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Elimination and rearrangement of parental rDNA in the allotetraploid Nicotiana tabacum
Origin and rearrangement of ribosomal DNA repeats in natural allotetraploid Nicotiana tabacum are described. Comparative sequence analysis of the intergenic spacer (IGS) regions of Nicotiana tomentosiformis (the paternal diploid progenitor) and Nicotiana sylvestris (the maternal diploid progenitor)...
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Published in: | Molecular biology and evolution 1999-03, Vol.16 (3), p.311-320 |
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creator | Volkov, R A Borisjuk, N V Panchuk, I I Schweizer, D Hemleben, V |
description | Origin and rearrangement of ribosomal DNA repeats in natural allotetraploid Nicotiana tabacum are described. Comparative sequence analysis of the intergenic spacer (IGS) regions of Nicotiana tomentosiformis (the paternal diploid progenitor) and Nicotiana sylvestris (the maternal diploid progenitor) showed species-specific molecular features. These markers allowed us to trace the molecular evolution of parental rDNA in the allopolyploid genome of N. tabacum; at least the majority of tobacco rDNA repeats originated from N. tomentosiformis, which endured reconstruction of subrepeated regions in the IGS. We infer that after hybridization of the parental diploid species, rDNA with a longer IGS, donated by N. tomentosiformis, dominated over the rDNA with a shorter IGS from N. sylvestris; the latter was then eliminated from the allopolyploid genome. Thus, repeated sequences in allopolyploid genomes are targets for molecular rearrangement, demonstrating the dynamic nature of allopolyploid genomes. |
doi_str_mv | 10.1093/oxfordjournals.molbev.a026112 |
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Comparative sequence analysis of the intergenic spacer (IGS) regions of Nicotiana tomentosiformis (the paternal diploid progenitor) and Nicotiana sylvestris (the maternal diploid progenitor) showed species-specific molecular features. These markers allowed us to trace the molecular evolution of parental rDNA in the allopolyploid genome of N. tabacum; at least the majority of tobacco rDNA repeats originated from N. tomentosiformis, which endured reconstruction of subrepeated regions in the IGS. We infer that after hybridization of the parental diploid species, rDNA with a longer IGS, donated by N. tomentosiformis, dominated over the rDNA with a shorter IGS from N. sylvestris; the latter was then eliminated from the allopolyploid genome. 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Comparative sequence analysis of the intergenic spacer (IGS) regions of Nicotiana tomentosiformis (the paternal diploid progenitor) and Nicotiana sylvestris (the maternal diploid progenitor) showed species-specific molecular features. These markers allowed us to trace the molecular evolution of parental rDNA in the allopolyploid genome of N. tabacum; at least the majority of tobacco rDNA repeats originated from N. tomentosiformis, which endured reconstruction of subrepeated regions in the IGS. We infer that after hybridization of the parental diploid species, rDNA with a longer IGS, donated by N. tomentosiformis, dominated over the rDNA with a shorter IGS from N. sylvestris; the latter was then eliminated from the allopolyploid genome. Thus, repeated sequences in allopolyploid genomes are targets for molecular rearrangement, demonstrating the dynamic nature of allopolyploid genomes.</description><subject>Base Sequence</subject><subject>DNA, Plant - genetics</subject><subject>DNA, Ribosomal - genetics</subject><subject>Evolution, Molecular</subject><subject>Gene Rearrangement</subject><subject>Genome, Plant</subject><subject>Molecular Sequence Data</subject><subject>Nicotiana - genetics</subject><subject>Nicotiana sylvestris</subject><subject>Nicotiana tabacum</subject><subject>Nicotiana tomentosiformis</subject><subject>Plants, Toxic</subject><subject>Polymorphism, Genetic</subject><subject>Polyploidy</subject><subject>Repetitive Sequences, Nucleic Acid</subject><subject>Restriction Mapping</subject><subject>Sequence Homology, Nucleic Acid</subject><subject>Species