| Resistance of Leptochloa chinensis populations to cyhalofop-butyl in rice fields of eastern China |
| Received:August 01, 2018 Download the full |
| DOI：10.16801/j.issn.1008-7303.2019.0049 |
| Key Words:rice fields Leptochloa chinensis cyhalofop-butyl acetyl CoA carboxylase (ACCase) resistance |
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| Author Name | Affiliation | E-mail | | WU Xiangwen | Shanghai Agricultural Technology Extension Service Center, Shanghai 201103, China | shzbwxw@163.com | | WANG Faguo | Qingdao Kingagroot Chemical Compound Co., Ltd., Qingdao 266071, Shandong Province, China | | | CAO Qing | Qingdao Kingagroot Chemical Compound Co., Ltd., Qingdao 266071, Shandong Province, China | |
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| Abstract: |
| Whole-plant bioassay experimernts were conducted to investigate the resistance level of Leptochloa chinensis (L.)Nees populations to cyhalofop-butyl in rice fields of eastern China. Results showed that population LC-17-276, LC-17-281, LC-17-282, LC-17-283, LC-17-289 and LC-17-290 had evolved high resistance to cyhalofop-butyl, with resistance index of 16, 21, 27, 30, 12 and 15, respectively. Molecular analyses revealed that the L. chinensis population LC-17-276 has a tryptophan (Trp)-1999-to-serine (Ser) substitution in the CT domain of the ACCase gene, whereas no mutation was detected for the other 9 resistant populations. To the best of our knowledge, this is the first report of Trp-1999-Ser mutation in L. chinensis. These results showed that L. chinensis was extensively resistant to cyhalofop-butyl in some paddy fields in eastern China. |
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