Abstract

AbstractThe green swordtail (Xiphophorus hellerii; Poeciliidae) is a popular ornamental freshwater fish species. Fourteen microsatellites were isolated from a green swordtail genomic library enriched for CA‐repeats. Thirteen microsatellites were polymorphic in green swordtail; interestingly four of them were tetranucleotide‐type. Cross‐species amplification showed that 10 of the 14 microsatellites were polymorphic in guppy (Poecilia reticulata; Poeciliidae) as well. No significant directional difference of allele length was seen between the two species at any of the loci tested.

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