Genome size and karyotype evolution in the slipper orchids (Cypripedioideae: Orchidaceae)
Nuclear DNA contents (4C) were estimated by Feulgen microdensitometry in 27 species of slipper orchids. These data and recent information concerning the molecular systematics of Cypripedioideae allow an interesting re-evaluation of karyotype and genome size variation among slipper orchids in a phylo...
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Veröffentlicht in: | American journal of botany 1998-05, Vol.85 (5), p.681-687 |
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description | Nuclear DNA contents (4C) were estimated by Feulgen microdensitometry in 27 species of slipper orchids. These data and recent information concerning the molecular systematics of Cypripedioideae allow an interesting re-evaluation of karyotype and genome size variation among slipper orchids in a phylogenetic context. DNA amounts differed 5.7-fold, from 24.4 pg in Phragmipedium longifolium to 138 1 pg in Paphiopedilum wardii. The most derived clades of the conduplicate-leaved slipper orchids have undergone a radical process of genome fragmentation that is most parsimoniously explained by Robertsonian changes involving centric fission This process seems to have occurred independently of genome size variation However, it may reflect environmental or selective pressures favoring higher numbers of linkage groups in the karyotype. |
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These data and recent information concerning the molecular systematics of Cypripedioideae allow an interesting re-evaluation of karyotype and genome size variation among slipper orchids in a phylogenetic context. DNA amounts differed 5.7-fold, from 24.4 pg in Phragmipedium longifolium to 138 1 pg in Paphiopedilum wardii. The most derived clades of the conduplicate-leaved slipper orchids have undergone a radical process of genome fragmentation that is most parsimoniously explained by Robertsonian changes involving centric fission This process seems to have occurred independently of genome size variation However, it may reflect environmental or selective pressures favoring higher numbers of linkage groups in the karyotype.</description><identifier>ISSN: 0002-9122</identifier><identifier>EISSN: 1537-2197</identifier><identifier>DOI: 10.2307/2446538</identifier><identifier>PMID: 21684950</identifier><identifier>CODEN: AJBOAA</identifier><language>eng</language><publisher>United States: Botanical Soc America</publisher><subject>Biological taxonomies ; Botany ; centric fission ; Chromosomes ; Cypripedioideae ; Deoxyribonucleic acid ; DNA ; Evolution ; Flowers & plants ; Genera ; Genetics ; Genome size ; Genomes ; Karyotype ; karyotype evolution ; Orchidaceae ; phylogeny ; Plants ; Ploidies ; Slippers ; Systematics</subject><ispartof>American journal of botany, 1998-05, Vol.85 (5), p.681-687</ispartof><rights>Copyright 1998 Botanical Society of America, Inc.</rights><rights>1998 Botanical Society of America</rights><rights>Copyright Botanical Society of America, Inc. 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These data and recent information concerning the molecular systematics of Cypripedioideae allow an interesting re-evaluation of karyotype and genome size variation among slipper orchids in a phylogenetic context. DNA amounts differed 5.7-fold, from 24.4 pg in Phragmipedium longifolium to 138 1 pg in Paphiopedilum wardii. The most derived clades of the conduplicate-leaved slipper orchids have undergone a radical process of genome fragmentation that is most parsimoniously explained by Robertsonian changes involving centric fission This process seems to have occurred independently of genome size variation However, it may reflect environmental or selective pressures favoring higher numbers of linkage groups in the karyotype.</description><subject>Biological taxonomies</subject><subject>Botany</subject><subject>centric fission</subject><subject>Chromosomes</subject><subject>Cypripedioideae</subject><subject>Deoxyribonucleic acid</subject><subject>DNA</subject><subject>Evolution</subject><subject>Flowers & plants</subject><subject>Genera</subject><subject>Genetics</subject><subject>Genome size</subject><subject>Genomes</subject><subject>Karyotype</subject><subject>karyotype