RICE SCIENCE

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Phenotypic Expression of Whitebacked Planthopper Resistance in the Newly Established japonica / indica Doubled Haploid Rice Population

Kazushige SOGAWA 1, 2, SUN Zong-xiu 2, QIAN Qian 2 , ZENG Da-li 2   

  1. 1 Japan International Research Center for Agricultural Sciences, Tsukuba 305-8686, Japan; 2 State Key Laboratory of Rice Biology, China National Rice Research Institute, Hangzhou 310006, China
  • Received:2004-03-22 Revised:1900-01-01 Online:2004-06-30 Published:2004-06-30
  • Contact: Kazushige SOGAWA

Abstract:

A new doubled haploid (DH) rice population was established from a cross between WBPH-resistant japonica Chunjiang 06 (CJ-06) and susceptible indica TN1. Sucking inhibitory and ovicidal resistance of the DH rice lines were evaluated on the basis of non-preference response of WBPH immigrants and honeydew excretion by WBPH females, and appearance of watery lesions in the necrotic discoloration of leaf sheaths ovipositied by WBPH,respectively. Both the major gene resistance to WBPH, sucking inhibitory and ovicidal resistance, showed 1 (resistant): 1 (susceptible) segregation ratio in the DH population. Relative density of WBPH populations and damage scores in the DH population indicated combined functions of both the major resistance genes as well as QTLs affecting the host plant response to WBPH infestations. Thus, the newly developed CJ-06/TN1 DH population could be a useful material to analyze major genes and QTLs for WBPH resistance in japonica rice.

Key words: Sogatella furcifera, rice, doubled haploid population, varietal resistance, sucking inhibitory resistance, ovicidal resistance