Evaluation of Rice Germplasm for Resistance to the Small Brown Planthopper (Laodelphax striatellus) and Analysis of Resistance Mechanism

RICE SCIENCE ›› 2008, Vol. 15 ›› Issue (1): 36-42 .

Evaluation of Rice Germplasm for Resistance to the Small Brown Planthopper (Laodelphax striatellus) and Analysis of Resistance Mechanism

DUAN Can-xing ¹; ZHANG Shi-xian ²; LEI Cai-lin ¹; CHENG Zhi-jun ¹; CHEN Qing¹; ZHAI Hu-qu ³; WAN Jian-min ¹

¹ Institute of Crop Sciences, Chinese Academy of Agricultural Sciences / The National Key Facility for Crop Gene Resources and Genetic Improvement, Beijing 100081, China; ²Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100094, China; ³ Chinese Academy of Agricultural Sciences, Beijing 100081, China

收稿日期:2007-08-02 出版日期:2008-03-28 发布日期:2008-03-28
通讯作者: WAN Jian-min
基金资助:
the National 973 Program (Grant No. 2004CB117204) and the National Key Research Program of the 10th Five-Year-Plan of China (Grant No. 2004BA525B02-04).

摘要/Abstract

摘要： One hundred and thirty-eight rice accessions were screened for resistance to the small brown planthopper (SBPH) (Laodelphax striatellus Fallén) by the modified seedbox screening test. Twenty-five rice accessions with different levels of resistance to SBPH were detected, accounting for 18.1% of the total accessions, which included 2 highly resistant, 9 resistant and 14 moderately resistant varieties. Compared with indica rice, japonica rice was more susceptible to SBPH. Antixenosis test, antibiosis test and correlation analysis were performed to elucidate the resistance mechanism. The resistant check Rathu Heenati (RHT), highly resistant varieties Mudgo and Kasalath, and resistant variety IR36 expressed strong antixenosis and antibiosis against SBPH, indicating the close relationship between resistance level and these two resistance mechanisms in the four rice varieties. Antibiosis was the dominant resistance pattern in the resistant varieties Daorenqiao and Yangmaogu due to their high antibiosis but low antixenosis. Dular, ASD7 and Milyang 23 had relatively strong antixenosis and antibiosis, indicating the two resistance mechanisms were significant in these three varieties. The resistant DV85 expressed relatively high level of antixenosis but low antibiosis, whereas Zhaiyeqing 8 and Guiyigu conferred only moderate antibiosis and antixenosis to SBPH, suggesting tolerance in these three varieties. Antibiosis and antixenosis governed the resistance to SBPH in the moderately resistant accession 9311. Antixenosis was the main resistance type in V20A. Tolerance was considered to be an important resistance mechanism in Minghui 63 and Yangjing 9538 due to their poor antibiosis and antixenosis resistance. The above accessions with strong antibiosis or antixenosis were the ideal materials for the resistance breeding.

关键词: rice germplasm, the small brown planthopper, evaluation for resistance, resistance mechanism, antixenosis, antibiosis

DUAN Can-xing, ZHANG Shi-xian, LEI Cai-lin, CHENG Zhi-jun, CHEN Qing, ZHAI Hu-qu, WAN Jian-min . Evaluation of Rice Germplasm for Resistance to the Small Brown Planthopper (Laodelphax striatellus) and Analysis of Resistance Mechanism[J]. RICE SCIENCE, 2008, 15(1): 36-42 .

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