Screening of Rice Germplasm Accessions for Resistance to Brown Plant Hopper (Nilaparvata lugens Stal.)

An investigation was executed with twenty-nine rice germplasm accessions to identify the source of resistance to Brown planthopper, Nilaparvata lugens (Stal.) during Rabi 2024 at RARS, Jagtial under glasshouse conditions. These rice germplasm accessions were screened following the Standard Seed box Screening Test, with one resistant check (PTB 33) and one susceptible check (TN1). Among 29 accessions, only five viz., IR 23352-7R, RP-4516-3-6, JMS 13 A × RP 4516-3-6, CMS 59A × RP 4516-3-6 and CMS 59A × KNM 7660 displayed damage score (DS) ranging from 1 to 3 are resistant (R). Eleven accessions viz., RMS 1A, IET 23993, JMS 24A × IR 23352-7R, JMS 24A × IR 10198-66-2R, JMS 24A × RP-4516-3-6, JMS 13 A × IR 23352-7R, JMS 13 A × IR 10198-66-2R, CMS 59A × IR 23352-7R, RMS 1 A × IR 10198-66-2R, RMS 1 A × RP 4516-3-6 and RMS 1 A × KNM 7660 exhibited scoring between 3.1-5.0 are moderately resistant. The remaining 13 were identified as moderately susceptible scoring between 5.1-7.0. Further studies on the resistant mechanisms such as antixenosis, antibiosis, and tolerance are required to determine the best genotypes that could be used for developing BPH-resistant / tolerant varieties/hybrids with preferable yield and quality traits.