| Budget Amount *help |
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2013: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2012: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2011: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2010: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
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| Outline of Final Research Achievements |
Pine wilt is the disease caused by the pinewood nematode, which is vectored by the insect, Monochamus alternatus. When different numbers of nematodes of a virulent isolate were inoculated on open-pollinated seedlings of resistant pine trees, logistic regression on the seedling mortality showed that inoculating a given number of nematodes could evaluate the resistance level of mother trees. Hybrids of pathogenic and non-pathogenic nematode species showed that nuclear genes were related to boarding of nematodes on beetle bodies. Two nematode populations that shared genetic background but had different virulent expressions indicated a positive correlation between the virulence and transmission. Taiwanese vector showed that the probability of inducing diapause increased as the environmental conditions were getting worse. Simulation model indicated that spatial distribution pattern of different resistant pine trees affected the stand resistance against the disease epidemic.
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