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

increased lodging in two barley experiments (Bockstaele and.
Maddens, 1966; Day and lhompson, I9?O).
Higher seeding rates gave decreased <strong>plant</strong> <strong>height</strong> in
oats (Folkins and Kaufnann, L9?4), in barley (Bockstaele
and Maddens, L966), and in wheat (Pe1ton, 1969; SJ--Hattab
et al., I9?O), while Cl-ement (I9?2) reported the opposite
effect in wheat. Aturcd (19?0) and Fi¡rlay et al-. (fpZf)
working with barley and Briggs (f975) working with wheat,
reported either variable or no effects <strong>of</strong> density on <strong>plant</strong>
he Íght .
lloodlvard (L956) working with wheat, oats and barley
reported that lower seeding rates resulted in higher test
weight. However, Briggs (I9?5) working with wheat, and
Middleton et al. (f964) and Day and Thompson (f970) ¡otfr
working with barley, reported no effect <strong>of</strong> seeding rate on
test weight.
From a barley experiment Day and Thompson (1pf0) re-
ported the number <strong>of</strong> days to maturity decreased as the rate
<strong>of</strong> pLanting went up, as did Young and Bauer (19?1) and
Briggs (I9?5), both working with wheat. Finlay et al.
(Lg?I) reported a decreased number <strong>of</strong> days to heading as
seed rate increased in barley, as did Clements (1pf2) with
wheat .
Folkins and Kaufmann (I9?4) reported that stern size
decreased with increased <strong>plant</strong>ing rate in an oat experiment.
Woodward (1956) reported a simil-ar deerease in straw stiff-
ness in his work wi.th wheat, oats, and barley.
JO