Disease resistance of improved MR220 lines against Pyricularia oryzae Cavara and their preliminary agronomic performance

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2021-11-24 DOI:10.17221/55/2021-cjgpb

Siti Nor Hafiza Mohamad, Mohamad Bahagia Ab Ghaffar, A. S. Othman, S. N. Misman, Zuraida Abd Rahman, Mohd Shahril Firdaus Ab Razak, Z. A. Seman, Muhammad Fairuz Mohd Yusof, Khairulmazmi Ahmad, S. N. Yazid, H. Hashim

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Abstract

Blast disease caused by Pyricularia oryzae is one of the most destructive fungal diseases of rice in Malaysia. Utilisation of resistant varieties is the most efficient management approach towards reducing yield losses. The line IRTP21683 with the Pi9 gene has shown strong resistance against the isolate MPO988.3 of pathotype P0.0, the most prevalent P. oryzae pathotype in Malaysia. Crossing of IRTP21683 was undertaken with the recurrent parent MR220, a susceptible elite Malaysian rice variety, using a marker assisted backcrossing technique with two simple sequence repeat markers, RM19776 and RM7311, as the tag for the Pi9 gene. Twenty BC3F4 lines with the Pi9 gene were resistant when challenged with MPO 988.3. The cluster analysis based on seven agronomic parameters showed that the resistant BC3F4 lines could be divided into four groups, of which the members in group 1 and 2 have shown comparable or better performance than MR220. Five lines in group 1, B220PI9-3-48, B220PI9-3-76, B220PI9-3-77, B220PI9-3-79 and B220PI9-3-82 showed outstanding yield performance with early maturation.

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MR220改良系对稻瘟病菌的抗病性及其初步农艺性能

稻瘟病是马来西亚水稻最具破坏性的真菌病害之一。利用抗性品种是减少产量损失的最有效的管理方法。具有Pi9基因的IRTP21683对马来西亚最流行的稻瘟病型P0.0分离株MPO988.3表现出较强的抗性。利用标记辅助回交技术，以两个简单序列重复标记RM19776和RM7311作为Pi9基因的标记，将IRTP21683与马来西亚水稻易感优良品种MR220进行杂交。带有Pi9基因的20个BC3F4细胞系在MPO 988.3攻毒时表现出抗性。基于7个农艺参数的聚类分析表明，BC3F4抗性品系可分为4组，其中1、2组成员表现出与MR220相当或更好的表现。1组5个品系B220PI9-3-48、B220PI9-3-76、B220PI9-3-77、B220PI9-3-79和B220PI9-3-82早熟产量表现突出。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.