Supernumerary Chromosomes in Haplopappus validus (RYDB.) Cory
Supernumerary chromosomes (sc) in Haplopappus validus were studied with regard to their morphological and genetic effects and their mode of transmission. No morphological effects were observed with up to six sc, but fertility, as judged by percentage pollen stainability, is reduced with increasing n...
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| Veröffentlicht in: | Evolution 1968-12, Vol.22 (4), p.748-750 |
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| container_title | Evolution |
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| creator | Smith, Edwin B. |
| description | Supernumerary chromosomes (sc) in Haplopappus validus were studied with regard to their morphological and genetic effects and their mode of transmission. No morphological effects were observed with up to six sc, but fertility, as judged by percentage pollen stainability, is reduced with increasing numbers of sc. The sc tended to increase in number through the male line as a result of post-meiotic preferential distribution. Pollen with higher numbers of sc is apparently at a disadvantage in competition with pollen with few or no sc. Presence of sc in the section Isopappus of Haplopappus is correlated with the relative antiquity of taxa in the section, being most frequent in the most primitive taxon and apparently absent or rare in the two most recently evolved taxa. |
| doi_str_mv | 10.1111/j.1558-5646.1968.tb03474.x |
| format | Article |
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Cory</title><source>JSTOR Archive Collection A-Z Listing</source><source>EZB-FREE-00999 freely available EZB journals</source><source>Alma/SFX Local Collection</source><creator>Smith, Edwin B.</creator><creatorcontrib>Smith, Edwin B.</creatorcontrib><description>Supernumerary chromosomes (sc) in Haplopappus validus were studied with regard to their morphological and genetic effects and their mode of transmission. No morphological effects were observed with up to six sc, but fertility, as judged by percentage pollen stainability, is reduced with increasing numbers of sc. The sc tended to increase in number through the male line as a result of post-meiotic preferential distribution. Pollen with higher numbers of sc is apparently at a disadvantage in competition with pollen with few or no sc. 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Cory</title><title>Evolution</title><addtitle>Evolution</addtitle><description>Supernumerary chromosomes (sc) in Haplopappus validus were studied with regard to their morphological and genetic effects and their mode of transmission. No morphological effects were observed with up to six sc, but fertility, as judged by percentage pollen stainability, is reduced with increasing numbers of sc. The sc tended to increase in number through the male line as a result of post-meiotic preferential distribution. Pollen with higher numbers of sc is apparently at a disadvantage in competition with pollen with few or no sc. Presence of sc in the section Isopappus of Haplopappus is correlated with the relative antiquity of taxa in the section, being most frequent in the most primitive taxon and apparently absent or rare in the two most recently evolved taxa.</description><subject>Chromosome morphology</subject><subject>Chromosomes</subject><subject>Plants</subject><subject>Pollen</subject><subject>Sex chromosomes</subject><subject>Taxa</subject><issn>0014-3820</issn><issn>1558-5646</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1968</creationdate><recordtype>article</recordtype><recordid>eNqVkF2L1DAUhoMozuzoX1iKeLF70XqSJmkjLKh1dISBAb_Aq9Cmp2xLO-kmU53597Z2HLw1EE4g73kO5yHkBYWIjudVE1Eh0lBILiOqZBodCoh5wqPjI7K8fD0mSwDKwzhlsCBX3jcAoARVT8mCpUJOd0nuvgw9uv3QocvdKcjune2stx36oN4Hm7xvbZ_3_eCDn3lbl2O9-fzj_bvoNsisOz0jT6q89fj8XFfk24f112wTbncfP2Vvt6GJY8FDkyYihaRMWMlEUSGypKIGc4MgwajUqIohR4olT6pyXBFYLqQp4lIJU8giXpGbmds7-zCgP-iu9gbbNt-jHbymCriiVCRyjL6eo8ZZ7x1Wund1N-6mKehJn2705EhPjvSkT5_16ePYfH2eMxQdlpfWv77GwJs58Ktu8fQfaL3-vvvzHBEvZ0TjD9b9i2AxJJpxkAog_g3qP4tb</recordid><startdate>196812</startdate><enddate>196812</enddate><creator>Smith, Edwin B.</creator><general>Society for the Study of Evolution</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>196812</creationdate><title>Supernumerary Chromosomes in Haplopappus validus (RYDB.) Cory</title><author>Smith, Edwin B.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3354-c875807d72d25bfee27f1ceace060c98c9f2e4e1ed47fd11102a56cb3d95cb6b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1968</creationdate><topic>Chromosome morphology</topic><topic>Chromosomes</topic><topic>Plants</topic><topic>Pollen</topic><topic>Sex chromosomes</topic><topic>Taxa</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Smith, Edwin B.</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Evolution</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Smith, Edwin B.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Supernumerary Chromosomes in Haplopappus validus (RYDB.) Cory</atitle><jtitle>Evolution</jtitle><addtitle>Evolution</addtitle><date>1968-12</date><risdate>1968</risdate><volume>22</volume><issue>4</issue><spage>748</spage><epage>750</epage><pages>748-750</pages><issn>0014-3820</issn><eissn>1558-5646</eissn><abstract>Supernumerary chromosomes (sc) in Haplopappus validus were studied with regard to their morphological and genetic effects and their mode of transmission. No morphological effects were observed with up to six sc, but fertility, as judged by percentage pollen stainability, is reduced with increasing numbers of sc. The sc tended to increase in number through the male line as a result of post-meiotic preferential distribution. Pollen with higher numbers of sc is apparently at a disadvantage in competition with pollen with few or no sc. Presence of sc in the section Isopappus of Haplopappus is correlated with the relative antiquity of taxa in the section, being most frequent in the most primitive taxon and apparently absent or rare in the two most recently evolved taxa.</abstract><cop>United States</cop><pub>Society for the Study of Evolution</pub><pmid>28562856</pmid><doi>10.1111/j.1558-5646.1968.tb03474.x</doi><tpages>3</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0014-3820 |
| ispartof | Evolution, 1968-12, Vol.22 (4), p.748-750 |
| issn | 0014-3820 1558-5646 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_1904911576 |
| source | JSTOR Archive Collection A-Z Listing; EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection |
| subjects | Chromosome morphology Chromosomes Plants Pollen Sex chromosomes Taxa |
| title | Supernumerary Chromosomes in Haplopappus validus (RYDB.) Cory |
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