Poster: Biology & Disease Mgmt: Genetics of Resistance
EXPLORING THE SLOW RUSTING POTENTIAL OF WHEAT GENOTYPES AGAINST LEAF AND STRIPE RUST OF WHEAT
M. RAZA (1), M. Khan (2), M. Yaseen (3), F. Nutter (4) (1) Department of Plant Pathology and Microbiology, Iowa State University of Science and Technology, U.S.A.; (2) Department of Plant Pathology, University of Agriculture Faisalabad, Pakistan; (3) Depa
The focus of current wheat research is to achieve durable rust resistance in Pakistan. We explored slow leaf and stripe rusting potential in 37 wheat genotypes by studying different slow rusting parameters, e.g., average coefficient of infection (ACI), latent period, pustule size, pustule density, infection rate (IR), area under disease progress curve (AUDPC) and yield assessment (1000 grain weight and yield/ha). Multivariate statistical analysis techniques (Biplots and Heatmaps) were used to analyze and visualize the slow rusting parameters for identification of slow rusting genotypes. Genotypes including Lasani-2008, Chris, Crow, AS-2002, Punjab-2011, Frontana and FSD-85 demonstrated lower ACI, pustule density, IR, AUDPC, small pustule size, longer latent period, and higher 1000 grain weight and yield/ha against leaf rust. Genotypes encompassing Chris, AS-2002, Punjab-85, Yecora and Lasani-2008 revealed lower ACI, pustule density, IR, AUDPC, small pustule size, longer latent period, and higher 1000 grain weight and yield/ha against stripe rust. Combined analysis recognized genotypes including Uqab-2000, Yecora, Lasani-2008, Chris, Crow, Frontana and AS-2002 as slow leaf and stripe rusters. Hence, these slow rusters can be cultivated in fields for sustainable wheat production, and can be included in further breeding programs to produce durable rust resistant varieties.