ARS | Publication request: Comparative Maps of Salmonid Genomes: An Update

Submitted to: Meeting Abstract
Publication Type: Abstract
Publication Acceptance Date: February 1, 2006
Publication Date: June 30, 2006
Citation: Gharbi, K., Coulibaly, I., Rexroad III, C.E., Moghadam, H., Leder, E.H., Ng, S., Davidson, W., Guyomard, R., Ferguson, M., Danzmann, R. 2006. Comparative maps of salmonid genomes: an update. Meeting Abstract. Montpellier, France 6/25 - 30, 2006.

Technical Abstract: The construction of detailed comparative maps for salmonid fishes is an important goal that will help transfer genetic information between species, study chromosome evolution, and compare the genetic architecture of complex traits across taxa. In this poster, we report on consolidating comparative maps previously established for rainbow trout (Oncorhynchus mykiss), Atlantic salmon (Salmo salar), brown trout (Salmo trutta), and Arctic char (Salvelinus alpinus) using new sets of genetic markers recently added to individual species maps. For each pairwise comparison, we derived a specific Oxford Grid that plots the comparative location of putative homologous markers between species and provides a graphical overview of current homologies among linkage groups. As a result, further support was found for previously reported homologies and new syntenic regions were discovered between species. In addition, we were able to identify chromosome segments that appear to occur in all four genomes, which may point to conserved chromosome arrangements inherited from the karyotype of the Salmoninae ancestor. In the future, it will be interesting to extend this approach to other salmonid subfamilies (Thymallinae, Coregoninae) to identify ancestral gene arrangements and investigate the genetic architecture of complex traits at a higher systematic level.