Ali Kareem Al-Taae1, Hamid Ali Hadwan2 and Saleh Ahmed Eesa Al-Jobory1
Abstract
Twenty isolates of Fusarium oxysporum f. sp. ciceris were isolated from wilted chickpea plants obtained from different
districts of north part of Iraq to assess variability in pathogenicity of the populations. Each isolate was tested on 12 differential
chickpea varieties. Isolates showed highly significant variation in wilt severity on the differential varieties. Based on the reaction
types that induced on differential varieties, isolates were grouped into four groups, First group included isolates FocS1, FocQ7,
FocQ10, FocF13, FocH17 and FocH18; the second group included isolates FocS2, FocS3, FocS4, FocQ5, FocQ8, FocQ9, FocF11,
FocF12, FocF14 and FocH19; the third group included isolates FocF15, FocH16, FocH20; where the isolate FocQ6 was placed in the
fourth group. Results showed that the percentage of genetic similarity was ranged 42% to 100% and was 42% between the first group
and other groups and 72% between the three groups the rest and thus this indicate the presence of four races of the fungus which are
0, 4, 5 and 1B/C, this represent the first record of these races in Iraq.
Key words: Chickpea wilt, Cicer arietinum, Fusarium oxysporum f. sp. ciceris, pathogenic variability.
ا.د.علي كريم محمد الطائي | Prof.Dr.Ali Kareem Mohammed Al-Taae | 10061