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

did Syme (f972), Fonseca and patterson (1968) and lebsock
and Amaya (tgøg) in wheat studies, that no retationship
existed" îhis was not surprising, since Rasmusson (Lg?3)
indicated the original se¡ni-dwarf was selected for head.
type. Height showed a sÍgnificant negative correlation
with days to heading Ín C-?0-1 and t-?0-3 while the
relationship was negative but non-signÍficant in C-?o-Z.
fhis generally negative association was reported by
Johnson et aI. (f966(a)) from wheat work while reports
from barfey studies have been either <strong>of</strong> a positive (Barker
et al., 1964), or a non-significant nature (Rutger et a1.,
L967). Days to rnaturity showed no associatÍon with <strong>height</strong>
except in C-70-1 Ín whÍch there was a sÍgnifieant negative
correlation. This correlatlon is in agreement with the
report <strong>of</strong> Fíuzat and Atkins (tgSl),
Plant <strong>height</strong> ehowed onLy homogeneous correlations with
the quality tralts, a13. non-significant.
Assoeiations with yieJ"d per plot showed no heterogeneous
corre Lat j"on groups across the three populations" posit-ive,
sígnificant correlations were obtained between yield and
kernels per spike, test weight, days in post-anthêsis and
degree <strong>of</strong> lodging. Significant negative relationships
existed between yield and days to heading, saccharifylng
activity, percent barley nitrogen and soluble amino-nitrogen.
No significant assoej-ation was revealed between yield and 200
kernel weight, percent plumpness, days to rnaturity or Level
<strong>of</strong> alpha-amy1a se "
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