Screening of Rice Genotypes for Bacterial Blight of Rice Under Artificial Inoculation Method and Monitoring Field Virulence of Xanthomonas oryzae pv. oryzae

Bhukya Srinivas; V. A. Patil; C. U. Shinde; Priya John; Y. A. Garde; R. R. Waghunde

doi:10.23910/1.2023.4921a

Authors

Bhukya Srinivas Dept. of Plant Pathology, NMCA, NAU, Navsari, Gujarat (396 450), India https://orcid.org/0000-0003-1739-9292
V. A. Patil Dept. of Plant Pathology, MRRC, SWMRU, NAU, Navsari, Gujarat(396 450), India
C. U. Shinde Dept. of Entomology, NMCA, NAU, Navsari, Gujarat (396 450), India
Priya John Dept. of Plant Pathology, NMCA, NAU, Navsari, Gujarat (396 450), India
Y. A. Garde Dept. of Agricultural Statistics, NMCA, NAU, Navsari, Gujarat (396 450), India
R. R. Waghunde Dept. of Plant Pathology, College of Agriculture, NAU, Bharuch, Gujarat (392 012), India

DOI:

https://doi.org/10.23910/1.2023.4921a

Keywords:

Artificial inoculation, bacterial blight, Oryza sativa, screening, virulence, Xoo

Abstract

The present study was conducted at the main rice research centre, Navsari Agricultural University, Navsari, Gujarat, India during kharif (July–November, 2020) to study the screening of rice genotypes for bacterial blight of rice under artificial inoculation method and monitoring field virulence of Xanthomonas oryzae pv. oryzae. Thirty genotypes along with two susceptible checks against bacterial blight pathogen under artificial inoculation condition revealed that, 3 genotypes were found moderately resistant viz., NVSR-466, NVSR-396 and ISM. Whereas, 12 genotypes viz., NVSR-411, NVSR-443, NVSR-447, NVSR-453, GNR-6, IR-28, NAUR-1, GNR-2, Gurjari, GNR-4, Krishna kamod and GAR-13 were found susceptible to Xoo and two checks viz., GR-11 and TN-1 were found highly susceptible. Observing to the disease severity, by screening 29 IRBB differentials and two checks employed for research on monitoring virulence of Xoo. Out of 29 differentials, 3 entries were found resistant viz., IRBB-53, IRBB-57 and IRBB-60. Whereas, 3 entries viz., IRBB-50, IRBB-52 and IRBB-61 were moderately susceptible reaction and all the single genes possessing entries were found susceptible to Navsari isolates of Xoo. The goal of this study provided valuable insights to determine the potential management strategies for the disease in rice crops by employing methodology of two rows of 2 meters in length for each entry, the susceptible check TN-1 and GR-11 were planted after the 10^th test entry for screening of rice genotypes and monitoring the field virulence of Xoo.