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- Title
Appearance of Cotton leaf curl disease begomovirus avirulent strains associated with a lower disease incidence in Delhi.
- Authors
Duhan, Manisha; Gupta, Subhankar; Bhattacharyya, U. K.; Palchoudhury, S.; Biswas, K. K.
- Abstract
A survey of cotton leaf curl disease (CLCuD) in cotton fields of ICAR-IARI, New Delhi was made to study the disease incidence and determine the causal agents of CLCuD-begomovirus species or variants. The CLCuD incidence was estimated to 20.7% in the year 2018 and 26.3% in 2019 and it was observed lower than in the previous years. Five CLCuD-begomovirus isolates collected from infected fields were characterized based on sequence analysis of complete CP gene. The present isolates shared 99-100% nt identity among them, and 71-91% identity among the other CLCuD begomoviruses. Based on phylogenetic analysis, three isolates were members of Cotton leaf curl Multan virus - Rajasthan (CLCuMuV-Ra) and two were Cotton leaf curl Kokhran virus - Burewala (CLCuKoV) strains. Of five CLCuD isolates, four were detected as recombinants showing a common break point at 759-52nt (P=1.768 × 10-1). Thus, the occurrence of present lower degree of CLCuD may be due to the appearance of putative recombinant and avirulent CLCuMuV and CLCuKoV stains.
- Subjects
COTTON leaf curl; BEGOMOVIRUSES; DISEASE incidence; VIRUS phylogeny; VIRUS isolation
- Publication
Annals of Plant Protection Sciences, 2020, Vol 28, Issue 1, p67
- ISSN
0971-3573
- Publication type
Article
- DOI
10.5958/0974-0163.2020.00016.6