松材线虫和拟松材线虫不同株系致病性的研究  

Pathogenic Comparison among14 Isolates of Bursaphelenchus xylophilus and B.mucronatus Collected from Different Regions and Countries

作　　者：胡凯基[1] 王秋丽[1] 杨宝君[1] 

机构地区：[1]中国林业科学研究院森林保护研究所

出　　处：《林业科学研究》1994年第4期381-385,共5页Forest Research

基　　金：国家科委重点科技项目;国家自然科学基金

摘　　要：１９９０～１９９３年，从国内外收集的松材线虫９个株系和拟松材线虫５个株系，用皮接法接种３～６年生的松苗，测定线虫的致病性。结果表明，松材线虫的致病力明显高于拟松材线虫，其中国内的５个株系致病力最高。拟松材线虫通常不致病或致病力极低。在同一线虫种内，株系间致病力随寄主不同而不同。在寄主死亡速度上，寄主相同并死亡率相同或相近时，采自南京、广东马尾松病树上的线虫株系接种后，寄主平均死亡时间略短于其它株系。供试的８种松树，依死亡率及感病率，马尾松最为抗病，黑松、华山松最为感病。From 1990～1993,the wirulence of 9 isolates of Bursaphelenchus xylophilusfrom Japan(S-6),Canada(STJ,STW,BxBC)and China and 5 isolates of B.mucronatus fromFrance(Bspfrance),Canada (Q1426),Norway(Norway)and China was tested.Each isolatewas inoculated(1500～2000 nematodes/per seedling)on 3～6-yr-old seedlings of 8 pinespecies through cutting the bark of the stem.As a result,the virulence of B.xylophilus iso-lates is significantly higher than that of B.mucronatus wherever they are from.For each iso-late inoculated,the graph of host mortality of 8 pine species is different even within the samenematode species.The most virulent B.xylophilusn among them,are 5 isolates from China.Isolates from Japan and Canada are moderate while isolates of B. mucronatus are less virulentor avirulent.The result of disease development is related not only to mortality but to meandeath speed(MDS).The MDS is different for different host pines inoculted with the sameisolate and is different for the same pine species inoculted with different isolates as well. Two isolates from China(both from Pinus massoniana in Nanjing and Shenzhen Cities)have asomewhat higher MDS than other isolates.P.massoniana is the most resistant pine afterinoculation while P.thunbergii and P.armandi are the most susceptible.The relationshipamong host,nematode and other factors is also discussed.

关 键 词：松材线虫 拟松材线虫 致病性 

分 类 号：S763.712.4[农业科学—森林保护学]