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A first generation integrated map of the rainbow trout genome
Yniv Palti1, Carine Genet, Ming-Cheng Luo
1National Center for Cool and Cold Water Aquaculture, ARS-USDA, Kearneysville, WV 25430, USA. yniv.palti@ars.usda.gov
BMC Genomics
|April 9, 2011
Summary
A new integrated genome map for rainbow trout (Oncorhynchus mykiss) has been developed. This resource aids genetic improvement in aquaculture and advances genomic research for this important fish species.
Area of Science:
- Aquaculture Genomics
- Fish Genetics
- Comparative Genomics
Background:
- Rainbow trout (Oncorhynchus mykiss) is a globally significant aquaculture species and a key research model.
- Genetic improvement for aquaculture production traits is crucial.
- Existing quantitative trait loci (QTL) require further fine-mapping and candidate gene identification.
Purpose of the Study:
- To develop an integrated physical and genetic map for the rainbow trout genome.
- To facilitate fine mapping of QTL and marker-assisted selection (MAS) for aquaculture improvement.
- To provide a foundational resource for advanced genomic analyses.
Main Methods:
- Construction of an integrated genome map using 238 BAC contigs.
- Anchoring contigs to chromosomes via BAC end sequences (BES) and single nucleotide polymorphisms (SNPs).
- Integration with existing genetic maps from NCCCWA and INRA.
Main Results:
- The first-generation integrated map covers over 10% of the rainbow trout genome across all 29 chromosomes.
- 238 BAC contigs were anchored to chromosomes, with 203 linked to the NCCCWA map and 35 to the INRA map.
- Physical to genetic distance ratios varied, averaging 3,033 Kb/cM.
Conclusions:
- The integrated map serves as a robust framework for a composite rainbow trout genome map.
- This genomic resource is essential for research, comparative mapping, and whole-genome sequencing efforts.
- Facilitates marker-assisted selection for enhanced aquaculture production traits.
