FREQUENCY AND EFFECTIVENESS OF Lr13 IN CONFERRING WHEAT LEAF RUST RESISTANCE IN INDIA

• Published in: Current science (Bangalore) Vol. 56; no. 9; pp. 417 - 419
• Main Authors: GUPTA, A. K., SAINI, R. G.
• Format: Journal Article
• Language: English
• Published: Bangalore CURRENT SCIENCE ASSOCIATION 05-05-1987; Current Science Association; Indian Academy of Sciences
• Subjects: Agronomy. Soil science and plant productions; Biological and medical sciences; disease resistance; Fundamental and applied biological sciences. Psychology; Generalities; genes; Genetics and breeding of economic plants; Hybridity; leaf rust; Mature plants; Necrosis; Pest resistance; plant breeding; Puccinia graminis; SHORT COMMUNICATIONS; Triticum aestivum; Varietal selection. Specialized plant breeding, plant breeding aims; Wheat; Monocotyledones; Mycosis; Tropical zone; Basidiomycetes; Puccinia triticina; Identification; Phytopathogen; Cereal crop; India; Fungi; Infection; Resistance; Gene; Asia; Gramineae; Angiospermae; Spermatophyta; Triticum aestivum; Thallophyta; Cultivar
• ISSN: 0011-3891

Many leaf rust resistant wheats in Australia, Canada and Mexico are reported to carry Lr13 , the gene which confers adult plant resistance to many leaf rust races. In India, some Lr13 -bearing wheats have been resistant to leaf rust since the last 15 years. However, some wheats like WL711 and Inia-66 are highly susceptible while Manitou, HD2009, Swati, VL421 and HD2329 have shown moderate to good resistance though all of these carry Lr13 . A dominant complimentary necrosis gene Ne2 and Lr13 are tightly linked. Consequently, crossing Ne2-Lr13 carrying wheats to Ne1 carrier wheats like Spica results in progressive hybrid necrosis, which can be used as a test for Lr13 . Using this technique, the authors report here the presence of Lr13 in 66 out of the 74 tested Indian and exotic wheats and its usefulness in conferring resistance to a highly virulent leaf rust race 77A.