Microsatellites from the beluga whale Delphinapterus leucas

Area of Science:

• Marine Mammal Genetics
• Population Genomics
• Conservation Genetics

Background:

• Beluga whales (Delphinapterus leucas) are a key Arctic species facing conservation challenges.
• Understanding population structure is vital for effective management and conservation strategies.
• Microsatellite markers are powerful tools for population genetics research.

Purpose of the Study:

• To isolate and characterize novel microsatellite loci for beluga whales.
• To assess the utility of these markers for population assignment.
• To evaluate cross-species amplification in other cetaceans.

Main Methods:

• Genomic library construction and microsatellite isolation from beluga whales.
• PCR amplification and genotyping of 100 beluga whales from two distinct populations.
• Analysis of allele number, heterozygosity, and Hardy-Weinberg equilibrium.
• Testing primer cross-reactivity in 15 other cetacean species.

Main Results:

• Fifteen polymorphic microsatellite loci were successfully isolated and characterized.
• High average allelic diversity (8.6 alleles/locus) and heterozygosity (0.65) were observed.
• Microsatellite markers achieved 98% accuracy in assigning whales to their stock-of-origin.
• Primers showed successful amplification in 15 additional cetacean species.

Conclusions:

• The developed microsatellite markers are highly informative for beluga whale population studies.
• These genetic markers provide a reliable method for stock identification, aiding conservation efforts.
• The broad cross-species applicability of these primers expands their utility in cetacean research.