| 摘要: |
| 【目的】明确西藏主要耕作区植物线虫的种类。【方法】2006-2008年，在西藏主要耕作区林芝、山南和达孜县，采集了长势弱或出现症状的植物根际土壤样品，采用筛淘和改良贝曼漏斗法分离样品中的线虫，热杀死后用体积分数4%甲醛固定，制成玻片标本，用光学显微镜进行形态学观察、鉴定，测量形态特征值并绘图和描记。【结果】根据形态特征，从所分离的样品中鉴定出谢氏丝尾垫刃线虫（Filenchus sheri Khan & Khan,1978）、细小头垫刃线虫（Cephalenchus leptus（Siddiqi,1963）Knobloch,1972）、乌斯曼矮化线虫（Tylenchorhynchus usmanensis Khurma & Mahajan,1987）和奥氏长尾线虫（Seinura oostenbrinkiHusain & Khan,1967）4种植物线虫。其中乌斯曼矮化线虫在林芝、山南地区均有分布，其他3个种则均分布于林芝地区。【结论】鉴定的4种植物线虫的主要形态特征和测量值与文献记述基本一致，个别特征与文献记述略有差异，但只是种内不同地理种群间的差异，这些种类迄今在中国尚未有报道，故为中国新纪录种。 |
| 关键词: 新记录种 植物线虫 中国西藏 |
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| 基金项目:科技部科技基础性工作专项“线虫门侧尾腺纲垫刃目垫刃亚目（一）的编研”（2006FY120100）；农业部“全国植物有害生物疫情普查”（农发［2000］15号） |
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| Description of four new record species of plant nematodes from Tibet in China |
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| Abstract: |
| 【Objective】The study was conducted to investigate plant parasitic nematodes species in the main cultivation areas of Tibet.【Method】The samples from root and rhizosphere soil,which were collected in the main cultivation areas of Tibet Linzhi,Shannan,Dazi,were extracted by sifting and Baermann funnel during 2006-2008.The nematodes extracted were heat killed and fixed by 4% formaldehyde,then mounted on slide for morphological identification under light microscope.【Result】Based on morphological characteristics,four species plant nematodes,Filenchus sheri Khan & Khan,1978,Cephalenchus leptus(Siddiqi,1963)Knobloch,1972,Tylenchorhynchus usmanensis Khurma & Mahajan,1987,Seinura oostenbrinki Husain & Khan,1967 were identified and described.Tylenchorhynchus usmanensis Khurma & Mahajan,1987 was found in samples from Linzhi and Shannan,while the others were only found in the sample from Linzhi.【Conclusion】The main morphological characteristics and measurements of the four species were similar to literature,just a little different from different geographical populations.This is the first record of these species in China. |
| Key words: new geographic recorded species plant nematodes Tibet,China |
