Hybridization among sympatric species of Rhododendron (Ericaceae) in Turkey: morphological and molecular evidence
Rhododendron (Ericaceae) is a large genus in which barriers to hybridization are especially weak, but many species are maintained in sympatry. Hybridization among four species of Rhododendron subsect. Pontica, which occur in sympatry in Turkey, was investigated. Material of R. ponticum, R. smirnovii...
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Veröffentlicht in: | American journal of botany 1999-12, Vol.86 (12), p.1776-1785 |
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creator | Milne, Richard I. Abbott, Richard J. Wolff, Kirsten Chamberlain, David F. |
description | Rhododendron (Ericaceae) is a large genus in which barriers to hybridization are especially weak, but many species are maintained in sympatry. Hybridization among four species of Rhododendron subsect. Pontica, which occur in sympatry in Turkey, was investigated. Material of R. ponticum, R. smirnovii, R. ungernii, and R. caucasicum and their putative hybrids was collected from the wild. Based on morphology, chloroplast DNA and nuclear ribosomal DNA restriction fragment length polymorphism (RFLP) profiles, each accession was identified as a species or hybrid combination. Five of the six possible hybrid combinations among the four species were detected. Rhododendron ponticum x R. smirnovii was represented by a single individual and R. caucasicum x R. smirnovii by one small group of hybrid plants. The combinations R. ponticum x R. ungernii and R. ungernii x R. smirnovii showed evidence of frequent backcrossing, while R. ponticum x R. caucasicum appeared unusual in that an intermediate hybrid type was abundant, whereas hybrids with phenotypes approaching either parent were rare. Possible explanations of this latter situation are discussed. The results suggest that natural hybridization among Rhododendron species is common and that ecological factors are important in maintaining integrity when species occur in sympatry. |
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Hybridization among four species of Rhododendron subsect. Pontica, which occur in sympatry in Turkey, was investigated. Material of R. ponticum, R. smirnovii, R. ungernii, and R. caucasicum and their putative hybrids was collected from the wild. Based on morphology, chloroplast DNA and nuclear ribosomal DNA restriction fragment length polymorphism (RFLP) profiles, each accession was identified as a species or hybrid combination. Five of the six possible hybrid combinations among the four species were detected. Rhododendron ponticum x R. smirnovii was represented by a single individual and R. caucasicum x R. smirnovii by one small group of hybrid plants. The combinations R. ponticum x R. ungernii and R. ungernii x R. smirnovii showed evidence of frequent backcrossing, while R. ponticum x R. caucasicum appeared unusual in that an intermediate hybrid type was abundant, whereas hybrids with phenotypes approaching either parent were rare. Possible explanations of this latter situation are discussed. The results suggest that natural hybridization among Rhododendron species is common and that ecological factors are important in maintaining integrity when species occur in sympatry.</description><identifier>ISSN: 0002-9122</identifier><identifier>EISSN: 1537-2197</identifier><identifier>DOI: 10.2307/2656674</identifier><identifier>PMID: 10602769</identifier><identifier>CODEN: AJBOAA</identifier><language>eng</language><publisher>United States: Botanical Soc America</publisher><subject>Biological taxonomies ; diploid hybrid speciation ; Ecological genetics ; ecological isolation ; Evolution ; Flowers & plants ; Genetic hybridization ; Hybridity ; hybridization ; introgression ; Plant reproduction ; Plants ; RFLP ; Rhododendron ; Rhododendron caucasicum ; Rhododendron ponticum ; Rhododendron smirnovii ; Rhododendron ungernii ; Ribosomal DNA ; Species ; Sympatric species ; Systematics and Phytogeography ; Turkeys</subject><ispartof>American journal of botany, 1999-12, Vol.86 (12), p.1776-1785</ispartof><rights>Copyright 1999 Botanical Society of America, Inc.