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Published on: September 16, 2018
Y-specific sequences and polymorphisms in rainbow trout and Chinook salmon
Joseph P Brunelli1, Kelsey J Wertzler, Kyle Sundin
1School of Biological Sciences and Center for Reproductive Biology, Washington State University, Pullman, WA 99164-4236, USA.
Genome
|September 6, 2008
Summary
This study identifies new Y-chromosome markers in Chinook salmon and rainbow trout, aiding in genetic sex identification and understanding salmonid sex chromosome evolution.
Area of Science:
- Genetics
- Evolutionary Biology
- Aquaculture
Background:
- Understanding the evolution of sex chromosomes and sex determination mechanisms in salmonids is crucial.
- Accurate genetic sexing methods are needed for salmonid species.
Purpose of the Study:
- To explore Y-chromosome-specific sequences in Chinook salmon and rainbow trout.
- To develop new Y-specific markers for genetic sexing and population studies.
- To investigate Y-chromosome homologies between Chinook salmon and rainbow trout.
Main Methods:
- Sequencing of Y-chromosome-specific regions in Chinook salmon (Oncorhynchus tshawytscha) and rainbow trout (Oncorhynchus mykiss).
- Development and PCR-based detection of new Y-specific markers (OtY3 and OmyY1).
- Amplified Fragment Length Polymorphism (AFLP) analysis in Chinook salmon.
Main Results:
- First confirmed Y-specific sequence for rainbow trout identified.
- New Y-specific markers (OtY3 for Chinook salmon, OmyY1 for rainbow trout) developed, which also yield autosomal control products.
- A potential additional Y-chromosome marker identified in Chinook salmon via AFLP analysis.
Conclusions:
- The developed markers facilitate genotypic sexing in Chinook salmon and rainbow trout.
- These markers are valuable for population studies on Y-chromosome polymorphisms.
- The findings suggest a potentially common sex-determining mechanism between these salmonid species.
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