Joseph P. Brunelli

Cutthroat Trout: Evolutionary Biology and Taxonomy

Joseph P. Brunelli

Abstract.—A Y chromosome marker shared with Rainbow Trout Oncorhynchus mykiss has been sequenced in many Cutthroat Trout O. clarkii subspecies. The marker is found in and inherited through males. It evolves more slowly than the maternally inherited mitochondrial DNA. The marker delineates …

Y Chromosome DNA Variation in Cutthroat Trout

Joseph P. Brunelli

Antipredator Behavior QTL: Differences in Rainbow Trout Clonal Lines Derived from Wild and Hatchery Populations

Kris A. Christensen, Joseph P. Brunelli, Paul A. Wheeler, Gary H. Thorgaard

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Identification of single nucleotide polymorphisms from the transcriptome of an organism with a whole genome duplication

Kris A. Christensen, Joseph P. Brunelli, Matthew J. Lambert, Jenefer DeKoning et autres

BACKGROUND: The common ancestor of salmonid fishes, including rainbow trout (Oncorhynchus mykiss), experienced a whole genome duplication between 20 and 100 million years ago, and many of the duplicated genes have been retained in the trout genome. This retention complicates efforts to …

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Characterization of the OmyY1 Region on the Rainbow Trout Y Chromosome

Ruth Brosi Phillips, Jenefer DeKoning, Joseph P. Brunelli, Joshua J. Faber-Hammond et autres

We characterized the male-specific region on the Y chromosome of rainbow trout, which contains both sdY (the sex-determining gene) and the male-specific genetic marker, OmyY1. Several clones containing the OmyY1 marker were screened from a BAC library from a YY clonal line …

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Y chromosome phylogeny for cutthroat trout (Oncorhynchus clarkii) subspecies is generally concordant with those of other markers

Joseph P. Brunelli, Jon M. Mallatt, Robb F. Leary, Mahmoud A. Alfaqih et autres

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A conserved haplotype controls parallel adaptation in geographically distant salmonid populations

Michael Ryan Miller, Joseph P. Brunelli, Paul A. Wheeler, Sixin Liu et autres

Salmonid fishes exhibit extensive local adaptations owing to abundant environmental variation and precise natal homing. This extensive local adaptation makes conservation and restoration of salmonids a challenge. For example, defining unambiguous units of conservation is difficult, and restoration attempts often fail owing …

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Deep divergence and apparent sex-biased dispersal revealed by a Y-linked marker in rainbow trout

Joseph P. Brunelli, Craig A. Steele, Gary H. Thorgaard

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Mitochondrial Variation and Biogeographic History of Chinook Salmon

Kyle E. Martin, Craig A. Steele, Joseph P. Brunelli, Gary H. Thorgaard

Abstract The genetic variation of many species in the Northern Hemisphere has been influenced by climatic changes during the Pleistocene Epoch. Phylogeographic studies can help determine intraspecific relationships and postglacial recolonization routes for many of these species, potentially leading to a more …

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Mapping of five candidate sex-determining loci in rainbow trout (Oncorhynchus mykiss)

Mahmoud A. Alfaqih, Joseph P. Brunelli, Robert E. Drew, Gary H. Thorgaard

BACKGROUND: Rainbow trout have an XX/XY genetic mechanism of sex determination where males are the heterogametic sex. The homology of the sex-determining gene (SDG) in medaka to Dmrt1 suggested that SDGs evolve from downstream genes by gene duplication. Orthologous sequences of the …

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Y-specific sequences and polymorphisms in rainbow trout and Chinook salmon

Joseph P. Brunelli, Kelsey J. Wertzler, Kyle Sundin, Gary H. Thorgaard

Improved methods for genetically sexing salmonids and for characterization of Y-chromosome homologies between species can contribute to understanding the evolution of sex chromosomes and sex-determining mechanisms. In this study we have explored 12.5 kb of Y-chromosome-specific sequence flanking the previously described OtY2 …

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Single‐Nucleotide Polymorphisms Associated with Allozyme Differences between Inland and Coastal Rainbow Trout

Joseph P. Brunelli, Gary H. Thorgaard, Robb F. Leary, James L. Dunnigan

Abstract Native inland populations of rainbow trout Oncorhynchus mykiss gairdneri, particularly resident populations, often hybridize with introduced populations of the widely cultured coastal form of the species, O. m. irideus. The inland and coastal subspecies differ genetically from each other by allozyme …

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