Polymorphic microsatellite loci from the American goldfinch ( Carduelis tristis ) and their cross-amplification in a variety of passerine species

Cardueline finches have become important models in studies of sexual selection. Here I describe eight polymorphic microsatellite loci isolated from the American goldfinch ( Carduelis tristis ) that are useful in parentage and heterozygosity studies. The number of alleles per locus ranged from eight to 38 based on 252 goldfinches. The markers are polymorphic in at least four other Cardueline finch species, and several amplify in nonfinch passerines including red-winged blackbird ( Agelaius phoeniceus ), black-throated blue warbler ( Dendroica caerulescens ) and tufted titmouse ( Baeolophus bicolor ), indicating they should be useful in paternity and population studies of a variety of species.