Temperature and resistance gene interactions in the expression of resistance to Blumeria Graminis f. sp. Tritici |
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| Authors: | Yong-fu Ge W Johnson John J Roberts S Rajaram |
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| Institution: | (1) Department of Crop & Soil Sciences, The University of Georgia, Georgia Station, Griffin, GA, 30223, U.S.A;(2) USDA-ARS, Georgia Station, Griffin, GA, 30223, U.S.A;(3) Wheat Program, CIMMYT, Lisboa 27, Apartado Postal 6-641, 06600 Mexico D.F., Mexico |
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| Abstract: | The influence of temperature on the resistance to powdery mildew, caused by Blumeria graminis (DC.) E.O. Speer f. sp. tritici
Em. Marchal, was evaluated on six wheat cultivars/lines, Axminster/8* Chancellor (Cc) (Pm1), Chul/8*Cc (Pm3b), Yuma/8*Cc (Pm4a), VPM1 (Pm4b), Kavkaz (Pm8), and Chancellor, at two temperatures of 25EC and 15EC with two isolates of powdery mildew.
Resistance, based on the components of latency period, infection type, colony number per unit leaf area, per cent infected
leaf area, and AUDPC, was much less effective at 15EC than at 25EC for VPM1 and Yuma/8*Cc, but no resistance shift was observed for Kavkaz and Axminster/8*Cc, indicating the difference of temperature-sensitivity among Pm genes or among the interactions of individual host genes
with corresponding powdery mildew pathogen genes.
This revised version was published online in July 2006 with corrections to the Cover Date. |
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| Keywords: | temperature – resistance gene interactions powdery mildew Blumeria graminis tritici Triticum aestivum L |
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