Magnaporthe oryzae Populations Adapted to Finger Millet and Rice Exhibit Distinctive Patterns of Genetic Diversity, Sexuality and Host Interaction
作者： J. P. Takan , J. Chipili , S. Muthumeenakshi , N. J. Talbot , E. O. Manyasa
DOI: 10.1007/S12033-011-9429-Z
关键词:
摘要: In this study, host-specific forms of the blast pathogen Magnaporthe oryzae in sub-Saharan Africa (SSA) were characterised from distinct cropping locations using a combination molecular and biological assays. Finger millet populations East revealed continuous genetic variation pattern lack clonal lineages, with wide range haplotypes. M. lacked grasshopper (grh) element (96%) appeared to those Asia. An overall near equal distribution (47–53%) mating types MAT1-1 MAT1-2, high fertility status (84–89%) dominance hermaphrodites (64%) suggest strong sexual reproductive potential. Differences aggressiveness cultivar incompatibility importance quantitative resistance. Rice West showed typical lineage-based structure. Among nine lineages identified, three comprised ~90% isolates. Skewed (29%) MAT1-2 (71%) was accompanied by low fertility. Clear differences compatibility within between R gene-mediated interactions. Distinctive patterns diversity, potential pathogenicity adaptive divergence linked crop domestication agricultural intensification.
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