Evidence of functional unreduced gametes in Trifolium repens L
The current research reports the first evidence of functional 2n gametes in megaspores of Trifolium repens L. Reciprocal backcrossing of a colchicine doubled hexaploid (2n = 6x = 48) T. repens × T. nigrescens (6x H-6909-5) F^sub 1^ hybrid to T. repens produced four seeds from 1700 pollinations. The...
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| Veröffentlicht in: | Euphytica 1997-01, Vol.97 (1), p.21-24 |
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| container_title | Euphytica |
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| creator | Hussain, S.W Williams, W.M |
| description | The current research reports the first evidence of functional 2n gametes in megaspores of Trifolium repens L. Reciprocal backcrossing of a colchicine doubled hexaploid (2n = 6x = 48) T. repens × T. nigrescens (6x H-6909-5) F^sub 1^ hybrid to T. repens produced four seeds from 1700 pollinations. The backcross involving 6x H-6909-5 as the female parent and T. repens as the male resulted in only one seed which was, as expected, a pentaploid (2n = 5x = 40) presumably carrying four genomes of T. repens and one genome of T. nigrescens. On the other hand, those backcrosses which utilised T. repens as the female parent and 6x H-6909-5 as the male parent, resulted in 3 viable seeds. These were unexpectedly all heptaploid (2n = 7x = 56) with presumably six genomes of T. repens and one genome of T. nigrescens. The occurrence of heptaploids from a T. repens × 6x H-6909-5 (4x-6x) cross can only be explained by the union of n (= 3x = 24) pollen from 6x H-6909-5 with 2n (= 4x = 32) eggs from T. repens.[PUBLICATION ABSTRACT] |
| doi_str_mv | 10.1023/A:1003002805922 |
| format | Article |
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Reciprocal backcrossing of a colchicine doubled hexaploid (2n = 6x = 48) T. repens × T. nigrescens (6x H-6909-5) F^sub 1^ hybrid to T. repens produced four seeds from 1700 pollinations. The backcross involving 6x H-6909-5 as the female parent and T. repens as the male resulted in only one seed which was, as expected, a pentaploid (2n = 5x = 40) presumably carrying four genomes of T. repens and one genome of T. nigrescens. On the other hand, those backcrosses which utilised T. repens as the female parent and 6x H-6909-5 as the male parent, resulted in 3 viable seeds. These were unexpectedly all heptaploid (2n = 7x = 56) with presumably six genomes of T. repens and one genome of T. nigrescens. The occurrence of heptaploids from a T. repens × 6x H-6909-5 (4x-6x) cross can only be explained by the union of n (= 3x = 24) pollen from 6x H-6909-5 with 2n (= 4x = 32) eggs from T. repens.[PUBLICATION ABSTRACT]</description><identifier>ISSN: 0014-2336</identifier><identifier>EISSN: 1573-5060</identifier><identifier>DOI: 10.1023/A:1003002805922</identifier><identifier>CODEN: EUPHAA</identifier><language>eng</language><publisher>Dordrecht: Springer</publisher><subject>Agronomy. Soil science and plant productions ; backcrossing ; Biological and medical sciences ; Fundamental and applied biological sciences. Psychology ; Genetics and breeding of economic plants ; genome ; Grasses ; heptaploidy ; hexaploidy ; Interspecific and intergeneric hybridization, introgressions ; interspecific hybridization ; Plant breeding: fundamental aspects and methodology ; Pollen ; polyploidy ; Seeds ; spores ; Trifolium nigrescens ; Trifolium repens ; unreduced gametes</subject><ispartof>Euphytica, 1997-01, Vol.97 (1), p.21-24</ispartof><rights>1998 INIST-CNRS</rights><rights>Kluwer Academic Publishers 1997</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=2056515$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Hussain, S.W</creatorcontrib><creatorcontrib>Williams, W.M</creatorcontrib><title>Evidence of functional unreduced gametes in Trifolium repens L</title><title>Euphytica</title><description>The current research reports the first evidence of functional 2n gametes in megaspores of Trifolium repens L. Reciprocal backcrossing of a colchicine doubled hexaploid (2n = 6x = 48) T. repens × T. nigrescens (6x H-6909-5) F^sub 1^ hybrid to T. repens produced four seeds from 1700 pollinations. The backcross involving 6x H-6909-5 as the female parent and T. repens as the male resulted in only one seed which was, as expected, a pentaploid (2n = 5x = 40) presumably carrying four genomes of T. repens and one genome of T. nigrescens. On the other hand, those backcrosses which utilised T. repens as the female parent and 6x H-6909-5 as the male parent, resulted in 3 viable seeds. These were unexpectedly all heptaploid (2n = 7x = 56) with presumably six genomes of T. repens and one genome of T. nigrescens. The occurrence of heptaploids from a T. repens × 6x H-6909-5 (4x-6x) cross can only be explained by the union of n (= 3x = 24) pollen from 6x H-6909-5 with 2n (= 4x = 32) eggs from T. repens.[PUBLICATION ABSTRACT]</description><subject>Agronomy. Soil science and plant productions</subject><subject>backcrossing</subject><subject>Biological and medical sciences</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Genetics and breeding of economic plants</subject><subject>genome</subject><subject>Grasses</subject><subject>heptaploidy</subject><subject>hexaploidy</subject><subject>Interspecific and intergeneric hybridization, introgressions</subject><subject>interspecific hybridization</subject><subject>Plant breeding: fundamental aspects and methodology</subject><subject>Pollen</subject><subject>polyploidy</subject><subject>Seeds</subject><subject>spores</subject><subject>Trifolium nigrescens</subject><subject>Trifolium repens</subject><subject>unreduced gametes</subject><issn>0014-2336</issn><issn>1573-5060</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1997</creationdate><recordtype>article</recordtype><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><recordid>eNot0M9LwzAUB_AgCs7p2aNBvFZfXpqk8SCMMX9AwYPbucT0ZXR07Uxawf_ewnZ6lw_f75fH2K2ARwEonxbPAkACYAHKIp6xmVBGZgo0nLMZgMgzlFJfsquUdgBgjYIZe1n9NjV1nngfeBg7PzR951o-dpHq0VPNt25PAyXedHwdm9C3zbjnkQ7UJV5es4vg2kQ3pztnm9fVevmelZ9vH8tFmYWpc8jqEEJtUeWIJGoXrNA5Ft-avLXagLXeSgOksEDCnJxRvpBeG5nbItQFyTm7P-YeYv8zUhqqXT_GaWiqTC5Qa416Qg8n5JJ3bYiu802qDrHZu_hXISithJrY3ZEF11duGyey-UIQcnqdKZSW8h_Akl8g</recordid><startdate>19970101</startdate><enddate>19970101</enddate><creator>Hussain, S.W</creator><creator>Williams, W.M</creator><general>Springer</general><general>Springer Nature B.V</general><scope>FBQ</scope><scope>IQODW</scope><scope>3V.</scope><scope>7SN</scope><scope>7SS</scope><scope>7T7</scope><scope>7TM</scope><scope>7X2</scope><scope>7XB</scope><scope>88I</scope><scope>8FD</scope><scope>8FE</scope><scope>8FH</scope><scope>8FK</scope><scope>ABUWG</scope><scope>AFKRA</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>C1K</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>FR3</scope><scope>GNUQQ</scope><scope>HCIFZ</scope><scope>M0K</scope><scope>M2P</scope><scope>M7N</scope><scope>P64</scope><scope>PATMY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PYCSY</scope><scope>Q9U</scope><scope>RC3</scope></search><sort><creationdate>19970101</creationdate><title>Evidence of functional unreduced gametes in Trifolium repens L</title><author>Hussain, S.W ; Williams, W.M</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-f233t-dfffd925422e1daf916428b6ec9967099c9370e5282e24ea75c83c673498fd8e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1997</creationdate><topic>Agronomy. Soil science and plant productions</topic><topic>backcrossing</topic><topic>Biological and medical sciences</topic><topic>Fundamental and applied biological sciences. Psychology</topic><topic>Genetics and breeding of economic plants</topic><topic>genome</topic><topic>Grasses</topic><topic>heptaploidy</topic><topic>hexaploidy</topic><topic>Interspecific and intergeneric hybridization, introgressions</topic><topic>interspecific hybridization</topic><topic>Plant breeding: fundamental aspects and methodology</topic><topic>Pollen</topic><topic>polyploidy</topic><topic>Seeds</topic><topic>spores</topic><topic>Trifolium nigrescens</topic><topic>Trifolium repens</topic><topic>unreduced