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Plant Pathology Journal
Year: 2006  |  Volume: 5  |  Issue: 3  |  Page No.: 368 - 372

Existence of Two Pathotypes of Rice Yellow mottle virus, Genus Sobemovirus, in Mali

A. Onasanya, Y. Sere, M. Sie, K. Akator, M.M. Coulibaly and A. Hamadoun    

Abstract: Screenhouse studies were conducted using 10 RYMV isolates from 6 different localities in Mali against 8 WARDA differential rice genotypes to investigate the possible existence and classification of different pathotypes of RYMV in Mali. The reaction of 8 rice genotypes to the 10 RYMV isolates was different in terms of SPAD and yield reductions. The interaction between isolates and rice cultivar was also significant. AMMI cluster analysis revealed the existence of two pathotypes (HPI and MPI) of RYMV isolates in Mali. Of 8 rice genotypes studied, only Bouake 189 was highly susceptible to the two pathotypes. This information could be useful in the rice breeding programs aiming at deployment of RYMV resistant genotypes to different rice ecologies and localities in Mali.

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