SciELO - Scientific Electronic Library Online

 
vol.77 número2Effect of herbicide resistance endowing three ACCase mutations on seed germination and viability in American slough grass ( Beckmannia syzigachne Steud. Fernald)Chemical composition and antioxidant activity of leaves of mycorrhized sea-buckthorn ( Hippophae rhamnoides L.) índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

  • Em processo de indexaçãoCitado por Google
  • Não possue artigos similaresSimilares em SciELO
  • Em processo de indexaçãoSimilares em Google

Compartilhar


Chilean journal of agricultural research

versão On-line ISSN 0718-5839

Resumo

LI, Lingxu; LUO, Xiaoyong  e  WANG, Jinxin. Resistance level and target-site mechanism to fenoxaprop- p -ethyl in Beckmannia syzigachne (Steud.) Fernald populations from China. Chilean J. Agric. Res. [online]. 2017, vol.77, n.2, pp.150-154. ISSN 0718-5839.  http://dx.doi.org/10.4067/S0718-58392017000200150.

Beckmannia syzigachne (Steud.) Fernald is one of the main grass weeds severely harming wheat (Triticum aestivum L.) production in rice-wheat areas in China. Fenoxaprop-p-ethyl is the main herbicide used to selectively control grass weed in China. Beckmannia syzigachne has evolved resistance to fenoxaprop-p-ethyl due to continuous application. To investigate fenoxaprop-p-ethyl resistant level and mechanism in B. syzigachne in a portion of the rice-wheat area in China, samples from 31 field populations were collected and treated with fenoxaprop-p-ethyl. The results show that 10 of the 31 tested field populations evolved a high level of resistance to fenoxaprop-p-ethyl. A portion of the acetyl-coenzyme A carboxylase (ACCase) gene was amplified, sequenced and aligned. The known Ile-1781-Leu, Ile-1781-Val, Ile-2041-Asn, Asp-2078-Gly and Gly-2096-Ala mutations were identified in five resistant populations. None of the known resistant substitutions was identified in the other five resistant populations, which means the resistance to fenoxaprop-p-ethyl in these populations is likely endowed by non-target-site resistance mechanism.

Palavras-chave : ACCase; American slough grass; amino acid substitution; resistant level; resistant mechanism..

        · texto em Inglês     · Inglês ( pdf )