Specificity</subject><issn>0737-4038</issn><issn>1537-1719</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1999</creationdate><recordtype>article</recordtype><recordid>eNpVkEtPwzAQhC0EoqXwF5AvcEvxxnk4Bw4VlIdUlQtwjTaODa4cuzgOgn9PUHuAw2rnMLM7-gi5ADYHVvEr_6V9aDd-CA5tP--8bdTnHFlaAKQHZAo5LxMooTokU1aOOmNcTMhJ328YgywrimMyAcY5pLmYktelNZ1xGI13FF1Lg8IQ0L2pTrlIvaZbDKNCS8PtekGNo_FdUbTWRxUDbq03LV0b6aNBhzRig3LoTsmRHuups_2ekZe75fPNQ7J6un-8WawSmZU8JlqmOtWi5EwylbeV5iIVQhQcqgwlSAWFYpXgZauBt5nONROpbiBDLLIKFZ-Ry93dbfAfg-pj3ZleKmvRKT_0NZQpH6cYjdc7owy-74PS9TaYDsN3Daz-BVv_B1vvwNZ7sGP-fP9oaDrV_knvSPIfX399oA</recordid><startdate>19990301</startdate><enddate>19990301</enddate><creator>Volkov, R A</creator><creator>Borisjuk, N V</creator><creator>Panchuk, I I</creator><creator>Schweizer, D</creator><creator>Hemleben, V</creator><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FD</scope><scope>FR3</scope><scope>P64</scope><scope>RC3</scope></search><sort><creationdate>19990301</creationdate><title>Elimination and rearrangement of parental rDNA in the allotetraploid Nicotiana tabacum</title><author>Volkov, R A ; Borisjuk, N V ; Panchuk, I I ; Schweizer, D ; Hemleben, V</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c473t-fc2f2f8730c0e5d9f38288863194ac1ce16e09837df13d4f5f082fb14aa649ae3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1999</creationdate><topic>Base Sequence</topic><topic>DNA, Plant - genetics</topic><topic>DNA, Ribosomal - genetics</topic><topic>Evolution, Molecular</topic><topic>Gene Rearrangement</topic><topic>Genome, Plant</topic><topic>Molecular Sequence Data</topic><topic>Nicotiana - genetics</topic><topic>Nicotiana sylvestris</topic><topic>Nicotiana tabacum</topic><topic>Nicotiana tomentosiformis</topic><topic>Plants, Toxic</topic><topic>Polymorphism, Genetic</topic><topic>Polyploidy</topic><topic>Repetitive Sequences, Nucleic Acid</topic><topic>Restriction Mapping</topic><topic>Sequence Homology, Nucleic Acid</topic><topic>Species Specificity</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Volkov, R A</creatorcontrib><creatorcontrib>Borisjuk, N V</creatorcontrib><creatorcontrib>Panchuk, I I</creatorcontrib><creatorcontrib>Schweizer, D</creatorcontrib><creatorcontrib>Hemleben, V</creatorcontrib><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Genetics Abstracts</collection><jtitle>Molecular biology and evolution</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Volkov, R A</au><au>Borisjuk, N V</au><au>Panchuk, I I</au><au>Schweizer, D</au><au>Hemleben, V</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Elimination and rearrangement of parental rDNA in the allotetraploid Nicotiana tabacum</atitle><jtitle>Molecular biology and evolution</jtitle><addtitle>Mol Biol Evol</addtitle><date>1999-03-01</date><risdate>1999</risdate><volume>16</volume><issue>3</issue><spage>311</spage><epage>320</epage><pages>311-320</pages><issn>0737-4038</issn><eissn>1537-1719</eissn><abstract>Origin and rearrangement of ribosomal DNA repeats in natural allotetraploid Nicotiana tabacum are described. Comparative sequence analysis of the intergenic spacer (IGS) regions of Nicotiana tomentosiformis (the paternal diploid progenitor) and Nicotiana sylvestris (the maternal diploid progenitor) showed species-specific molecular features. These markers allowed us to trace the molecular evolution of parental rDNA in the allopolyploid genome of N. tabacum; at least the majority of tobacco rDNA repeats originated from N. tomentosiformis, which endured reconstruction of subrepeated regions in the IGS. We infer that after hybridization of the parental diploid species, rDNA with a longer IGS, donated by N. tomentosiformis, dominated over the rDNA with a shorter IGS from N. sylvestris; the latter was then eliminated from the allopolyploid genome. Thus, repeated sequences in allopolyploid genomes are targets for molecular rearrangement, demonstrating the dynamic nature of allopolyploid genomes.</abstract><cop>United States</cop><pmid>10331258</pmid><doi>10.1093/oxfordjournals.molbev.a026112</doi><tpages>10</tpages><oa>free_for_read</oa></addata></record> |
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subjects | Base Sequence DNA, Plant - genetics DNA, Ribosomal - genetics Evolution, Molecular Gene Rearrangement Genome, Plant Molecular Sequence Data Nicotiana - genetics Nicotiana sylvestris Nicotiana tabacum Nicotiana tomentosiformis Plants, Toxic Polymorphism, Genetic Polyploidy Repetitive Sequences, Nucleic Acid Restriction Mapping Sequence Homology, Nucleic Acid Species Specificity |
title | Elimination and rearrangement of parental rDNA in the allotetraploid Nicotiana tabacum |
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