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

c onpared 'r .
Two other important agronomic characteristics are the
number <strong>of</strong> days to head5.ng and the number <strong>of</strong> days to maturity.
Barker (f964), working with barley, reported a posit5-ve
correlation <strong>of</strong> <strong>plant</strong> <strong>height</strong> with number <strong>of</strong> days to heading,
while Rutger et al. (f967) indicated they found no relationship
between these characteristic s. Konishi (f976) indicated
that the dwarfing genes involved in hÍs study retarded heading.
In wheat both positive (Fonseca and Patterson, L96B¡
Dyck and Baker, L975) and, negative (Johnson et al. , L966(a))
relationships have been reported .
Plant <strong>height</strong> and maturity have been reported as positívely
associated in wheat ( Johnson et a1. L966(a) ¡ Kaufmann
et al., l-969), while T,ebsock and Amaya (1969) reported a
positive correlation in two <strong>of</strong> four crosses and no relatj"on-
ship in the others. Fiuzat and Atkins (fgfi) reported a
negative association between <strong>plant</strong> <strong>height</strong> and maturity in
bar ley.
Morphological changes may also lead to changes in
quality characteristics which are important in terms <strong>of</strong>
utilization and commercial acceptability. Test weight and
percent plurap kernels are important characteristics in
barley in terms <strong>of</strong> feeding and malting quality. Nasr gL åt.
(a973) indicated a positive correlation <strong>of</strong> <strong>height</strong> with per-
cent plumpne ss existed in four <strong>of</strong> seven crosses and the
sane for <strong>height</strong> and test weight in two <strong>of</strong> the seven crosses.
No significant associations were noted in the remaining
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