Studies in Crataegus (Rosaceae: Maloideae). XIV. The breeding system of Crataegus crus-galli sensu lato in Ontario
Crataegus crus-galli L. sensu lato in southern Ontario is a complex of taxa, two of which appear to consist exclusively of both triploid and tetraploid individuals. While pollen fertility is reduced in triploids, both ploidy levels are characterized by production of eight nucleate aposporous embryo-...
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| Veröffentlicht in: | American journal of botany 1986-01, Vol.73 (1), p.116-130 |
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| creator | Dickinson, T.A Phipps, J.B |
| description | Crataegus crus-galli L. sensu lato in southern Ontario is a complex of taxa, two of which appear to consist exclusively of both triploid and tetraploid individuals. While pollen fertility is reduced in triploids, both ploidy levels are characterized by production of eight nucleate aposporous embryo-sacs and hence remain seed-fertile; in addition, single, apparently sexual, embryo-sacs are found in the ovules of tetraploids. Agamospermy is shown experimentally to be pseudogamous. Polyploidy in C. crus-galli s.l. is accompanied by self-compatibility, in contrast to the self-incompatibility of diploid Crataegus species such as C punctata, with which comparison is made. The weediness of the component taxa of C crus-galli s.l., in general, and their tendency toward uniparental reproduction, in particular, may explain the homogeneity of their topodemes, and the way in which these topodemes may be markedly differentiated from one another even within a single taxon. |
| doi_str_mv | 10.1002/j.1537-2197.1986.tb09687.x |
| format | Article |
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The weediness of the component taxa of C crus-galli s.l., in general, and their tendency toward uniparental reproduction, in particular, may explain the homogeneity of their topodemes, and the way in which these topodemes may be markedly differentiated from one another even within a single taxon.</description><identifier>ISSN: 0002-9122</identifier><identifier>EISSN: 1537-2197</identifier><identifier>DOI: 10.1002/j.1537-2197.1986.tb09687.x</identifier><identifier>PMID: 30139127</identifier><identifier>CODEN: AJBOAA</identifier><language>eng</language><publisher>Ithaca, NY: American Botanical Society</publisher><subject>Apomixis ; Biological and medical sciences ; COMPATIBILITY ; CRATAEGUS ; Diploidy ; FERTILIDAD ; FERTILITE ; FERTILITY ; Fruits ; Fundamental and applied biological sciences. Psychology ; Inflorescences ; ONTARIO ; Ovules ; Plant cytology, morphology, systematics, chorology and evolution ; POLIPLOIDIA ; Pollen ; Pollination ; POLYPLOIDIE ; POLYPLOIDY ; PRODUCCION DE SEMILLAS ; PRODUCTION DE SEMENCES ; REPRODUCCION ; REPRODUCTION ; SEED PRODUCTION ; Spermatophyta ; Systematics (diagnosis, chromosome numbers) ; Taxa ; TETRAPLOIDE ; TETRAPLOIDS ; Tetraploidy ; topodemes ; TRIPLOIDE ; TRIPLOIDS ; Triploidy</subject><ispartof>American journal of botany, 1986-01, Vol.73 (1), p.116-130</ispartof><rights>Copyright 1986 Botanical Society of America, Inc.</rights><rights>1986 Botanical Society of America</rights><rights>1987 INIST-CNRS</rights><rights>1986 Botanical Society of America.