Identification of Peanut Interspecific Pre-breeding Lines resistance to Peanut Bud Necrosis Disease (PBND): Field Screening, Morphological and Biochemical Parameters
2018
Peanut bud necrosis disease is one of the major viral diseases in peanut. Interspecific
peanut pre-breedinglines along with susceptible checks (KRG-1 and TMV2) were tested
under field conditions at hot spot location over two seasons. Out of 34 lines, 16 lines were
found resistant, while 16 were moderately resistant. Significant negative association was
observed between PBND incidence and phenol content, number of trichomes on leaf,
petioles and stem. While significant positive association was observed between PBND
incidence and total soluble sugar, free amino acid and leaf thickness. Higher phenol
content, number of trichomes on leaf, stem and petioles and dark green leaf colour might
have contributed a major role in imparting resistance to PBND in these peanut lines. Prebreeding
lines NRCGCS Nos. 79, 86, 159 and 301,belong to virginia habit group, were
found with less disease score, higher amount of phenol, more number of trichomes on
leaf, stem and petioles and dark green leaf color compared to susceptible checks. These
interspecific pre-breeding lines would be fresh sources for resistance to PBND for peanut
breeding programme.
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