|Budget Amount *help
¥41,860,000 (Direct Cost: ¥32,200,000、Indirect Cost: ¥9,660,000)
Fiscal Year 2009: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
Fiscal Year 2008: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
Fiscal Year 2007: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
Fiscal Year 2006: ¥20,020,000 (Direct Cost: ¥15,400,000、Indirect Cost: ¥4,620,000)
Interspecific hybridization between the invasive nematode pest Bursaphelenchus xylophilus and its closely-related, native nematode B. mucronatus showed that B. mucronatus genes introgressed into B. xylophilus genome and that genes responsible for the pathogenicity and ability to board insect vectors were on the nuclear genome. There were no significant difference in the intrinsic rate of natural increase or boarding ability between some hybrid-derived populations and one or two parent populations, suggesting that such hybrid-derived populations were able to persist in the field. Field survey and DNA analysis showed that the two cerambycid species of vectors did not separate Bursaphelenchus conicaudatus populations into two genetically different subpopulations.