Components of slow rusting resistance in pearl millet genotypes Hanamanth*, Patil P.V.** Department of Plant Pathology, College of Agriculture, Bijapur, University of Agricultural Sciences, Dharwad-580 005, Karnataka, India *E-mail: hanamanthagri@gmail.com
**patilpv@uasd.in
Online published on 30 November, 2019. Abstract Five components of slow rusting resistance viz., latent period, uredial density, uredial size, apparent infection rate(r) and area under disease progress curve (AUDPC) were studied in nine pearl millet genotypes for assessing the nature of slow rusting or partial resistance. Pearl millet genotypes, J 2496 (2786.70), J 2510 (3240.30), J 2517 (3175.55) and 70 SB 13 (3175.55) recorded lower values for AUDPC and increased latent period (11-12days) and decreased uredial density (5.25/cm2 to 6.16/cm2). Not much difference was observed between genotypes with respect to apparent infection rate(r). Uredial size was higher in the genotypes where uredial density per unit area was low and vice-versa. AUDPC, latent period and uredial density per unit area appears to be the significant components in selecting the slow rusting pearl millet genotypes. Based on these components, the genotypes, J 2496, J 2510, J 2517 and 70 SB 13 are categorized as slow rusters and ADMR 10, ADMR 16, ADMR 17, ADMR 27 and ADMR 49 as fast rusters. Top Keywords Slow rusting resistance, pearl millet genotypes, latent period, uredial density. Top |