Abstract:
BACKGROUND:Two strains of the silver fox (Vulpes vulpes), with markedly different behavioral phenotypes, have been developed by long-term selection for behavior. Foxes from the tame strain exhibit friendly behavior towards humans, paralleling the sociability of canine puppies, whereas foxes from the aggressive strain are defensive and exhibit aggression to humans. To understand the genetic differences underlying these behavioral phenotypes fox-specific genomic resources are needed. RESULTS:cDNA from mRNA from pre-frontal cortex of a tame and an aggressive fox was sequenced using the Roche 454 FLX Titanium platform (> 2.5 million reads & 0.9 Gbase of tame fox sequence; >3.3 million reads & 1.2 Gbase of aggressive fox sequence). Over 80% of the fox reads were assembled into contigs. Mapping fox reads against the fox transcriptome assembly and the dog genome identified over 30,000 high confidence fox-specific SNPs. Fox transcripts for approximately 14,000 genes were identified using SwissProt and the dog RefSeq databases. An at least 2-fold expression difference between the two samples (p < 0.05) was observed for 335 genes, fewer than 3% of the total number of genes identified in the fox transcriptome. CONCLUSIONS:Transcriptome sequencing significantly expanded genomic resources available for the fox, a species without a sequenced genome. In a very cost efficient manner this yielded a large number of fox-specific SNP markers for genetic studies and provided significant insights into the gene expression profile of the fox pre-frontal cortex; expression differences between the two fox samples; and a catalogue of potentially important gene-specific sequence variants. This result demonstrates the utility of this approach for developing genomic resources in species with limited genomic information.
journal_name
BMC Genomicsjournal_title
BMC genomicsauthors
Kukekova AV,Johnson JL,Teiling C,Li L,Oskina IN,Kharlamova AV,Gulevich RG,Padte R,Dubreuil MM,Vladimirova AV,Shepeleva DV,Shikhevich SG,Sun Q,Ponnala L,Temnykh SV,Trut LN,Acland GMdoi
10.1186/1471-2164-12-482subject
Has Abstractpub_date
2011-10-03 00:00:00pages
482issn
1471-2164pii
1471-2164-12-482journal_volume
12pub_type
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