Studies on the Resistance of Rice Varieties to Biotypes of the Brown Planthopper, Nilaparvata lugens $ST{\AA}L$

벼멸구생태형(生態型)에 대한 수도품종(水稻品種)의 저저성(抵抵性)에 관한 연구(硏究)

  • Kim, Jeong-Wha (Department of Agricultural Biology, College of Agriculture, Chungbuk National University) ;
  • Kim, Doo-Ho (Department of Agricultural Biology, College of Agriculture, Chungbuk National University)
  • 김정화 (충북대학교 농과대학 농생물학과) ;
  • 김두호 (충북대학교 농과대학 농생물학과)
  • Published : 1986.01.30

Abstract

This study was performed to evaluate the differences in resistance of rice varieties to biotypes of the brown planthopper (BPH), capable of surving on the Milyang 30 and Milyang 63 varieties which have Bph 1 and bph 2 gene for resistance, respectively. The rice varieties tested were Milyang 30, Cheongcheong, Milyang 63 and Gaya which have been reported as having resistant genes for the BPH. The check varieties were Chucheong and Sangpoong which have no resistant gene. The degree of resistance to the BPH biotypes indicated that Milyang 30, Cheongcheong, Milyang 63 and Gaya varieties were highly resistant to the biotype 1. But their reactions against biotype 2 and 3 were variable, namely Milyang 30 and Cheongcheong were susceptible to biotype 2, and Milyang 63 was susceptible to biotype 3. In the esterase isozyme patterns of brown rice the bands of ${\beta}-1,\;{\beta}-3\;and\;{\beta}-5$ were detected in Chucheong and Sangpoong, while the bands of ${\alpha}-1,\;{\beta}-2\;and\;{\beta}-5$ were detected in the test varieties which have genes for resistance. However, the bands of ${\beta}-5$ in Milyang 63 and Gaya were stronger than those of Milyang 30 and Cheongcheong varieties. In the root of 10-days seedling, the esterase bands of ${\alpha}-2,\;{\beta}-2\;{\beta}-4\;and\;{\beta}-5$ were detected in Chucheong and Sangpoong, while the bands of ${\alpha}-1,\;{\beta}-1\;{\beta}-3\;and\;{\beta}-5$ were detected in the tested different varieties. But the bands of ${\alpha}-1\;and\;{\beta}-5$ in Milyang 63 and Gaya were stronger than those of Milyang 30 and Cheongcheong varieties.

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