S-Space College of Agriculture and Life Sciences (농업생명과학대학) Dept. of Plant Science (식물생산과학부) Theses (Ph.D. / Sc.D._식물생산과학부)
Geographical Distribution and Mechanism of ALS Inhibitor Herbicide Resistant Echinochloa spp. in Korea
한국의 ALS 저해 제초제 저항성 피의 지역적 분포와 기작
- 농업생명과학대학 식물생산과학부
- Issue Date
- 서울대학교 대학원
- 학위논문 (박사)-- 서울대학교 대학원 : 농업생명과학대학 식물생산과학부 작물생명과학 전공, 2016. 2. 김도순.
- Echinochloa spp. is one of the most problematic weed in rice cultivation in Korea, and recent confirmation of herbicide resistance (HR) in Echinochloa species has made this grass weed more problematic and difficult to manage. Thus, this study was conducted to investigate the geographical distribution of ALS and ACCase inhibitor resistant E. crus-galli and E. oryzicola in Korea and to clarify the mechanism of the resistance. 121 accessions for E. crus-galli and 113 accessions for E. oryzicola were collected nationwide in Korean rice fields. To evaluate the level of their HR,penoxsulam (PNX) as the ALS inhibitor was applied at a range of doses (0, 3.75, 7.5, 15, 30, and 60 g a.i. ha-1) and cyhalofop-butyl (CHB) as the ACCase inhibitor was treated at a range of doses (0, 31.25, 62.5, 125, 250 and 500 g a.i. ha-1) to two Echinochloa species. When compared with a susceptible reference, every E. crus-galli accessions was susceptible to PNX and CHB. In E. oryzicola, however, the whole plant assay results have revealed that 9 and 7 accessions in PNX and 9 and 6 accessions in CHB as the high (>4.5 in R/S ratio) and medium (3.0