Barley Yellow Dwarf occurrence and resistance stability in wheat varieties of Pakistan
Journal Title: International Journal of Farming and Allied Sciences - Year 2015, Vol 4, Issue 3
Abstract
Barley Yellow Dwarf Virus (BYDV) occurrence and resistance stability were studied in a set of 17 varieties along with a susceptible control (Fakhr-e- Sarhad) over four years (2005-08) at Peshawar, Pakistan. Consistent and uniform BYDV symptoms were observed over study years. Enzyme Linked Immunosorbent Assay (ELISA) of 2008 experiment indicated the presence of BYDV-PAV. Phenotypic assessments with regard to incidence (infected tillers/plot) and percent BYDV severity varied among varieties. Maximum incidence (120) and severity (80%) was recorded during 2006 cropping cycle. BYDV incidence and severity was positively correlated (r = 0.935) over four years. Varieties and years remained significantly different while variety-year interaction was non-significant (P<0.05). Cvs.Punjab-96, Suleman- 96, Bakhtawar-93, Faisalabad-83 and Bahawalpur-95 displayed stability in severity levels and also expressed a phenotypic marker of Leaf Tip Necrosis (LTN) more frequently over four year experimentations which is linked with BYDV tolerance gene (Bdv1). Comparatively stable and tolerant varieties identified through level of BYDV infection could be improved further by incorporating Bdv2 and Bdv3 genes to manage this serious problem in Khyber Pakhtunkhwa province of Pakistan.
Authors and Affiliations
Muhammad Ibrahim, Syed Jawad Ahmad Shah
Keywords
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