An integrated and comparative genetic map of the turkey genomeReed K.M. · Chaves L.D. · Mendoza K.M.
Department of Veterinary and Biomedical Sciences, University of Minnesota, St. Paul, MN (USA)
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An integrated genetic linkage map was developed for the turkey (Meleagris gallopavo) that combines the genetic markers from the three previous mapping efforts. The UMN integrated map includes 613 loci arranged into 41 linkage groups. An additional 105 markers are tentatively placed within linkage groups based on two-point LOD scores and 19 markers remain unlinked. A total of 210 previously unmapped markers has been added to the UMN turkey genetic map. Markers from each of the 20 linkage groups identified in the Roslin map and the 22 linkage groups of the Nte map are incorporated into the new integrated map. Overall map distance contained within the 41 linkage groups is 3,365 cM (sex-averaged) with the largest linkage group (94 loci) measuring 533.1 cM. Average marker interval for the map was 7.86 cM. Sequences of markers included in the new map were compared to the chicken genome sequence by ‘BLASTN’. Significant similarity scores were obtained for 95.6% of the turkey sequences encompassing an estimated 91% of the chicken genome. A physical map of the chicken genome based on positions of the turkey sequences was built and 36 of the 41 turkey linkage groups were aligned with the physical map, five linkage groups remain unassigned. Given the close similarities between the turkey and chicken genomes, the chicken genome sequence could serve as a scaffold for a genome sequencing effort in the turkey.
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