Resistance to Xanthomonas perforans race T4 causing bacterial spot in tomato breeding lines Academic Article uri icon

abstract

  • Tomato (Solanum lycopersicum) is the second most important vegetable crop in the world. Bacterial spot (BS) of tomato, caused by four species of Xanthomonas: X. euvesicatoria, X. vesicatoria, X. perforans and X. gardneri, results in severe loss in yield and quality due to defoliation and formation of lesions on fruits, respectively. Currently management practices do not offer effective control under conditions of high disease pressure. Thus, developing BS resistance is a critical priority for tomato growers in order to minimize crop losses. Sixtythree advanced tomato breeding lines, heirlooms and wild tomato lines with diverse genetic backgrounds were screened under greenhouse and field conditions for BS resistance using X. perforans race T4, which was found to be a prevalent race in North Carolina. Race T4 isolate 9 was used to inoculate the plants by spraying, and disease severity was measured using the HorsfallBarratt scale. Tomato lines 74L1W(2008), NC2CELBR, 081121Xgsms, NC22L1 (2008) and 52LB1 showed resistance to BS in the field and/or greenhouse trials. These lines were derived from S. pimpinellifolium L3707. Screening L3707 followed by development of a mapping population and mapping resistance genes might be useful for breeding resistance against BS in future breeding programmes.

published proceedings

  • Plant Pathology

altmetric score

  • 1.5

author list (cited authors)

  • Bhattarai, K., Louws, F. J., Williamson, J. D., & Panthee, D. R.

citation count

  • 13

complete list of authors

  • Bhattarai, K||Louws, FJ||Williamson, JD||Panthee, DR

publication date

  • September 2017

publisher