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

Research Station, Brand on, Manitoba. Grovring condj-tions
were excellent in 1973. Ín 1974 seeding was delayed and
germination hampered by wet spring conditions at Brarrdon,
and both sites suffered drought stress later in the season"
Seeding dates in L9?3 we're May B at Brandon and May 16 at
Winnipeg, and ín 1974, \úay 25 at Brandon arrd. illay 18 at
Winnipeg.
In :..973 the plots consisted <strong>of</strong> 2 rows 2.4 rneters long,
with lo cm. spaees between rows and- 61 cm. spaees between
plots. Every fifth plot was a control genotype, In 1974
the plot design was identical- except that the length <strong>of</strong> plot
was 3.1 meters and control-s were less frequent. All plots
were seeded at rates approximating nornal field <strong>plant</strong>ing
rates based on a uniform seed number per plot.
lhe following measurernents were taken on eaeh plot:
(r) punt Height - taken in cm. just prior to maturity,
measured from ground leve1 to top <strong>of</strong> spike.
(z) yiefa - recorded as grams per plot. All plots were
hand harvested and threshed in a Hege Combine ín
r.97 3 and in a stationary Vogel Plot Thresher in
I97+, In l-973 the center l".B meters <strong>of</strong> both rows
was harvested fron each p1ot, fn L97 4 the center
2.4 meters <strong>of</strong> both rows was harvested at Winnipeg,
while at Brandon only one 2.4 meter section <strong>of</strong> the
row \\ras harvested.
(3) Kernels per spike - based on hand counts <strong>of</strong> 10
spikes per p1ot, taken ât random.
OF ¡ìIANIIoBA
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