</rights><rights>1999 Botanical Society of America</rights><rights>Copyright Botanical Society of America, Inc. Dec 1999</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4936-152fc10dfdc94c5cfda98539be5ede2dbd2f204d3ee54fc1756caaa9271eb1483</citedby><cites>FETCH-LOGICAL-c4936-152fc10dfdc94c5cfda98539be5ede2dbd2f204d3ee54fc1756caaa9271eb1483</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/2656674$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/2656674$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>314,777,781,800,1412,1428,27905,27906,45555,45556,46390,46814,57998,58231</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/10602769$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Milne, Richard I.</creatorcontrib><creatorcontrib>Abbott, Richard J.</creatorcontrib><creatorcontrib>Wolff, Kirsten</creatorcontrib><creatorcontrib>Chamberlain, David F.</creatorcontrib><title>Hybridization among sympatric species of Rhododendron (Ericaceae) in Turkey: morphological and molecular evidence</title><title>American journal of botany</title><addtitle>Am J Bot</addtitle><description>Rhododendron (Ericaceae) is a large genus in which barriers to hybridization are especially weak, but many species are maintained in sympatry. Hybridization among four species of Rhododendron subsect. Pontica, which occur in sympatry in Turkey, was investigated. Material of R. ponticum, R. smirnovii, R. ungernii, and R. caucasicum and their putative hybrids was collected from the wild. Based on morphology, chloroplast DNA and nuclear ribosomal DNA restriction fragment length polymorphism (RFLP) profiles, each accession was identified as a species or hybrid combination. Five of the six possible hybrid combinations among the four species were detected. Rhododendron ponticum x R. smirnovii was represented by a single individual and R. caucasicum x R. smirnovii by one small group of hybrid plants. The combinations R. ponticum x R. ungernii and R. ungernii x R. smirnovii showed evidence of frequent backcrossing, while R. ponticum x R. caucasicum appeared unusual in that an intermediate hybrid type was abundant, whereas hybrids with phenotypes approaching either parent were rare. Possible explanations of this latter situation are discussed. The results suggest that natural hybridization among Rhododendron species is common and that ecological factors are important in maintaining integrity when species occur in sympatry.</description><subject>Biological taxonomies</subject><subject>diploid hybrid speciation</subject><subject>Ecological genetics</subject><subject>ecological isolation</subject><subject>Evolution</subject><subject>Flowers & plants</subject><subject>Genetic hybridization</subject><subject>Hybridity</subject><subject>hybridization</subject><subject>introgression</subject><subject>Plant reproduction</subject><subject>Plants</subject><subject>RFLP</subject><subject>Rhododendron</subject><subject>Rhododendron caucasicum</subject><subject>Rhododendron ponticum</subject><subject>Rhododendron smirnovii</subject><subject>Rhododendron ungernii</subject><subject>Ribosomal DNA</subject><subject>Species</subject><subject>Sympatric species</subject><subject>Systematics and Phytogeography</subject><subject>Turkeys</subject><issn>0002-9122</issn><issn>1537-2197</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1999</creationdate><recordtype>article</recordtype><recordid>eNp90d9v1SAUB3BiNO5uGv8BYxof_PFQBUqh-LYt02mWmJj5TCic3suVlg5ubepfL_PeOGOiTwTOh--BHISeEPyGVli8pbzmXLB7aEXqSpSUSHEfrTDGtJSE0iN0nNI2byWT9CE6IphjKrhcoZvLpY3Ouh9658JQ6D4M6yIt_ah30ZkijWAcpCJ0xZdNsMHCYGN2ry5yVRvQ8LpwQ3E9xW-wvCv6EMdN8GGdi77Qg80nHszkdSzgu8u3DTxCDzrtEzw-rCfo6_uL6_PL8urzh4_np1elYbLiJalpZwi2nTWSmdp0VsumrmQLNVigtrW0o5jZCqBmWYqaG621pIJAS1hTnaCX-9wxhpsJ0k71LhnwXg8QpqQaQVkluWRZvvivJII1hOHbyOd_wW2Y4pB_oSipGyExqe76mhhSitCpMbpex0URrG6HpQ7DyvLZIW5qe7B_uP10Mij3YHYeln_lqNNPZ5QIwbN_uvfbtAvxt7_rd3jZxq03s4ugUq-9z92Jmue54YpQ9SvoJwqds9U</recordid><startdate>199912</startdate><enddate>199912</enddate><creator>Milne, Richard I.</creator><creator>Abbott, Richard J.</creator><creator>Wolff, Kirsten</creator><creator>Chamberlain, David F.