Tetraploidy and the Evolution of Salmonid Fishes

Allendorf, Fred W.; Thorgaard, Gary H.

doi:10.1007/978-1-4684-4652-4_1

Cited by 722 publications

(757 citation statements)

References 126 publications

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“…The inclusion in the phylogenetic analysis performed in the present work of all know trout sequences, along with CPT1-like sequences from pufferfish and zebrafish, suggests that the sea bream protein is more closely related to the mammalian muscle CPT1 isoform, CPT1B. Furthermore, it reveals the potential complexity of the CPT1 system in fish, which it may be even more accentuated in species such as trout with a recently duplicated genome (Allendorf and Thorgaard, 1984). Thus we show that fish species possess multiple CPT1 genes, including a homlogue of mammalian CPT1B and up to four genes similar to mammalian CPT1A.…”

Section: Discussionmentioning

confidence: 76%

Molecular characterization of a gilthead sea bream (Sparus aurata) muscle tissue cDNA for carnitine palmitoyltransferase 1B (CPT1B)

Boukouvala

Leaver

Favre-Krey

et al. 2010

Comparative Biochemistry and Physiology Part B: Biochemistry an

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Understanding the control of piscine fatty acid metabolism is important for determining the nutritional requirements of fish, and hence for the production of optimal aquaculture diets. The regulation and expression of carnitine palmitoyltransferase 1 (CPT1; EC No 2.3.1.21) are critical processes in the control fatty acid metabolism, and here we report a cDNA from gilthead sea bream (Sparus aurata) which encodes a protein with high identity to vertebrate CPT1. This sea bream CPT1 mRNA is predominantly expressed in skeletal and cardiac muscle, with little expression in other tissues. Phylogenetic analysis of other vertebrate CPT1 sequences show that fish genomes contain a single gene related to mammalian CPT1B, and a further two multi-gene families related to mammalian CPT1A. Genes related to mammalian CPT1C are absent in fish. Therefore, based on both functional and evolutionary orthology to mammalian CPT1B, the sea bream CPT1 reported here is a CPT1B isoform. Sea bream CPT1B mRNA expression progressively decreases in heart and muscle up to 12 hours after last feeding, but returns to initial, non-fasted levels after 72 hours. In contrast, in liver non-fasted expression is low, but strongly increases at 24 and 72 hours after last feeding. In white muscle and liver, CPT1B mRNA expression is highly correlated with the expression of peroxisomal proliferator-activated receptor (PPAR ).Thus fatty acid metabolism by CPT1B and its control by PPARs is similar in fish and mammals, but multiple genes for CPT1A-like proteins in fish also suggest different and more complex pathways of lipid utilisation than in mammals.

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Section: Discussionmentioning

confidence: 76%

Molecular characterization of a gilthead sea bream (Sparus aurata) muscle tissue cDNA for carnitine palmitoyltransferase 1B (CPT1B)

Boukouvala

Leaver

Favre-Krey

et al. 2010

Comparative Biochemistry and Physiology Part B: Biochemistry an

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“…In plants, polyploidy has been confirmed to be ubiquitous (Jiao et al, 2011;te Beest et al, 2012). In comparison with the prevalent incidence in plants, polyploid species or forms are very rare in vertebrates including fishes and amphibians (Gui and Zhou, 2010;Otto, 2007), but some polyploid members have passed through a bottleneck of polyploidy instability in some teleost fish lineages including cyprinids, catostomids, salmonids, and cobitids, and formed diploid species via diploidization (Allendorf and Thorgaard, 1984;Gui and Zhou, 2010;Saitoh et al, 2010;Yang and Gui, 2004). Therefore, polyploidy has been a vital evolutionary force and plays important roles in fish evolution and speciation (Luo et al, 2007;Mungpakdee et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

Evolutionary history of two divergent Dmrt1 genes reveals two rounds of polyploidy origins in gibel carp

Zhang

et al. 2014

Molecular Phylogenetics and Evolution

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“…Local adaptation has been extensively studied in the salmonid family, to which Arctic charr belongs 26 . The family is estimated to be between 63.2 and 58.1 million years old 27, 28 . A whole genome duplication event occurred before the radiation of the salmonid family 29– 32 which has provided time for divergence of ohnologous genes (paralogous genes originated by whole genome duplication event).…”

Section: Introductionmentioning

confidence: 99%

The developmental transcriptome of contrasting Arctic charr (Salvelinus alpinus) morphs

et al. 2015

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Species and populations with parallel evolution of specific traits can help illuminate how predictable adaptations and divergence are at the molecular and developmental level. Following the last glacial period, dwarfism and specialized bottom feeding morphology evolved rapidly in several landlocked Arctic charr Salvelinus alpinus populations in Iceland. To study the genetic divergence between small benthic morphs and limnetic morphs, we conducted RNA-sequencing charr embryos at four stages in early development. We studied two stocks with contrasting morphologies: the small benthic (SB) charr from Lake Thingvallavatn and Holar aquaculture (AC) charr.The data reveal significant differences in expression of several biological pathways during charr development. There was also an expression difference between SB- and AC-charr in genes involved in energy metabolism and blood coagulation genes. We confirmed differing expression of five genes in whole embryos with qPCR, including lysozyme and natterin-like which was previously identified as a fish-toxin of a lectin family that may be a putative immunopeptide. We also verified differential expression of 7 genes in the developing head that associated consistently with benthic v.s.limnetic morphology (studied in 4 morphs). Comparison of single nucleotide polymorphism (SNP) frequencies reveals extensive genetic differentiation between the SB and AC-charr (~1300 with more than 50% frequency difference). Curiously, three derived alleles in the otherwise conserved 12s and 16s mitochondrial ribosomal RNA genes are found in benthic charr.The data implicate multiple genes and molecular pathways in divergence of small benthic charr and/or the response of aquaculture charr to domestication. Functional, genetic and population genetic studies on more freshwater and anadromous populations are needed to confirm the specific loci and mutations relating to specific ecological traits in Arctic charr.

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Tetraploidy and the Evolution of Salmonid Fishes

Cited by 722 publications

References 126 publications

Molecular characterization of a gilthead sea bream (Sparus aurata) muscle tissue cDNA for carnitine palmitoyltransferase 1B (CPT1B)

Molecular characterization of a gilthead sea bream (Sparus aurata) muscle tissue cDNA for carnitine palmitoyltransferase 1B (CPT1B)

Evolutionary history of two divergent Dmrt1 genes reveals two rounds of polyploidy origins in gibel carp

The developmental transcriptome of contrasting Arctic charr (Salvelinus alpinus) morphs

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