Evaluation of germplasm accessions for resistance to rice Brown planthopper,
Nilaparvata lugens (Stål)
Anupama Dhawande, V Jhansi Lakshmi* , PM Chirukar and GR Katti, LV Subba Rao
ICAR-Indian Institute of Rice Research (ICAR-IIRR), Rajendranagar, Hyderabad-500030, Telangana, India.
*Corresponding author (email: email@example.com)
Received: 14th Nov. 2018 Accepted: 28rd Dec. 2018
A total of 1003 germplasm accessions collected from different parts of India were mass screened for their reaction to brown planthopper, Nilaparvata lugens (Stål) by standard seed box technique using TN1 and PTB 33 as susceptible and resistant checks respectively during 2015-16 at Indian Institute of Rice Research, Hyderabad. Out of 1003 entries screened, 37 entries exhibited a damage score (DS) ranging from 0-5 and were designated as highly resistant, resistant and moderately resistant to BPH, and the remaining 966 entries were susceptible with a damage score of 5.1-9.0. Out of 37 accessions, two accessions viz., IC 75975 (DS-0.77), IC 216750 (DS-(0.80) were highly resistant, 21 accessions were resistant (DS-1.0-3.0) and 14 accessions were moderately resistant (DS- 3.1-5.0). The selected resistant entries were assessed for their feeding preference by brown planthopper by measuring feeding marks. They exhibited more number of probing (feeding) marks by BPH ranging from 5.2–31.6/seedling indicating the non-suitability of the accessions for feeding by the insect. Resistant check PTB-33 recorded 18.4 probing marks and susceptible TN1 recorded 3.1 probing marks/ seedling. The identified resistant germplasm accessions can be used in the breeding programmes to develop BPH resistant varieties.