Variability in wheat yield under yellow rust pressure in Pakistan

Authors : Sajid ALI, Syed Jawad Ahmed SHAH, Hidayatur RAHMAN, Muhammad Shahab SAQIB, Muhammad IBRAHIM, Muhammad SAJJAD

Pages : 537-546

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Publication Date : 2009-12-01

Article Type : Research Paper

Abstract :Wheat yield of 37 wheat varieties along with a susceptible check, Morocco, was studied under yellow rust pressure across 3 locations of North West Frontier Province insert ignore into journalissuearticles values(NWFP);, Pakistan during 2007. Considerable high disease pressure, as revealed by yellow rust severity, was observed at all locations with the maximum insert ignore into journalissuearticles values(100%); at Cereal Crop Research Institute insert ignore into journalissuearticles values(CCRI);, Nowshera. Disease severity ranged from 0% to 70% for the tested varieties while reached 100% for Morocco with S type of host response. We report the presence of sufficient variability across locations for both yield potential and yellow rust severity. Locations with maximum disease pressure had lower mean grain yield and vice versa. NIFA followed by AUP had higher mean grain yield insert ignore into journalissuearticles values(5533 kg ha-1 and 4292 kg ha-1, respectively); with lower maximum disease severity values insert ignore into journalissuearticles values(70% and 80%, respectively);. CCRI had higher disease pressure insert ignore into journalissuearticles values(100% severity for Morocco); with lower mean grain yield insert ignore into journalissuearticles values(3676 kg ha-1);. Bahawalpur-95, Suleman-96, Kohsar-93, Fakhre-Sarhad, Tatara, and Frontana had relatively stable severity across locations in a range of 0% to 10%. Based on overall traits, Kohsar-93, Bakhtawar-92, Saleem-2000, Fakhre-Sarhad, Tatara, and Karwan had better yield and lower yellow rust severity and is recommended for cultivation and further breeding exploitation.
Keywords : Key words Puccinia striiformis, wheat varieties, multi locations, yield variability