Abstract :
Three experiments were conducted to evaluate seedling
and adult plant resistance to Drechslera teres f. teres in
barley lines with a potential use as resistance sources in
barley breeding. Disease resistance of barley seedhngs,
inoculated in the glasshouse and growth chatnber at the
one- and two-leaf stages, was significantly (P 0.05) correlated
with disease reactions on the fourth and flag leaves
of barley plants grown in growth chambers (r = 0.84-
0.94) as well as with disease levels recorded on the three
uppermost leaves in a field experiment (r — 0.64). Several
of the barley lines showed no correlation, demonstrating
either improved or decreased disease resistance at later
growth stages. Six barley lines (Alexis, Heartland,
Kinnan, CI4922, CI9776 and SWl 114-93) had the same
ranking in disease resistance to D. teres when damaged
(punctured) leaves were inoculated with a drop of spore
suspension as when undamaged leaves were spray-inoculated
with a spore suspension.
