Phenotypic responses of putative resistance chili cultivars infected by PepYLCV with viruliferous whitefly transmission

Y. Sangsotkaew, N. Jeeatid, N. Siri, P. Thummabenjapone, O. Chatchawankanphanich, B. Phuangrat, S. Techawongstien
Yellow leaf curl disease caused by Begomovirus is well recognized as a major limiting factor of chili pepper productions worldwide. Breeding for virus resistance is an alternative efficient disease management strategy. Although, there has been an attempt to improve resistant cultivars for this disease, various difficulties including scarcity of resistant source and confusion of virus strains are common problems for screening virus resistance in chili cultivar. Therefore, this study aims to identify the aggressive Begomovirus strain infected chili in Thailand by using DNA analysis and to evaluate putative resistance chili cultivars caused by Pepper yellow leaf curl virus (PepYLCV) with whitefly transmission. The results showed that nucleotide sequences of CP gene were closely related to Pepper yellow leaf curl virus - Thailand isolate KON-KG5 - with the sequences identity ranging from 99%. In addition, it was found that disease reaction to PepYLCV-TH of cultivar 102 was highly resistant with coefficient of infection (CI=4.07), while cultivar 101, 103 and 104 were resistant (CI=5.43, 6.00, and 10.00, respectively). Therefore, those four potential cultivars might be used as sources of resistance for improving chili cultivars with good horticultural traits and resistance to PepYLCV in breeding programs.
Sangsotkaew, Y., Jeeatid, N., Siri, N., Thummabenjapone, P., Chatchawankanphanich, O., Phuangrat, B. and Techawongstien, S. (2021). Phenotypic responses of putative resistance chili cultivars infected by PepYLCV with viruliferous whitefly transmission. Acta Hortic. 1326, 181-188
DOI: 10.17660/ActaHortic.2021.1326.24
https://doi.org/10.17660/ActaHortic.2021.1326.24
Begomovirus, Pepper yellow leaf curl virus - Thailand, Bemisia tabaci, disease resistance, breeding
English

Acta Horticulturae