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c2917-732fff0629766313eeca66bc71817c28d4764af525a51aadeb0b3d4ba322bdbf3</citedby><cites>FETCH-LOGICAL-c2917-732fff0629766313eeca66bc71817c28d4764af525a51aadeb0b3d4ba322bdbf3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.jstor.org/stable/pdf/2444284$$EPDF$$P50$$Gjstor$$H</linktopdf><linktohtml>$$Uhttps://www.jstor.org/stable/2444284$$EHTML$$P50$$Gjstor$$H</linktohtml><link.rule.ids>314,780,784,803,4024,27923,27924,27925,58017,58250</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=7901873$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/30139127$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Dickinson, T.A</creatorcontrib><creatorcontrib>Phipps, J.B</creatorcontrib><title>Studies in Crataegus (Rosaceae: Maloideae). XIV. The breeding system of Crataegus crus-galli sensu lato in Ontario</title><title>American journal of botany</title><addtitle>Am J Bot</addtitle><description>Crataegus crus-galli L. sensu lato in southern Ontario is a complex of taxa, two of which appear to consist exclusively of both triploid and tetraploid individuals. While pollen fertility is reduced in triploids, both ploidy levels are characterized by production of eight nucleate aposporous embryo-sacs and hence remain seed-fertile; in addition, single, apparently sexual, embryo-sacs are found in the ovules of tetraploids. Agamospermy is shown experimentally to be pseudogamous. Polyploidy in C. crus-galli s.l. is accompanied by self-compatibility, in contrast to the self-incompatibility of diploid Crataegus species such as C punctata, with which comparison is made. The weediness of the component taxa of C crus-galli s.l., in general, and their tendency toward uniparental reproduction, in particular, may explain the homogeneity of their topodemes, and the way in which these topodemes may be markedly differentiated from one another even within a single taxon.</description><subject>Apomixis</subject><subject>Biological and medical sciences</subject><subject>COMPATIBILITY</subject><subject>CRATAEGUS</subject><subject>Diploidy</subject><subject>FERTILIDAD</subject><subject>FERTILITE</subject><subject>FERTILITY</subject><subject>Fruits</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Inflorescences</subject><subject>ONTARIO</subject><subject>Ovules</subject><subject>Plant cytology, morphology, systematics, chorology and evolution</subject><subject>POLIPLOIDIA</subject><subject>Pollen</subject><subject>Pollination</subject><subject>POLYPLOIDIE</subject><subject>POLYPLOIDY</subject><subject>PRODUCCION DE SEMILLAS</subject><subject>PRODUCTION DE SEMENCES</subject><subject>REPRODUCCION</subject><subject>REPRODUCTION</subject><subject>SEED PRODUCTION</subject><subject>Spermatophyta</subject><subject>Systematics (diagnosis, chromosome numbers)</subject><subject>Taxa</subject><subject>TETRAPLOIDE</subject><subject>TETRAPLOIDS</subject><subject>Tetraploidy</subject><subject>topodemes</subject><subject>TRIPLOIDE</subject><subject>TRIPLOIDS</subject><subject>Triploidy</subject><issn>0002-9122</issn><issn>1537-2197</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1986</creationdate><recordtype>article</recordtype><recordid>eNqVkEtv1DAUhS0EokPhDyCELMSiLBL8yNhxd8OIR1FRJdoidtaNYw8eZeJiJ6Lz73HIMGLLytc-3z0-Ogi9oqSkhLC325IuuSwYVbKkqhbl0BAlalneP0CLo_QQLUimC0UZO0FPUtrmq6oUe4xOOKE8v8sFitfD2HqbsO_xOsIAdjMmfPY1JDAW7Dn-Al3wbR7flPj7xbcS3_ywuInWtr7f4LRPg93h4P5ZNnFMxQa6zuNk-zTiDoYw-V_1A0QfnqJHDrpknx3OU3T74f3N-lNxefXxYr26LAxTVBaSM-ccEUxJITjl1hoQojGS1lQaVreVFBW4JVvCkgK0tiENb6sGOGNN2zh-is5m37sYfo42DXrnk7FdB70NY9KMKM5JzSnN6PmMmhhSitbpu-h3EPeaEj11rrd6KlZPxeqpc33oXN_n5ZeHf8ZmZ9vj6t-SM_D6AEAy0LkIvfHpyElFaC15xlYz9st3dv8fCfTq8zv2Z84eL2aPbRpCPHqwqqpYXWX5-Sw7CBo2Mae4va5FjkkF_w0d2bAO</recordid><startdate>198601</startdate><enddate>198601</enddate><creator>Dickinson, T.A</creator><creator>Phipps, J.B</creator><general>American Botanical Society</general><general>Botanical Society of America</general><scope>FBQ</scope><scope>IQODW</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>198601</creationdate><title>Studies in Crataegus (Rosaceae: Maloideae). XIV. The breeding system of Crataegus crus-galli sensu lato in Ontario</title><author>Dickinson, T.A ; Phipps, J.B</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c2917-732fff0629766313eeca66bc71817c28d4764af525a51aadeb0b3d4ba322bdbf3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1986</creationdate><topic>Apomixis</topic><topic>Biological