进境木质包装中检出线虫新种——新加坡伞滑刃线虫

Bursaphelenchus singaporensis sp.n.(Nematoda:Parasitaphelenchidae) in packaging wood from Singapore—a new species of the B. xylophlus group

从新加坡进境阔叶木质包装中分离到伞滑刃属松材线虫组新种——新加坡伞滑刃线虫。该线虫雌虫和雄虫体长分别为850(690～961)μm和792(553～950)μm,身体较粗壮,口针15～16μm,侧区有4条侧线,雌虫后阴子宫囊较长(平均102μm),尾部圆锥形(c=20),略向腹面弯曲,末端钝圆,或有极短的尾尖突(1～2μm),雄虫交合刺长(41～48μm),喙突显著,远端有盘状突。该线虫与松材线虫组的B.conicaudatus、B.luxuriosae、B.fraudulentus、B.kolymensis、B.baujardi、B.xylophilus、B.mucronatus及B.abruptus形态上近似,但可从较大的交合刺及雌虫尾部形态来区分。另外用ITS—RFLP方法也可将该线虫区分出来。

Bursaphelenchus slngaporertsls sp. n. isolated from packaging wood of deciduous trees, imported from Singapore is described and illustrated.The new species is characterized by a body length of 792（553 ～ 950）tan and 850（690 ～ 961） tan of males and females, respectively, robust body（ a = 34 and 31, resp. ）, 15-16μm-long stylet, lateral field with four lines, long postuterine branch （ averaging 102μm） and a. strongly conoid female tail （ c = 20） with a freely rounded, only slightly ventrally-bent terminus,male with very strong spicules（41-48μm long） ,distinct restnnn and small cucullus, and a dorso-ventral visible terminal bursa. Bursaphelenchus singaporensis sp. n. is closely related to other species of the B. xylophilus group（ B . xylophilus , B . mucronatus, B . kolymemis . B . fraudulentus , B . conicaudatus , B . baujardi and B . luxuriosae） and similar to B. abrupt us. The morphological differentiation is mainly based on the shape of the female tail. However, B. singaporensis sp. n. differs from all other species of the B. xylophilus group by larger spicules. The new species can be differentiated from B . abruptus , B . xylophilus , B . munronatus B . fraudulentus , B . conicaudatus and B . luxuriosae by means of ITS-RFLP patterns.