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Not AvailableThree open reading frames (ORF0, ORF1 and ORF3) of Sugarcane yellow leaf virus (SCYLV) genome which play an important role in virus replication and accumulation in plants have been characterized. Transcript levels of three genes varied among infected plants but overall expression of ORF1 was higher than ORF0 and ORF3. Cultivar H73-6110 (susceptible) yielded the highest transcript levels of ORF1 whereas cultivar H78-4153 (resistant) exhibited the lowest levels. The sugarcane cultivars exhibited no significant differences between them for the ORF0 transcripts in mature leaves and seedling tissues. The ORF0, ORF1 and ORF3 of the SCYLV isolates varied in amino acid sequence similarity and it was in the ranges of 69-99%, 73-99%, and 93-100%, respectively. Possible recombination events located in the three ORFs were identified using TOPALi (v2.5), RECCO, and RDP software’s. The results showed strong presence of recombination in the aligned sequences of ORF0 and ORF1 when TOPALi and RECCO programs were used. In contrast, no recombination signals were detected in ORF3 with all the analysis tools used in this study. Similarly, the RDP program did not reveal any recombination signals in ORF0 and ORF3 with the exception of ORF1 where numerous accessions were found to be recombinantsNot Availabl