Screening chilli (Capsicum annuum L.) genotypes for resistance to broad mite (Polyphagotarsonemus latus Banks) and analysing the geographic distribution of resistance

  • Rameash K National Bureau of Plant Genetic Resources
  • S. R. Pandravada National Bureau of Plant Genetic Resources
  • Sivaraj N National Bureau of Plant Genetic Resources
  • B Sararth Babu National Bureau of Plant Genetic Resources
  • S. K. Chakrabarty National Bureau of Plant Genetic Resources
Keywords: Chilli, GIS, Host plant resistance, mite, Polyphagotarsonemus latus

Abstract

Field screening of indigenous chilli germplasm was carried out to identify sources of resistance to the mite, Polyphagotarsonemus latus Banks. Among the 71 accessions screened, four (IC342390, IC572492, IC337281 and IC344366) were identified as resistant; 12 were found to be moderately resistant; 39 were susceptible and 16 were highly susceptible to P. latus. The GIS mapping and diversity analysis showed that the genotypes sourced from Sonipat (Haryana) and Kullu (Himachal Pradesh) were found to be having the highest range of Shannon diversity index while the genotypes collected from Nainital (Uttarakhand), Kullu and Lajaul & Spiti districts (Himachal Pradesh) and Kasaragod (Kerala) recorded the highest co-efficient of variation for their reaction to mite infestation in chilli.

Author Biographies

Rameash K, National Bureau of Plant Genetic Resources
Agricultural Entomology, Senior Scientist
S. R. Pandravada, National Bureau of Plant Genetic Resources
Plant Genetic Resources, Principal Scientist
Sivaraj N, National Bureau of Plant Genetic Resources

Plant Genetic Resources, Principal Scientist

B Sararth Babu, National Bureau of Plant Genetic Resources
Entomology, Principal Scientist
S. K. Chakrabarty, National Bureau of Plant Genetic Resources
Principal Scientist
Published
19-02-2016
Section
Research Article