gametes</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hussain, S.W</creatorcontrib><creatorcontrib>Williams, W.M</creatorcontrib><collection>AGRIS</collection><collection>Pascal-Francis</collection><collection>ProQuest Central (Corporate)</collection><collection>Ecology Abstracts</collection><collection>Entomology Abstracts (Full archive)</collection><collection>Industrial and Applied Microbiology Abstracts (Microbiology A)</collection><collection>Nucleic Acids Abstracts</collection><collection>Agricultural Science Collection</collection><collection>ProQuest Central (purchase pre-March 2016)</collection><collection>Science Database (Alumni Edition)</collection><collection>Technology Research Database</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Natural Science Collection</collection><collection>ProQuest Central (Alumni) (purchase pre-March 2016)</collection><collection>ProQuest Central (Alumni Edition)</collection><collection>ProQuest Central UK/Ireland</collection><collection>Agricultural & Environmental Science Collection</collection><collection>ProQuest Central Essentials</collection><collection>ProQuest Central</collection><collection>Natural Science Collection</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ProQuest One Community College</collection><collection>ProQuest Central Korea</collection><collection>Engineering Research Database</collection><collection>ProQuest Central Student</collection><collection>SciTech Premium Collection</collection><collection>Agricultural Science Database</collection><collection>Science Database</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><collection>Biotechnology and BioEngineering Abstracts</collection><collection>Environmental Science Database</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>Environmental Science Collection</collection><collection>ProQuest Central Basic</collection><collection>Genetics Abstracts</collection><jtitle>Euphytica</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hussain, S.W</au><au>Williams, W.M</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Evidence of functional unreduced gametes in Trifolium repens L</atitle><jtitle>Euphytica</jtitle><date>1997-01-01</date><risdate>1997</risdate><volume>97</volume><issue>1</issue><spage>21</spage><epage>24</epage><pages>21-24</pages><issn>0014-2336</issn><eissn>1573-5060</eissn><coden>EUPHAA</coden><abstract>The current research reports the first evidence of functional 2n gametes in megaspores of Trifolium repens L. Reciprocal backcrossing of a colchicine doubled hexaploid (2n = 6x = 48) T. repens × T. nigrescens (6x H-6909-5) F^sub 1^ hybrid to T. repens produced four seeds from 1700 pollinations. The backcross involving 6x H-6909-5 as the female parent and T. repens as the male resulted in only one seed which was, as expected, a pentaploid (2n = 5x = 40) presumably carrying four genomes of T. repens and one genome of T. nigrescens. On the other hand, those backcrosses which utilised T. repens as the female parent and 6x H-6909-5 as the male parent, resulted in 3 viable seeds. These were unexpectedly all heptaploid (2n = 7x = 56) with presumably six genomes of T. repens and one genome of T. nigrescens. The occurrence of heptaploids from a T. repens × 6x H-6909-5 (4x-6x) cross can only be explained by the union of n (= 3x = 24) pollen from 6x H-6909-5 with 2n (= 4x = 32) eggs from T. repens.[PUBLICATION ABSTRACT]</abstract><cop>Dordrecht</cop><pub>Springer</pub><doi>10.1023/A:1003002805922</doi><tpages>4</tpages></addata></record> |
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| subjects | Agronomy. Soil science and plant productions backcrossing Biological and medical sciences Fundamental and applied biological sciences. Psychology Genetics and breeding of economic plants genome Grasses heptaploidy hexaploidy Interspecific and intergeneric hybridization, introgressions interspecific hybridization Plant breeding: fundamental aspects and methodology Pollen polyploidy Seeds spores Trifolium nigrescens Trifolium repens unreduced gametes |
| title | Evidence of functional unreduced gametes in Trifolium repens L |
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