Effects of reduced plant height on breeding requirements and ...

with several critical agronomic parameters measured through_
out this study indicate the value <strong>of</strong> this trait in selecting
barley genotypes in breeding programs. perhaps thÍs is one
easily neasureabLe traÍt which has not been fully utitized
Ín our breeding programs here in western canada in particular.
Days to maturitv. This trait was also positively cor_
related with days in post-anthesis sl-nce inereasing d.ays to
naturlty tends to give a longer post_anthesis period.
l,odgine. fhe associations between lodging and alpha_
aroylase, saccharifying activity and soLuble amino_nitrogen
were likely reflections <strong>of</strong> the negative assocíations <strong>of</strong> these
traits with kerneL weight, test weÍght, and plumprêss¡ coÍì-
bined wÍth the positive relationships between these agrononic
traits and lodging.
the negative correlation <strong>of</strong> loriging with barley nitrogen
tn C-70-1 was a reflection <strong>of</strong> the positÍve yielit to loctging
and negatlve yÍe1tt to barley nitrogen associations.
Quality parameters. ìr¡ith the exception <strong>of</strong> the âIphå-
anyl.ase to barley nitrogen correlatlon in C_?O-3, the
interreLatlonships in the present study were generally
positive. This would be expected since the traÍts are
essentially measures <strong>of</strong> nitrogen and enzyme levels which
are generally dependent on the nitrogen status <strong>of</strong> the <strong>plant</strong>.
fhe negative relationship between alpha_amylase and
barl-ey nS.trogen in C-?0-3 may have been nerely fortuitous,
or coulC have been the resuLt <strong>of</strong> the early senescence
characteristlc <strong>of</strong> that population. In the other populations,
L95