Relative competitiveness of glyphosate-resistant and glyphosate-susceptible populations of hairy fleabane, Conyza bonariensis
Hairy fleabane is a weed found increasingly in agronomic crops and rural areas. Although glyphosate resistance is now widespread in this species, the ecological fitness of glyphosate-resistant (GR) and glyphosate-susceptible (GS) populations has not been compared. When seeds of both biotypes were su...
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| Veröffentlicht in: | Journal of pest science 2013-06, Vol.86 (2), p.345-351 |
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| creator | Travlos, Ilias S Chachalis, Demosthenis |
| description | Hairy fleabane is a weed found increasingly in agronomic crops and rural areas. Although glyphosate resistance is now widespread in this species, the ecological fitness of glyphosate-resistant (GR) and glyphosate-susceptible (GS) populations has not been compared. When seeds of both biotypes were subjected to different alternating temperature, germination occurring and seedling vigor did not differ between the biotypes with maximum germination at 10/20 and 15/25 °C. Under noncompetitive conditions, growth and seed production of the GR and GS biotypes were similar. The competitive ability of the two biotypes, as determined by a replacement series experiment, was also similar. Initially, the relative crowding coefficient (RCC) between the biotypes was close to one. However, the RCC values for each characteristic increased with time indicating that the GR had a small competitive advantage as plants matured. Overall, there was no apparent fitness penalty associated to glyphosate resistance. Therefore, the GR populations are likely to persist unless effective management strategies are adopted. |
| doi_str_mv | 10.1007/s10340-012-0446-x |
| format | Article |
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Although glyphosate resistance is now widespread in this species, the ecological fitness of glyphosate-resistant (GR) and glyphosate-susceptible (GS) populations has not been compared. When seeds of both biotypes were subjected to different alternating temperature, germination occurring and seedling vigor did not differ between the biotypes with maximum germination at 10/20 and 15/25 °C. Under noncompetitive conditions, growth and seed production of the GR and GS biotypes were similar. The competitive ability of the two biotypes, as determined by a replacement series experiment, was also similar. Initially, the relative crowding coefficient (RCC) between the biotypes was close to one. However, the RCC values for each characteristic increased with time indicating that the GR had a small competitive advantage as plants matured. Overall, there was no apparent fitness penalty associated to glyphosate resistance. 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Although glyphosate resistance is now widespread in this species, the ecological fitness of glyphosate-resistant (GR) and glyphosate-susceptible (GS) populations has not been compared. When seeds of both biotypes were subjected to different alternating temperature, germination occurring and seedling vigor did not differ between the biotypes with maximum germination at 10/20 and 15/25 °C. Under noncompetitive conditions, growth and seed production of the GR and GS biotypes were similar. The competitive ability of the two biotypes, as determined by a replacement series experiment, was also similar. Initially, the relative crowding coefficient (RCC) between the biotypes was close to one. However, the RCC values for each characteristic increased with time indicating that the GR had a small competitive advantage as plants matured. Overall, there was no apparent fitness penalty associated to glyphosate resistance. Therefore, the GR populations are likely to persist unless effective management strategies are adopted.</description><subject>Agriculture</subject><subject>Agronomic crops</subject><subject>Agronomy</subject><subject>Biomedical and Life Sciences</subject><subject>Biotypes</subject><subject>Competitiveness</subject><subject>Conyza bonariensis</subject><subject>crops</subject><subject>Ecology</subject><subject>Entomology</subject><subject>Fitness</subject><subject>Forestry</subject><subject>Germination</subject><subject>Glyphosate</subject><subject>Life Sciences</subject><subject>Original Paper</subject><subject>Plant Pathology</subject><subject>Plant Sciences</subject><subject>Populations</subject><subject>Rural areas</subject><subject>Seedlings</subject><subject>Seeds</subject><subject>temperature</subject><subject>Vigor</subject><subject>weeds</subject><issn>1612-4758</issn><issn>1612-4766</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2013</creationdate><recordtype>article</recordtype><sourceid>AFKRA</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNp9kU-LFDEQxRtRcF39AJ5s8OLB1sqf6U6OMqi7sCCoew7VPZXZLD1Jm-qWHcHvbsYWFQ-eUiG_9-qRV1VPBbwSAN1rFqA0NCBkA1q3zd296ky05aa7tr3_e96Yh9Uj5lsAaUGZs-r7RxpxDl-pHtJhojmc5kjMdfL1fjxON4lxpiYTB54xzjXG3d8PvPBA0xz6keopTcvJLcWf8hsM-Vj7kbDHSC_rbYrHb1j3KWIOFIvh4-qBx5Hpya_zvLp-9_bz9qK5-vD-cvvmqhlUp-Zm6LS0BL1BJFDYeik3oHvy5DdgsB-U99DTzqCyO2uHjszGKiOkJNtR69V59WL1nXL6shDP7hBK7HEsudLCTmjZlV9sjS3o83_Q27TkWNK5stVKacCoQomVGnJizuTdlMMB89EJcKdC3FqIK4W4UyHurmjkquHCxj3lP87_Ez1bRR6Tw30O7K4_SRAaALRRAOoHWqybMg</recordid><startdate>20130601</startdate><enddate>20130601</enddate><creator>Travlos, Ilias S</creator><creator>Chachalis, Demosthenis</creator><general>Springer-Verlag</general><general>Springer Nature B.V</general><scope>FBQ</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>3V.</scope><scope>7SS</scope><scope>7X2</scope><scope>8FE</scope><scope>8FH</scope><scope>8FK</scope><scope>AFKRA</scope><scope>ATCPS</scope><scope>BENPR</scope><scope>BHPHI</scope><scope>CCPQU</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>M0K</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope></search><sort><creationdate>20130601</creationdate><title>Relative competitiveness of glyphosate-resistant and glyphosate-susceptible populations of hairy fleabane, Conyza bonariensis</title><author>Travlos, Ilias S ; 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Although glyphosate resistance is now widespread in this species, the ecological fitness of glyphosate-resistant (GR) and glyphosate-susceptible (GS) populations has not been compared. When seeds of both biotypes were subjected to different alternating temperature, germination occurring and seedling vigor did not differ between the biotypes with maximum germination at 10/20 and 15/25 °C. Under noncompetitive conditions, growth and seed production of the GR and GS biotypes were similar. The competitive ability of the two biotypes, as determined by a replacement series experiment, was also similar. Initially, the relative crowding coefficient (RCC) between the biotypes was close to one. However, the RCC values for each characteristic increased with time indicating that the GR had a small competitive advantage as plants matured. Overall, there was no apparent fitness penalty associated to glyphosate resistance. 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| subjects | Agriculture Agronomic crops Agronomy Biomedical and Life Sciences Biotypes Competitiveness Conyza bonariensis crops Ecology Entomology Fitness Forestry Germination Glyphosate Life Sciences Original Paper Plant Pathology Plant Sciences Populations Rural areas Seedlings Seeds temperature Vigor weeds |
| title | Relative competitiveness of glyphosate-resistant and glyphosate-susceptible populations of hairy fleabane, Conyza bonariensis |
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