A new resistance gene to PepYMV (Pepper yellow mosaic virus) in Capsicum annuum L.

Abstract

The potyvirus Pepper yellow mosaic virus (PepYMV) is the main virus affecting Brazilian pepper (Capsicum annuum) crops and has become a very important factor affecting pepper production in Brazil (Lucinda, da Rocha, Inoue-Nagata, & Nagata, 2012;Moulin et al., 2014). The first reports of the occurrence of this pathogen in Brazil occurred in 1980 in pepper production fields in the states of São Paulo and Minas Gerais, referring to the potyvirus strain originally classified as PVY M by Nagai (1983). However, in 2001, it was recognized as a new potyvirus species, named Pepper yellow mosaic virus (PepYMV) (Inoue-Nagata et al., 2002).The main method to control PepYMV is through genetic resistance (Bento et al., 2013). Several sources of resistance to this virus have been found in Capsicum spp. and this genetic variability has been allowing to effectively control viral diseases belonging to the potyvirus complex (Nogueira et al., 2012). Despite the wide variability of PepYMV-resistant pepper hybrids commercially available, there are reports of resistance suppression by new strains of PepYMV (Lucinda et al., 2012).The main resistance sources to potyviruses carry one of the genes from pvr series, denominated as pvr1, pvr2, pvr3, Pvr4, pvr5,

Distribution and identification of main viruses infecting pepper in Qinghai

“…More than 70 plant viruses have been documented to infect peppers in various parts of the world since Doolittle initially identified the Cucumber Mosaic Virus (CMV) on peppers in 1923 (6)(7)(8)(9). In most nations, the three main viral infections that affect peppers were Tobacco mosaic virus (TMV), Potato virus Y (PVY), and CMV (11)(12)(13)(14). 35 viruses from 14 different genera, including Potyvirus, Tobamovirus, Polerovirus, Endornavirus, and other genera, were found in peppers in China (15).…”