Fusarium oxysporum f. sp. passiflorae (FOP) is reported for the first time in Northland, New Zealand. The identity of this host-specific pathogen was confirmed by pathogenicity testing, morphological characters, and DNA sequencing. Pathogenic strains of Fusarium oxysporum secrete unique proteins or effectors, ‘secreted in xylem’ (SIX), which are likely to contribute to host-specific virulence. Sequence analysis of the EF-1a gene, β-tubulin and the effector genes SIX6 and SIX9 confirmed that New Zealand isolates belong to FOP. This study confirmed that the three New Zealand EF-1α haplotypes of FOP had identical SIX6 and SIX9 sequences, indicating that the same homolog of each gene, SIX6a and SIX9a, is shared by both haplotypes of FOP. SIX genes are rarely detected in non-pathogenic strains of Fusarium oxysporum species complex (FOSC) and pathogenicity tests are necessary to confirm its pathogenicity status.

尖孢镰刀菌f。sp。西番莲（FOP）首次在新西兰北地报道。通过病原性测试，形态特征和DNA测序证实了该宿主特异性病原体的身份。尖孢镰刀菌的致病菌株分泌“分泌在木质部”（SIX）的独特蛋白质或效应子，这可能有助于宿主特异性毒力。EF-1a基因，β-微管蛋白和效应基因SIX6和SIX9的序列分析证实，新西兰分离株属于FOP。这项研究证实了FOP的三种新西兰EF-1α单倍型具有相同的SIX6和SIX9序列，表明FOP的两个单倍型都共享每个基因SIX6a和SIX9a的相同同源物。在非病原性镰刀菌种复合物（FOSC）中很少检测到SIX基因，并且有必要进行致病性测试以确认其致病性状态。