and medical sciences</topic><topic>COMPATIBILITY</topic><topic>CRATAEGUS</topic><topic>Diploidy</topic><topic>FERTILIDAD</topic><topic>FERTILITE</topic><topic>FERTILITY</topic><topic>Fruits</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Inflorescences</topic><topic>ONTARIO</topic><topic>Ovules</topic><topic>Plant cytology, morphology, systematics, chorology and evolution</topic><topic>POLIPLOIDIA</topic><topic>Pollen</topic><topic>Pollination</topic><topic>POLYPLOIDIE</topic><topic>POLYPLOIDY</topic><topic>PRODUCCION DE SEMILLAS</topic><topic>PRODUCTION DE SEMENCES</topic><topic>REPRODUCCION</topic><topic>REPRODUCTION</topic><topic>SEED PRODUCTION</topic><topic>Spermatophyta</topic><topic>Systematics (diagnosis, chromosome numbers)</topic><topic>Taxa</topic><topic>TETRAPLOIDE</topic><topic>TETRAPLOIDS</topic><topic>Tetraploidy</topic><topic>topodemes</topic><topic>TRIPLOIDE</topic><topic>TRIPLOIDS</topic><topic>Triploidy</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Dickinson, T.A</creatorcontrib><creatorcontrib>Phipps, J.B</creatorcontrib><collection>AGRIS</collection><collection>Pascal-Francis</collection><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>American journal of botany</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Dickinson, T.A</au><au>Phipps, J.B</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Studies in Crataegus (Rosaceae: Maloideae). XIV. The breeding system of Crataegus crus-galli sensu lato in Ontario</atitle><jtitle>American journal of botany</jtitle><addtitle>Am J Bot</addtitle><date>1986-01</date><risdate>1986</risdate><volume>73</volume><issue>1</issue><spage>116</spage><epage>130</epage><pages>116-130</pages><issn>0002-9122</issn><eissn>1537-2197</eissn><coden>AJBOAA</coden><abstract>Crataegus crus-galli L. sensu lato in southern Ontario is a complex of taxa, two of which appear to consist exclusively of both triploid and tetraploid individuals. While pollen fertility is reduced in triploids, both ploidy levels are characterized by production of eight nucleate aposporous embryo-sacs and hence remain seed-fertile; in addition, single, apparently sexual, embryo-sacs are found in the ovules of tetraploids. Agamospermy is shown experimentally to be pseudogamous. Polyploidy in C. crus-galli s.l. is accompanied by self-compatibility, in contrast to the self-incompatibility of diploid Crataegus species such as C punctata, with which comparison is made. The weediness of the component taxa of C crus-galli s.l., in general, and their tendency toward uniparental reproduction, in particular, may explain the homogeneity of their topodemes, and the way in which these topodemes may be markedly differentiated from one another even within a single taxon.</abstract><cop>Ithaca, NY</cop><pub>American Botanical Society</pub><pmid>30139127</pmid><doi>10.1002/j.1537-2197.1986.tb09687.x</doi><tpages>15</tpages></addata></record> |
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| subjects | Apomixis Biological and medical sciences COMPATIBILITY CRATAEGUS Diploidy FERTILIDAD FERTILITE FERTILITY Fruits Fundamental and applied biological sciences. Psychology Inflorescences ONTARIO Ovules Plant cytology, morphology, systematics, chorology and evolution POLIPLOIDIA Pollen Pollination POLYPLOIDIE POLYPLOIDY PRODUCCION DE SEMILLAS PRODUCTION DE SEMENCES REPRODUCCION REPRODUCTION SEED PRODUCTION Spermatophyta Systematics (diagnosis, chromosome numbers) Taxa TETRAPLOIDE TETRAPLOIDS Tetraploidy topodemes TRIPLOIDE TRIPLOIDS Triploidy |
| title | Studies in Crataegus (Rosaceae: Maloideae). XIV. The breeding system of Crataegus crus-galli sensu lato in Ontario |
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