期刊
PEST MANAGEMENT SCIENCE
卷 77, 期 10, 页码 4298-4302出版社
JOHN WILEY & SONS LTD
DOI: 10.1002/ps.6518
关键词
EPSPS; gene amplification; copy number; glyphosate resistance; inheritance; non-Mendelian
资金
- University of Adelaide Australia (Adelaide Scholarship International)
- Grains Research and Development Corporation [UA00158]
The inheritance of glyphosate resistance in Hordeum glaucum is non-Mendelian, with F-2 progenies showing high variation in EPSPS gene copies.
BACKGROUND Hordeum glaucum Steud. is an important grass weed species in South Australia that has evolved resistance to glyphosate. This study investigated the mode of inheritance of glyphosate resistance in this species. RESULTS Hand-pollination of glyphosate susceptible and resistant populations generated two F-1 individuals, selfed to yield F-2 progenies. In dose-response experiments, the F-2 progenies showed intermediate response between the two parent populations. High variation in EPSPS gene copies was observed among F-2 individuals, with some individuals possessing more gene copies than the resistant parent population. No evidence of a Mendelian single-gene pattern of inheritance was observed. CONCLUSION Inheritance of gene amplification in H. glaucum is non-Mendelian.
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