These results are similar to what has been previously observed for OtY1 Stein et al. Permissions Icon Permissions. Teleosts display the full gamut of sex determination mechanisms from hermaphroditism to strictly gonochoristic with either male or female heterogamety to environmental sex determination Devlin and Nagahama ; Mank and Avise ; Bachtrog et al.
As is common with most fishes that have sex chromosomes those of salmonids have a small sex-specific region and large pseudoautosomal regions Devlin and Nagahama Salmonids have experienced whole sex chromosome and sex determination in Burlington Robertsonian fusions and fissions during their evolutionary history Hartely Fin clips and gametes were sampled from adult fall-run Chinook salmon at the Merced River Fish Hatchery in November
Sex Chromosomes Z-W. To further understand chromosomal rearrangements that took place in the lineage leading to A. Infernal 1. We used A. This distorted pattern of X heterozygosity can be explained by the fact that the RAD data were derived from F2 hermaphrodite progenitors left to propagate for generations, and there is no X recombination in hermaphrodites Tandonnet et al.
Pandian T. A contemporary linkage mapping study in Chinook salmon using the rainbow trout LG7 markers has subsequently confirmed that they are sex linked in Chinook Naish K, personal communication. Chromosomal differences between European and North American Atlantic salmon discovered by linkage mapping and supported by fluorescence in situ hybridization analysis.
Therefore, it appears that there may be more to the story of sex sex chromosome and sex determination in Burlington in salmonids than just the presence of the sdY gene. Abstract The species complex Astyanax scabripinnis is one of the most studied with respect to origin, distribution, and frequency of B chromosomes, and is considered a model organism for evolutionary studies.
Email alerts Article activity alert. FISH analysis was performed as described in Stein et al.
Histological procedures were performed to confirm the individual sex and classification of the maturation stage of gonadal development. A contemporary linkage mapping study in Chinook salmon using the rainbow trout LG7 markers has subsequently confirmed that they are sex linked in Chinook Naish K, personal communication.
Rapid communication: thirty-eight polymorphic microsatellite markers for mapping in rainbow trout. This is an open-access article distributed under the terms of the Creative Commons Attribution 4.