Phylogenetic analysis and species allocation of individual equids using microsatellite data

Area of Science:

• * Molecular genetics and evolutionary biology.
• * Conservation genetics and wildlife management.
• * Taxonomy and phylogenetics of Equidae.

Background:

• * The precise taxonomic status of equid species remains incompletely understood.
• * Accurate species identification is crucial for effective conservation of endangered populations, including Asiatic wild asses.
• * Fragmented populations necessitate robust genetic data for targeted conservation efforts.

Purpose of the Study:

• * To assess species demarcation and phylogenetic relationships within Asiatic wild asses using molecular markers.
• * To determine the population of origin for individual equids.
• * To provide genetic insights for the management of captive conservation herds.

Main Methods:

• * Utilized a panel of 31 microsatellite loci for genetic analysis.
• * Analyzed genetic data from 120 individuals across 11 distinct equid populations.
• * Employed phylogenetic analysis and Bayesian approaches for species demarcation and individual assignment.

Main Results:

• * Phylogenetic analysis yielded coalescence times consistent with fossil and mtDNA data.
• * Bayesian methods successfully distinguished between studied equid taxa, though individual assignment varied.
• * Genetic data supports maintaining separate captive conservation programs for Equus hemionus onager and Equus hemionus kulan.
• * Initial molecular data for Equus hemionus luteus suggested a closer relationship with Equus kiang holderi than other hemiones.

Conclusions:

• * The study provides crucial molecular genetic data for equid taxonomy and conservation.
• * Findings reinforce the need for distinct conservation strategies for Equus hemionus onager and Equus hemionus kulan.
• * Further research is required to resolve the genetic status of Equus hemionus luteus due to contradictory findings.