Powdery mildew resistance genes were postulated in 82 Indian and exotic wheat
genotypes using infection-type matching technique. The genotypes were subjected
to eight pathotypes of Erysiphe graminis f. sp. tritici with diverse virulence. Based
on their reaction to the pathotypes, the genotypes were categorised into 8 groups
(I to VIII). Resistance in first VI groups was govemed by genes Pm3a, Pm3c, pmS,
PmB and some unidentified gene(s) individually or in combination. In majority of
the genotypes resistance was attributed to gene PmB individually or in combination
with other gene(s). Presence of gene PmB was confirmed by pedigree relationships.
Sixteen genotypes in group VII behaved differentially to the pathotypesi however,
resistance in these genotypes could not be attributed to any known gene(s). Twenty
two genotypes in group VIII showed susceptible reaction to all the pathotypes
indicating absence of resistance gene(s).
Keywords: Powdery mildew, Triticum aestivum, Triticum durum, Infection-type matching technique.
Article DOI: NA
Print ISSN: 0019-5200
Online ISSN: 0975-6906
RAX PAUL, ASHWANI K. BASANDRAI AND P. D. TYAGI info_circle