have immediate relevance for breeding programmes and conservation efforts: managers can now identify which lineages are most at risk of loss, make informed decisions about outcrossing versus closed stud book strategies, and establish targeted preservation plans for endangered maternal and paternal lines within each breed.
Read the full abstract on PubMed
Practical Takeaways
- •Breed-specific genetic signatures can inform targeted conservation strategies for endangered Sardinian horse lineages, particularly for preserving distinct maternal and paternal lines
- •The common maternal ancestry between Giara and Sarcidano suggests potential for collaborative breeding programs, while Sardinian Anglo-Arab's multiple lineages offer broader genetic diversity
- •Understanding historical genetic influences (ancestral, Oriental, and Thoroughbred waves) helps breeders make informed decisions about maintaining breed authenticity versus introducing genetic variation
Key Findings
- •Three Y chromosome haplotypes identified in 34 Sardinian stallions, with each breed showing a characteristic haplotype: HT1 (ancestral) in Sarcidano, HT2 (Neapolitan/Oriental) in Giara, and HT3 (Thoroughbred) in Sardinian Anglo-Arab
- •Maternal analysis of 178 horses revealed low genetic variability and common maternal origin for Giara and Sarcidano breeds
- •Sardinian Anglo-Arab showed higher maternal variability indicating multiple mare lineages compared to the native breeds
- •Current genetic diversity patterns reflect independent breeding strategies and genetic drift effects specific to each Sardinian horse population