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

ferences between genotype s which were then descríbed by a
Duncanrs Multiple Range Test. Single degree <strong>of</strong> freedon
cornparísons were calculated to determine differences
between tall and semi-dv¡arf genotypic cl-asses.
Sinple phenotypíc correlations were calculated for the
paraneters rneasured and rank correlations were determined
to describe the relationship between these traits and <strong>plant</strong>
heíght, yiel"d, 2O0 kernel weight and percent plumpness.
These last four pararneters were determined fron previously
grown plots <strong>of</strong> these genot)¡pes.
fhis study was designed to determine if dífferences ín
root size existed between the members <strong>of</strong> a selected group <strong>of</strong>
tall and. semi-dwarf barley genotype s described in Table 6.
A five replieate cornpletely randomized block experiment
was conducted in the greenhouse ín 1975. Plants were grown
in five inch clay pots in a I¿2¡ 1 soil, sand, and peat moss
medium. Samples were taken once every seven days fro¡r 28 to
70 days after <strong>plant</strong>ing.
The <strong>plant</strong>s were renoved from the pots and the roots
were hand washed fron the medium, The roots were then
removed from the <strong>plant</strong>s, dried overnight at J0 degrees C,
and weíghed.
Analysis <strong>of</strong> variance was ealculated for each sampling
date to determine if differences existed between genotypes
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