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

MATERÏALS AND IETHODS
The experiment was designed to investigate the Ínter-
relationships <strong>of</strong> various agronomic and quality characteristics,
in particular the effect <strong>of</strong> <strong>reduced</strong> <strong>plant</strong> heì ght,
and to obtain estirnates <strong>of</strong> genetic variance and heritabiì-ity
for these characteristics in three six-rowed barley hybrids,
Hordeum vulgare 1,., each derived from a cross having one
semí-dwarf parent in comrnon. The pedigrees, descriptions
<strong>of</strong> and agronomic eomparisons between the parents, their
sources, and the numbers <strong>of</strong> lines used i-n each hybrid,
henceforth referred to as populations, are presented in
îable J.
lhe crosses.were made at the Universi.ty <strong>of</strong> Manj-toba in
1970 and the material was carried through the segregating
generations to F5 via single seed descent. The F2 and F3
l\¡ere grown at Winnípeg and the F4 was grown in CaLifornia.
No selection was done during this period. Therefore each
F5 line traced to a separate F2 <strong>plant</strong>.
T.n 1973 and l.974 the material was grown in a two-
replicate completely randomized block design experirnent at
each <strong>of</strong> two locations, the UnÍversity <strong>of</strong> Manitoba Crop
Research site, lfinnípeg, and at the Agricul-ture Canada
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