2009 Fiscal Year Final Research Report
Effects of interspecific hybridization and number of vector insect species on invasion and genetic structure of entomophilic nematodes
| Project/Area Number |
18208013
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| Research Category |
Grant-in-Aid for Scientific Research (A)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
林学・森林工学
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| Research Institution | The University of Tokyo |
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Principal Investigator |
TOGASHI Katsumi The University of Tokyo, 大学院・農学生命科学研究科, 教授 (30237060)
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| Co-Investigator(Kenkyū-buntansha) |
KUBOTA Kohei 東京大学, 大学院・農学生命科学研究科, 准教授 (30272438)
LIAN Chunlan 東京大学, アジア生物資源環境研究センター, 准教授 (40376695)
SAKAUE Daisuke 東京大学, 大学院・農学生命科学研究科, 助教 (90313080)
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| Co-Investigator(Renkei-kenkyūsha) |
JIKUMARU Shota 広島県立総合技術研究所, 農業技術センター, 副主任研究員 (90416438)
MATSUNAGA Koji 独立行政法人森林総合研究所, 林木育種センター, 研究員 (40415039)
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| Project Period (FY) |
2006 – 2009
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| Keywords | マツノザイセンチュウ / ニセマツノザイセンチュウ / クワノザイセンチュウ / アカマツ / エゾマツ / 媒介昆虫 / 伝染病 / 侵入生物 |
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| Research Abstract |
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.
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