Summary
This study examines the genomic characteristics of Rarámuri Criollo cattle — a heritage breed originating from northern Mexico — following their introduction to the southwestern United States, using SNP array data to assess genetic diversity, population admixture with other cattle breeds, and signatures of natural or artificial selection. The findings likely highlight genomic regions associated with adaptation to harsh, arid environments including heat tolerance, water efficiency, and foraging behaviour on degraded or semi-arid rangelands. The work contributes to understanding how heritage Criollo genetics may offer resilience traits relevant to sustainable extensive livestock production in drought-prone regions.
UK applicability
This study is directly focused on North American arid rangelands and a breed with no established presence in the UK; however, the broader methodological approach to identifying adaptive genomic traits in heritage breeds may inform UK interest in using genetic diversity of traditional breeds for climate resilience in upland or drought-stressed pastoral systems.
Key measures
SNP-based genetic diversity indices (heterozygosity, FST, ROH); admixture proportions; selection signature statistics (e.g. XP-EHH, iHS, or Fst outlier tests); principal component analysis of genomic data
Outcomes reported
The study likely characterised the genetic diversity and population structure of Rarámuri Criollo cattle introduced to the southwestern US, identifying admixture with other breeds and genomic regions under selection potentially associated with adaptation to arid rangeland environments.
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