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Abstract
Cross-species amplification of 520 chicken microsatellite markers was tested by polymerase chain reaction with genomic DNA of the turkey (Meleagris gallopavo). Each primer pair was tested at six different combinations of annealing temperature and MgCl2 concentration. A total of 280 (54%) of the primer pairs produced amplification products. The majority of these products were similar, if not identical in size to those expected based on the fragment sizes of the corresponding chicken loci. Structure of the dinucleotide repeat and flanking sequences was examined for 13 turkey fragments (amplified with chicken primers) and 5 chicken fragments (amplified with turkey primers). Sequence analysis found a wide array of mutations between species in addition to differences in repeat length. To estimate the usefulness of the amplified loci for genetic mapping in the turkey, allelic polymorphism was determined for 57 of the 280 amplified loci. A total of 20 of 57 markers (35%) were polymorphic with an average of 1.4 alleles per locus. The results of this study suggest that approximately 20% of the chicken microsatellite markers will be useful for mapping the turkey genome.Key words: microsatellite, chicken, turkey, Meleagris gallopavo.
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