Detection and Evaluation of Blast Resistance Genes in Backbone Indica Rice Varieties from South China
文献类型： 外文期刊
作者： Tang, Liqun 1 ; Song, Jian 1 ; Cui, Yongtao 1 ; Fan, Honghuan 1 ; Wang, Jianjun 1 ;
作者机构： 1.Zhejiang Acad Agr Sci, Inst Crops & Nucl Technol Utilizat, Hangzhou 310021, Peoples R China
关键词： disease resistance; molecular markers; indica rice; rice blast management; resistance gene pyramiding
期刊名称：PLANTS-BASEL （ 影响因子：4.0； 五年影响因子：4.4 ）
ISSN： 2223-7747
年卷期： 2024 年 13 卷 15 期
页码：
收录情况： SCI
摘要： Rice blast caused by the pathogenic fungus Magnaporthe oryzae poses a significant threat to rice cultivation. The identification of robust resistance germplasm is crucial for breeding resistant varieties. In this study, we employed functional molecular markers for 10 rice blast resistance genes, namely Pi1, Pi2, Pi5, Pi9, Pia, Pid2, Pid3, Pigm, Pikh, and Pita, to assess blast resistance across 91 indica rice backbone varieties in South China. The results showed a spectrum of resistance levels ranging from highly resistant (HR) to highly susceptible (HS), with corresponding frequencies of 0, 19, 40, 27, 5, and 0, respectively. Yearly correlations in blast resistance genes among the 91 key indica rice progenitors revealed Pid2 (60.44%), Pia (50.55%), Pita (45.05%), Pi2 (32.97%), Pikh (4.4%), Pigm (2.2%), Pi9 (2.2%), and Pi1 (1.1%). Significant variations were observed in the distribution frequencies of these 10 resistance genes among these progenitors across different provinces. Furthermore, as the number of aggregated resistance genes increased, parental resistance levels correspondingly improved, though the efficacy of different gene combinations varied significantly. This study provides the initial steps toward strategically distributing varieties of resistant indica rice genotypes across South China.
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