Rice Yellow Mottle Virus is Seed-borne but not Seed Transmitted in Rice Seeds |
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| Authors: | Gnissa Konate Soungalo Sarra Oumar Traore |
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| Institution: | (1) Institut de l'Environnement et de Recherches Agricoles (INERA), BP 476, Ouagadougou 01, Burkina Faso;(2) Centre de Recherches Agricoles de Niono, Institut d'Economie Rurale, BP 07, Ségou, Mali;(3) Institut de l'Environnement et de Recherches Agricoles (INERA), BP 476, Ouagadougou 01, Burkina Faso |
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| Abstract: | Seed transmission of two pathogroups of rice yellow mottle virus from Soudano-Sahelian areas of West Africa was studied in several rice genotypes. The virus was detected by enzyme-linked immunosorbent assay and the highly susceptible rice variety BG 90-2 was used for infectivity assays. In most of the rice genotypes studied (17 out of 21), rice yellow mottle virus was detected in all seed parts including glumella, endosperm and embryo at a rate ranging from 65 to 100%. Nevertheless, no seed-borne infection was found. Infectivity of the virus decreased throughout the process of seed formation suggesting inactivation of the virus as a result of seed maturation and desiccation. It was concluded that rice yellow mottle epidemics do not develop from seed-borne infections in rice seeds. |
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| Keywords: | rice RYMV Sobemovirus transmission seed resistance |
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