| cotton leaf curl gezira alphasatellite associated with tomato leaf curl sudan virus approaches the expected upper size limit in the evolution of alphasatellites. | begomoviruses (family geminiviridae) cause severe damage to tomato crops worldwide. among them, tomato leaf curl disease (tolcd)-associated begomoviruses are a major concern for tomato production in sudan. here, we report the detection of unexpectedly large cotton leaf curl gezira alphasatellite molecules (up to 1467 nt) associated with an isolate of a novel strain of tomato leaf curl sudan virus (tolcsdv) in tomato plants affected by tolcd. a recombinant nature is suggested for this tolcsdv iso ... | 2013 | 24140627 |
| molecular characterization of a naturally occurring intraspecific recombinant begomovirus with close relatives widespread in southern arabia. | tomato leaf curl sudan virus (tolcsdv) is a single-stranded dna begomovirus of tomato that causes downward leaf curl, yellowing, and stunting. leaf curl disease results in significant yield reduction in tomato crops in the nile basin. tolcsdv symptoms resemble those caused by tomato yellow leaf curl virus, a distinct and widespread begomovirus originating in the middle east. in this study, tomato samples exhibiting leaf curl symptoms were collected from gezira, sudan. the associated viral genome ... | 2014 | 24890736 |
| evidence for interspecific-recombination for three monopartite begomoviral genomes associated with the tomato leaf curl disease from central sudan. | two distinct viral genotypes were identified in the same tomato plant collected from gezira, sudan and are provisionally designated tomato leaf curl sudan virus (tolcsdv-gez) and tomato yellow leaf curl virus-sudan (tylcv-sd). a third genotype was identified in tomato samples collected in shambat, sudan (tolcsdv-sha). the tolcsdv-gez and tolcsdv-sha isolates were approximately 90% identical, tylcv-sd from gezira shared approximately 93% identity with tylcv-mld. recombination analyses identified ... | 2005 | 15703848 |