Evaluation on the Rice Blast Resistance of Three Space-Induced Rice Mutant Lines and Analysis of the Resistant Heredity
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    Abstract:

    The rice blast resistance (R) could be evaluated entirely by investigating the resistance spectrum at seedling stage and neck blast resistance at adult stage. In this study, three space-induced rice mutant lines, which had been screened primarily, were performed with resistance spectra with 36 blast isolates from Guangdong Province and neck blast resistance in a natural blast nursery, Lütian, Conghua. The results indicated that the mutant lines conferred broad resistance spectra and high level of resistance to neck blast, while the on-ground control was highly susceptible. Genetic analysis showed that a single major dominant R gene conditioned H4’s and H11’s resistance to isolates GD0193 and GD866, and there were two independent dominant R genes in H4 and H11 corresponding to isoaltes GD08T4 and GD08T13, respectively. The inherited pattern of resistance in D69 to isolates GD0193 was complicated, while a single dominant major R gene controlled its resistance to isolate GD08T4 and GD866.

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XIAO Wu-ming, SUN Da-yuan, ZHANG Jing-xin, WANG Hui, GUO Tao, LIU Yong-zhu, ZHU Xiao-yuan, YANG Qi-yun, CHEN Zhi-qiang. Evaluation on the Rice Blast Resistance of Three Space-Induced Rice Mutant Lines and Analysis of the Resistant Heredity[J]. Journal of South China Agricultural University,2012,33(3):273-276

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History
  • Received:May 27,2011
  • Revised:
  • Adopted:
  • Online: July 29,2012
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