Evaluation of Bread Wheat (Triticum aestivum L.) Genotypes for Yellow Rust Resistance in Relation to Meteorological Parameters

Authors : Pooja POOJA, Satyavir Singh DHANDA, Virender Singh PAHIL, Rishi Kumar BEHL

Pages : 53-60

View : 20 | Download : 10

Publication Date : 2022-01-30

Article Type : Research Paper

Abstract :Three bread wheat varieties insert ignore into journalissuearticles values(Triticum aestivum L.);, i.e., HD 2967, WH 711 and PBW 343, were grown in randomised block design with four replications under field conditions over two years in winter season at wheat and Barley Research farm, at CCS Haryana Agricultural University Hisar to evaluate the stripe rust severity in relation to meteorological factors like minimum and maximum temperature insert ignore into journalissuearticles values(°C); and relative humidity insert ignore into journalissuearticles values(%);, rainfall insert ignore into journalissuearticles values(mm);, soil temperature insert ignore into journalissuearticles values(°C);, canopy temperature insert ignore into journalissuearticles values(°C);, cloud cover insert ignore into journalissuearticles values(Okta);, wind speed insert ignore into journalissuearticles values(km/h);, sunshine hours insert ignore into journalissuearticles values(h/day); and morning and evening vapour pressure insert ignore into journalissuearticles values(mm Hg);. Observations were recorded on five randomly selected plants in each replication on stripe rust severity as percent leaf area covered using Modified Cobb’s scale. Results revealed that low temperature insert ignore into journalissuearticles values(10-12°C); and high relative humidity insert ignore into journalissuearticles values(90%); along with intermittent rainfall were found conducive for the onset of stripe rust. Low temperature and moderate humidity favored the disease initiation and development. At the initiation of disease, the severity was more in PBW 343 insert ignore into journalissuearticles values(0.68%); followed by WH711 insert ignore into journalissuearticles values(0.59%); during first SMW whereas HD 2967, exhibited disease initiation during 2nd SMW with 2.19% severity. Disease progression was also different in different wheat varieties. Disease gradually advanced with the crop age, and increased sharply from 15.00 to 38.00% in HD 2967, 27.50 to 46.00% in WH711 and 35.00 to 43.6% in PBW 343 during 6-8th Standard Meteorological Week, when the crop was at stem elongation to jointing stage, i.e., GS 36-47 insert ignore into journalissuearticles values(64-78 DAS);. Yield loss due to disease severity was estimated to be 356 kg/ha, 690 kg/ha and 400 kg/ha in wheat varieties HD2967, WH711 PBW343, respectively. Step-wise multiple regression showed high R2 value of 0.885, 0.919 and 0.952 for the predictive model of stripe rust in HD 2967, WH 711 and PBW 343, respectively
Keywords : Stripe rust, bread wheat, Triticum aestivum L, temperature, rainfall, relative humidity