›› 2019, Vol. 31 ›› Issue (6): 922-929.DOI: 10.3969/j.issn.1004-1524.2019.06.09

• Plant Protection • Previous Articles     Next Articles

Distribution and resistance evaluation of 5 rice blast-resistant genes in cultivated rice varieties in Zhejiang

HE Haiyan1, 2, 3, CHAI Rongyao2, 3, QIU Haiping2, 3, MAO Xueqin2, 3, WANG Yanli2, 3, SUN Guocang2, 3, *   

  1. 1. Graduate School of Chinese Academy of Agricultural Sciences, Beijing 100080,China;
    2. Institute of Virology and Biotechnology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021,China;
    3. State Key Laboratory Breeding Base for Zhejiang Sustainable Pest and Disease Control, Hangzhou 310021,China
  • Received:2018-11-13 Online:2019-06-25 Published:2019-06-26

Abstract: In order to clarify the distribution of blast resistance genes in some rice cultivars and blast-resistant cultivars in Zhejiang Province, five functional molecular markers based on blast resistance allele sequences were used to detect Pit, Pib, Pii/Pi3/Pi5, Pia and Pi1 resistance genes in 40 main rice varieties in Zhejiang Province and 6 Chinese rice blast identification varieties. The results showed that the distribution frequencies of the five resistance genes were different, Pib gene was most widely distributed, accounting for 63.04%, followed by Pia, accounting for 58.70%, Pii/Pi3/Pi5 and Pit resistance genes were less, accounting for 21.74% and 10.87% respectively. At the same time, the resistance level of 46 rice varieties to Magnaporthe grisea was detected by 141 strains collected in the field from 2015 to 2017. The results showed that the resistance frequency of 15 varieties was more than 70%. Most of the varieties carried one or two resistance genes. The resistance level of varieties with multiple resistance genes was relatively higher.

Key words: rice, rice leaf blast, resistance gene, molecular marker

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