A Study on Variation Dynamic of Risistance or Susceptibility to Powdery Mildew in Wheat Cultivars

doi:10.3321/j.issn:1000-7091.1999.04.021

Abstract

Abstract: The variation dynamic of resistance or susceptibility to powdery mildew for 13 winter wheat cultivars in Henan during 1993 to 1998 was analyzed in this paper.The results showed:(1) There were no immune cultivars.The cultivars of disease development heaviest was Yumai 13,average desease index and AUDPC has reached 28.9 and 502,respectively.(2) There were 5 cultivars no changing in resistance or susceptibility to powdery mildew.These account for 38%.The resistance or susceptibility of 8 cultivars to powdery mildew have taken place variation.These account for 62%.The reasons of resistance or susceptibility variation to powdery mildey in wheat cultivars were analyzed.

Key words: Winter wheat, Cultivars, Powdery mildew, Resistance, Susceptibility, Variation dynamic

CLC Number:

S512.110.34

Wang Haiyan, Zhang Zhongshan. A Study on Variation Dynamic of Risistance or Susceptibility to Powdery Mildew in Wheat Cultivars[J]. ACTA AGRICULTURAE BOREALI-SINICA, 1999, 14(4): 111-116. doi: 10.3321/j.issn:1000-7091.1999.04.021.

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