</creator><general>Botanical Soc America</general><general>Botanical Society of America</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>199912</creationdate><title>Hybridization among sympatric species of Rhododendron (Ericaceae) in Turkey: morphological and molecular evidence</title><author>Milne, Richard I. ; Abbott, Richard J. ; Wolff, Kirsten ; Chamberlain, David F.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4936-152fc10dfdc94c5cfda98539be5ede2dbd2f204d3ee54fc1756caaa9271eb1483</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1999</creationdate><topic>Biological taxonomies</topic><topic>diploid hybrid speciation</topic><topic>Ecological genetics</topic><topic>ecological isolation</topic><topic>Evolution</topic><topic>Flowers & plants</topic><topic>Genetic hybridization</topic><topic>Hybridity</topic><topic>hybridization</topic><topic>introgression</topic><topic>Plant reproduction</topic><topic>Plants</topic><topic>RFLP</topic><topic>Rhododendron</topic><topic>Rhododendron caucasicum</topic><topic>Rhododendron ponticum</topic><topic>Rhododendron smirnovii</topic><topic>Rhododendron ungernii</topic><topic>Ribosomal DNA</topic><topic>Species</topic><topic>Sympatric species</topic><topic>Systematics and Phytogeography</topic><topic>Turkeys</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Milne, Richard I.</creatorcontrib><creatorcontrib>Abbott, Richard J.</creatorcontrib><creatorcontrib>Wolff, Kirsten</creatorcontrib><creatorcontrib>Chamberlain, David F.</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>Milne, Richard I.</au><au>Abbott, Richard J.</au><au>Wolff, Kirsten</au><au>Chamberlain, David F.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Hybridization among sympatric species of Rhododendron (Ericaceae) in Turkey: morphological and molecular evidence</atitle><jtitle>American journal of botany</jtitle><addtitle>Am J Bot</addtitle><date>1999-12</date><risdate>1999</risdate><volume>86</volume><issue>12</issue><spage>1776</spage><epage>1785</epage><pages>1776-1785</pages><issn>0002-9122</issn><eissn>1537-2197</eissn><coden>AJBOAA</coden><abstract>Rhododendron (Ericaceae) is a large genus in which barriers to hybridization are especially weak, but many species are maintained in sympatry. Hybridization among four species of Rhododendron subsect. Pontica, which occur in sympatry in Turkey, was investigated. Material of R. ponticum, R. smirnovii, R. ungernii, and R. caucasicum and their putative hybrids was collected from the wild. Based on morphology, chloroplast DNA and nuclear ribosomal DNA restriction fragment length polymorphism (RFLP) profiles, each accession was identified as a species or hybrid combination. Five of the six possible hybrid combinations among the four species were detected. Rhododendron ponticum x R. smirnovii was represented by a single individual and R. caucasicum x R. smirnovii by one small group of hybrid plants. The combinations R. ponticum x R. ungernii and R. ungernii x R. smirnovii showed evidence of frequent backcrossing, while R. ponticum x R. caucasicum appeared unusual in that an intermediate hybrid type was abundant, whereas hybrids with phenotypes approaching either parent were rare. Possible explanations of this latter situation are discussed. The results suggest that natural hybridization among Rhododendron species is common and that ecological factors are important in maintaining integrity when species occur in sympatry.</abstract><cop>United States</cop><pub>Botanical Soc America</pub><pmid>10602769</pmid><doi>10.2307/2656674</doi><tpages>10</tpages></addata></record> |
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subjects | Biological taxonomies diploid hybrid speciation Ecological genetics ecological isolation Evolution Flowers & plants Genetic hybridization Hybridity hybridization introgression Plant reproduction Plants RFLP Rhododendron Rhododendron caucasicum Rhododendron ponticum Rhododendron smirnovii Rhododendron ungernii Ribosomal DNA Species Sympatric species Systematics and Phytogeography Turkeys |
title | Hybridization among sympatric species of Rhododendron (Ericaceae) in Turkey: morphological and molecular evidence |
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