Phytoparasitica (2006) 34, 54-62

Chuan-Qing Zhang and Ming-Guo Zhou (2006)
Recovery and characterization of asexual recombinants of Magnaporthe grisea
Phytoparasitica 34 (1), 54-62
Abstract: Eleven nitrate non-utilizing (nit) mutants were recovered from six field isolates of Magnaporthe grisea that had different degrees of sensitivity to the blasticide kitazin P (iprobenfos, IBP). All nit mutants were resistant to chlorate and there were no significant differences in hyphal growth rate, conidial production, sensitivity to IBP, and pathogenicity between nit mutants and their parent isolates. nit phenotypes and IBP-resistance were used as two independent genetic markers to study asexual recombination in M. grisea. Asexual recombinants were recovered from the heterokaryotic mycelium of three inter-strain pairings, namely, DY2-3(nit1-LR) + A7-3 (nitM-S); A7-3 (nitM-S) + F4-2 (nit1-MR); and F4-2 (nit1-MR) + DY2-4 (nitA-LR), at a frequency of 7.31%, 14.00% and 8.63%, respectively. The growth rate, conidial production and pathogenicity of asexual recombinants were similar to those of parental strains. We concluded that asexual recombination resulting from hyphal fusion might contribute to variability in M. grisea.
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Link to article at publishers website
Database assignments for author(s): Ming-Guo Zhou, Chuan-Qing Zhang

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Pyricularia oryzae