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

plumpness, level- <strong>of</strong> alpha-any1ase, percent barley nitrogen
and soluble aníno-nitrogen, 0f these traits cv. "Bonanza"
differed only in that it was lower in kernef weight and
alpha-amyl-ase, and higher in pereent ba!.ley nitrogen and
soluble amino-nitrogen, than were the rneans <strong>of</strong> the experl-
r'rental populations. 0n a mean basis, population C-7O-3
was significantly shorter than the others, which were both
slíghtLy shorter than the control. 0vera11 decreased
<strong>height</strong> <strong>of</strong> population C-7O-3 was emphasized by the fact that
its tallest line was shorter than Bonanza. The greater mean
<strong>plant</strong> <strong>height</strong> <strong>of</strong> C-70-1 and, C-7O-2 reflected the fact that
these populatíons had lines taller thån the eontrol, and
had more taller llnes than shorter f.ines, re l-atíve to C-7o-3
(ra¡re 9).
Bonanza had more kernels per spike than any <strong>of</strong> the
populations and C-70-3 had significantly fewer than the
other populations.
C-7A-2 had a greater mean number <strong>of</strong> days to heading
than C-?0-1 and C-10-J, which did not differ from each other
or the check. Population C-7O-j was earlier maturíng, with
Banar.z,a next, followed by the other populations" Íhe same
ranking occurred for days in post-anthesis.
All populations were more resistant to lodging on a
mean basis than was Bonanza. Differences between populations
were difficult to determine due to large environmental
influences but it seemed that C-7O-3 was most resÍstant
followed by C-?A-Z and C-70-1, the Least resistant.
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