Development of 16 microsatellite markers within the Camassia (Agavaceae) species complex and amplification in related taxa.

OBJECTIVE

The North American genus Camassia is an ecologically important group whose variability and evolution are little understood, being influenced by hybridization and geographic isolation. We developed microsatellite markers to investigate patterns of gene flow, population structure, and taxonomic relationships within this group. •

RESULTS

Using a traditional approach with biotin-labeled probes, we developed 16 microsatellite primers in three species of Camassia: C. howellii, C. leichtlinii, and C. quamash. The number of alleles per locus averaged 3.94 per species, and levels of heterozygosity ranged from 0.000 to 1.00 and 0.033 to 0.917 for observed and expected heterozygosities, respectively. All primers amplified to varying extents in additional species (C. angusta, C. cusickii, C. scilloides) and in putative species in a related genus (Hastingsia alba, H. atropurpurea, H. bracteosa, H. serpentinicola). •

CONCLUSIONS

These microsatellite markers exhibit variation and are useful for ongoing studies of integrative taxonomy and population differentiation within this species complex.