DIVERSITY, MUTATION AND RECOMBINATION ANALYSIS OF CHILLI INFECTING POTYVIRUSES FROM SOUTHEAST ASIA AND CHINA

Abstract

The chilli ring spot virus (ChiRSV) is one of the most important virus of chilli crop in Southeast Asia and China. Chilli ring spot virus (ChiRSV) is most devastating virus not only for chilli crop but also for solanaceous crops. In severe cases, up to 100% yield losses have been observed in chilli crop. A large virus vector population spreads this disease throughout Southeast Asia and China. The diversity of this Potyvirus is proven after examination of many samples isolated from different locations in China and Vietnam, which shows the virus is successfully prevalent in that part of the world. The phylogenetic investigation of this potyvirus included 11 full size samples in total. Phylogenetic study of different samples indicates that two sequences (KT633930, KX379001) are ancestors of all sequences and others are descendants. Later on, with the passage of time, these sequences (KT633930, KX379001) evolve and different strains, variants and species arrived. Recombination analysis shows that there is no recombination in any sequence and all sequences are quite unique. We also determined replacement frequencies for Potyviruses. According to our findings, ChiRSV is very important pathogen for not only Solanaceae family but also for other crops because of its presence on different other host plants.