Ahn Pyung, Chung Hoo-Sup, Lee Yong-Hwan
Department of Agricultural Biology and Research Center for New Bio-Materials in Agriculture, College of Agriculture and Life Sciences, Seoul National University, Suwon 441-744, Korea.
Plant Dis. 1998 Feb;82(2):244-246. doi: 10.1094/PDIS.1998.82.2.244.
Seventy-eight isolates of Fusarium oxysporum f. sp. cucumerinum, the causal agent of cucumber wilt, were isolated from symptomatic tissues of cucumber from four provinces in Korea. These isolates were grouped into vegetative compatibility groups (VCGs) by demonstrating heterokaryosis by complementation tests using nitrate nonutilizing (nit) mutants. All isolates were grouped into six VCGs-1-A, 1-B, 1-C, 1-D, 1-E, and 1-F. No self-incompatibility was observed in any of the isolates tested. VCG 1-A was the most common group within growing regions in Korea and proved to be the most virulent of the VCGs identified. These data indicate that the level of virulence in F. oxysporum f. sp. cucumerinum is related to VCG.
从韩国四个省份有症状的黄瓜组织中分离出78株尖孢镰刀菌黄瓜专化型（Fusarium oxysporum f. sp. cucumerinum），该菌是黄瓜枯萎病的病原菌。通过利用硝酸盐不利用（nit）突变体进行互补试验来证明异核现象，从而将这些分离株归为不同的营养体亲和群（VCGs）。所有分离株被分为六个VCG——1 - A、1 - B、1 - C、1 - D、1 - E和1 - F。在所测试的任何分离株中均未观察到自交不亲和现象。VCG 1 - A是韩国种植区域内最常见的组，并且被证明是已鉴定的VCG中致病性最强的。这些数据表明尖孢镰刀菌黄瓜专化型的致病力水平与VCG有关。
