| Budget Amount *help |
¥3,146,000 (Direct Cost: ¥2,420,000、Indirect Cost: ¥726,000)
Fiscal Year 2011: ¥1,508,000 (Direct Cost: ¥1,160,000、Indirect Cost: ¥348,000)
Fiscal Year 2010: ¥1,638,000 (Direct Cost: ¥1,260,000、Indirect Cost: ¥378,000)
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| Research Abstract |
Persistent herbicide application to weed species across vast areas promotes the rapid evolution of herbicide resistance among them. Ryegrass (Lolium spp) is one of the most reported herbicide-resistant weeds. Because ryegrass species is major weed of wheat field of wheat-exporting countries, their seeds are introduced into Japan as contaminants in imported wheat commodity. Herbicide resistant plants were detected in surrounding area of major ports.
To assess diffusion risk of herbicide resistant gene in area without herbicide use, I analyzed (1) frequency of resistant progenies, (2) gene flow and spatial genetic structure of the species, and (3) origin of the herbicide resistant gene.
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