Bursts and horizontal evolution of DNA transposons in the speciation of pseudotetraploid salmonids
Abstract Background Several genome duplications have occurred in the evolutionary history of teleost fish. In returning to a stable diploid state, the polyploid genome reorganized, and large portions are lost, while the fish lines evolved to numerous species. Large scale transposon movement has been...
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ftdoajarticles:oai:doaj.org/article:fb06ce9c4a4d4cca884e6416302e780a 2023-05-15T18:09:48+02:00 Bursts and horizontal evolution of DNA transposons in the speciation of pseudotetraploid salmonids Davidson William S Yazawa Ryosuke de Boer Johan G Koop Ben F 2007-11-01T00:00:00Z https://doi.org/10.1186/1471-2164-8-422 https://doaj.org/article/fb06ce9c4a4d4cca884e6416302e780a EN eng BMC http://www.biomedcentral.com/1471-2164/8/422 https://doaj.org/toc/1471-2164 doi:10.1186/1471-2164-8-422 1471-2164 https://doaj.org/article/fb06ce9c4a4d4cca884e6416302e780a BMC Genomics, Vol 8, Iss 1, p 422 (2007) Biotechnology TP248.13-248.65 Genetics QH426-470 article 2007 ftdoajarticles https://doi.org/10.1186/1471-2164-8-422 2022-12-31T07:24:29Z Abstract Background Several genome duplications have occurred in the evolutionary history of teleost fish. In returning to a stable diploid state, the polyploid genome reorganized, and large portions are lost, while the fish lines evolved to numerous species. Large scale transposon movement has been postulated to play an important role in the genome reorganization process. We analyzed the DNA sequence of several large loci in Salmo salar and other species for the presence of DNA transposon families. Results We have identified bursts of activity of 14 families of DNA transposons (12 Tc1-like and 2 piggyBac-like families, including 11 novel ones) in genome sequences of Salmo salar . Several of these families have similar sequences in a number of closely and distantly related fish, lamprey, and frog species as well as in the parasite Schistosoma japonicum . Analysis of sequence similarities between copies within the families of these bursts demonstrates several waves of transposition activities coinciding with salmonid species divergence. Tc1-like families show a master gene-like copying process, illustrated by extensive but short burst of copying activity, while the piggyBac-like families show a more random copying pattern. Recent families may include copies with an open reading frame for an active transposase enzyme. Conclusion We have identified defined bursts of transposon activity that make use of master-slave and random mechanisms. The bursts occur well after hypothesized polyploidy events and coincide with speciation events. Parasite-mediated lateral transfer of transposons are implicated. Article in Journal/Newspaper Salmo salar Directory of Open Access Journals: DOAJ Articles BMC Genomics 8 1 422 |
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Directory of Open Access Journals: DOAJ Articles |
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language |
English |
topic |
Biotechnology TP248.13-248.65 Genetics QH426-470 |
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Biotechnology TP248.13-248.65 Genetics QH426-470 Davidson William S Yazawa Ryosuke de Boer Johan G Koop Ben F Bursts and horizontal evolution of DNA transposons in the speciation of pseudotetraploid salmonids |
topic_facet |
Biotechnology TP248.13-248.65 Genetics QH426-470 |
description |
Abstract Background Several genome duplications have occurred in the evolutionary history of teleost fish. In returning to a stable diploid state, the polyploid genome reorganized, and large portions are lost, while the fish lines evolved to numerous species. Large scale transposon movement has been postulated to play an important role in the genome reorganization process. We analyzed the DNA sequence of several large loci in Salmo salar and other species for the presence of DNA transposon families. Results We have identified bursts of activity of 14 families of DNA transposons (12 Tc1-like and 2 piggyBac-like families, including 11 novel ones) in genome sequences of Salmo salar . Several of these families have similar sequences in a number of closely and distantly related fish, lamprey, and frog species as well as in the parasite Schistosoma japonicum . Analysis of sequence similarities between copies within the families of these bursts demonstrates several waves of transposition activities coinciding with salmonid species divergence. Tc1-like families show a master gene-like copying process, illustrated by extensive but short burst of copying activity, while the piggyBac-like families show a more random copying pattern. Recent families may include copies with an open reading frame for an active transposase enzyme. Conclusion We have identified defined bursts of transposon activity that make use of master-slave and random mechanisms. The bursts occur well after hypothesized polyploidy events and coincide with speciation events. Parasite-mediated lateral transfer of transposons are implicated. |
format |
Article in Journal/Newspaper |
author |
Davidson William S Yazawa Ryosuke de Boer Johan G Koop Ben F |
author_facet |
Davidson William S Yazawa Ryosuke de Boer Johan G Koop Ben F |
author_sort |
Davidson William S |
title |
Bursts and horizontal evolution of DNA transposons in the speciation of pseudotetraploid salmonids |
title_short |
Bursts and horizontal evolution of DNA transposons in the speciation of pseudotetraploid salmonids |
title_full |
Bursts and horizontal evolution of DNA transposons in the speciation of pseudotetraploid salmonids |
title_fullStr |
Bursts and horizontal evolution of DNA transposons in the speciation of pseudotetraploid salmonids |
title_full_unstemmed |
Bursts and horizontal evolution of DNA transposons in the speciation of pseudotetraploid salmonids |
title_sort |
bursts and horizontal evolution of dna transposons in the speciation of pseudotetraploid salmonids |
publisher |
BMC |
publishDate |
2007 |
url |
https://doi.org/10.1186/1471-2164-8-422 https://doaj.org/article/fb06ce9c4a4d4cca884e6416302e780a |
genre |
Salmo salar |
genre_facet |
Salmo salar |
op_source |
BMC Genomics, Vol 8, Iss 1, p 422 (2007) |
op_relation |
http://www.biomedcentral.com/1471-2164/8/422 https://doaj.org/toc/1471-2164 doi:10.1186/1471-2164-8-422 1471-2164 https://doaj.org/article/fb06ce9c4a4d4cca884e6416302e780a |
op_doi |
https://doi.org/10.1186/1471-2164-8-422 |
container_title |
BMC Genomics |
container_volume |
8 |
container_issue |
1 |
container_start_page |
422 |
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1766182472232468480 |