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KMID : 0379119890170020076
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Korean Journal of Mycology
1989 Volume.17 No. 2 p.76 ~ p.81
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Chromosomal Studies of Fusarium oxysporum and its formae speciales (2)
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Abstract
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The mitotic nuclear divisions in hyphae and chromosome number in 10 strains of Fusarium oxysporum were studies with the sid of Giemsa-HCl techniques. The chromosome number of fungi was ranged from 4 to 8. Of the 10 strains (F. oxysporam f. sp. lycoperici, F. oxyaporum Kangnung D2) are n=4; two (F. oxysporum Sachun3, F. oxysporum S Kohung D2) n=5; five (F. oxysporum S Kohung 3, F. oxysporum CS Hongchun D16, F. oxysporum S Bosung 5, F. oxysporum S Sunchun 4 and F. oxysporum S Haenam 4) n = 7 and one (F. oxysporum from the Australia) are n = 8. These results along with my previous papers indicate that the basic chromosome number of the F. oxysporum may be n = 4 and may have been evolutionary modification within this fugal group through diploidy and aneuploidy. As additional strains are studied, the chromosome number should help to reveal steps possible phylogenetic relationship within the group as well as more clearly defining taxonomic group and variation factors.
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