evolution</subject><subject>Orchidaceae</subject><subject>phylogeny</subject><subject>Plants</subject><subject>Ploidies</subject><subject>Slippers</subject><subject>Systematics</subject><issn>0002-9122</issn><issn>1537-2197</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1998</creationdate><recordtype>article</recordtype><recordid>eNp9kd2L1DAUxYMo7riK_4BIEPx6qOa7iW_roKuysC_64FNI21snY9t0k9Yy_vVmZ8YVBH26XO6Pc7jnIPSQkleMk_I1E0JJrm-hFZW8LBg15W20IoSwwlDGTtC9lLZ5NcKwu-iEUaWFkWSFvp7DEHrAyf8E7IYGf3dxF6bdCBh-hG6efBiwH_C0yUznxxEiDrHe-CbhF-vdGP0IjQ--AQdv8OX-4uq8vLyP7rSuS_DgOE_Rl_fvPq8_FBeX5x_XZxdFLQylhdFOaVC0At6y_ETrSqKkrFoHnIqmplVZVqWipnGiZc4xyg1Ix03VOE415afo-UF3jOFqhjTZ3qcaus4NEOZkdclzAlKoTD77L0lVTieHlMEnf4HbMMchf2EZlVoLvoeOvnUMKUVobQ6jz-lZSux1KfZYSiYfH-XmqofmhvvdQgaKA7D4Dnb_0rFnn94yovYvPzrw2zSF-Efvxu_p4bzx3zaLj2BT77ouu1O7LIuWVtprmV_tnqjI</recordid><startdate>199805</startdate><enddate>199805</enddate><creator>Cox, AV</creator><creator>Abdelnour, GJ</creator><creator>Bennett, MD</creator><creator>Leitch, IJ</creator><general>Botanical Soc America</general><general>American Botanical Society</general><general>Botanical Society of America, Inc</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QL</scope><scope>7SN</scope><scope>7SS</scope><scope>7ST</scope><scope>7U9</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>H94</scope><scope>M7N</scope><scope>P64</scope><scope>RC3</scope><scope>SOI</scope><scope>7X8</scope></search><sort><creationdate>199805</creationdate><title>Genome size and karyotype evolution in the slipper orchids (Cypripedioideae: Orchidaceae)</title><author>Cox, AV ; Abdelnour, GJ ; Bennett, MD ; Leitch, IJ</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4911-98a68e61be3f2465fa70655bfae314dc1b77b7619da4f2aa2139e5a39bda31813</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1998</creationdate><topic>Biological taxonomies</topic><topic>Botany</topic><topic>centric fission</topic><topic>Chromosomes</topic><topic>Cypripedioideae</topic><topic>Deoxyribonucleic acid</topic><topic>DNA</topic><topic>Evolution</topic><topic>Flowers & plants</topic><topic>Genera</topic><topic>Genetics</topic><topic>Genome size</topic><topic>Genomes</topic><topic>Karyotype</topic><topic>karyotype evolution</topic><topic>Orchidaceae</topic><topic>phylogeny</topic><topic>Plants</topic><topic>Ploidies</topic><topic>Slippers</topic><topic>Systematics</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Cox, AV</creatorcontrib><creatorcontrib>Abdelnour, GJ</creatorcontrib><creatorcontrib>Bennett, MD</creatorcontrib><creatorcontrib>Leitch, IJ</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>Bacteriology Abstracts (Microbiology B)</collection><collection>Ecology Abstracts</collection><collection>Entomology Abstracts (Full archive)</collection><collection>Environment Abstracts</collection><collection>Virology and AIDS Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>AIDS and Cancer Research Abstracts</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Genetics Abstracts</collection><collection>Environment Abstracts</collection><collection>MEDLINE - Academic</collection><jtitle>American journal of botany</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Cox, AV</au><au>Abdelnour, GJ</au><au>Bennett, MD</au><au>Leitch, IJ</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Genome size and karyotype evolution in the slipper orchids (Cypripedioideae: Orchidaceae)</atitle><jtitle>American journal of botany</jtitle><addtitle>Am J Bot</addtitle><date>1998-05</date><risdate>1998</risdate><volume>85</volume><issue>5</issue><spage>681</spage><epage>687</epage><pages>681-687</pages><issn>0002-9122</issn><eissn>1537-2197</eissn><coden>AJBOAA</coden><abstract>Nuclear DNA contents (4C) were estimated by Feulgen microdensitometry in 27 species of slipper orchids. These data and recent information concerning the molecular systematics of Cypripedioideae allow an interesting re-evaluation of karyotype and genome size variation among slipper orchids in a phylogenetic context. DNA amounts differed 5.7-fold, from 24.4 pg in Phragmipedium longifolium to 138 1 pg in Paphiopedilum wardii. The most derived clades of the conduplicate-leaved slipper orchids have undergone a radical process of genome fragmentation that is most parsimoniously explained by Robertsonian changes involving centric fission This process seems to have occurred independently of genome size variation However, it may reflect environmental or selective pressures favoring higher numbers of linkage groups in the karyotype.</abstract><cop>United States</cop><pub>Botanical Soc America</pub><pmid>21684950</pmid><doi>10.2307/2446538</doi><tpages>7</tpages></addata></record> |
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subjects | Biological taxonomies Botany centric fission Chromosomes Cypripedioideae Deoxyribonucleic acid DNA Evolution Flowers & plants Genera Genetics Genome size Genomes Karyotype karyotype evolution Orchidaceae phylogeny Plants Ploidies Slippers Systematics |
title | Genome size and karyotype evolution in the slipper orchids (Cypripedioideae: Orchidaceae) |
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