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

fluence <strong>of</strong> the length <strong>of</strong> the grain f-Í.Iling period on pLump_
ness, parti_cu1arly the earlier part <strong>of</strong> the filJ-ing period.
794
the positÍve relaticnships <strong>of</strong> plunpness and lodging in
C-?O-2 and C-?O-3 probably reflects the association <strong>of</strong> plunpness
with kerner we ight and the contribution <strong>of</strong> that trait
to the type <strong>of</strong> lodgíng which occurred.
The selecti-on <strong>of</strong> plump seeded malting lines in this
inateri-al, in particular C-IO-Z, ma}¡ be difficult. îhe
posítive assoc j"ation <strong>of</strong> plumpness with barley nitrogen
however is <strong>of</strong> ínterest since it suggests that p1u¡0p seeded
barJ-ey with an acceptable protein lever ean be obtained.
Thís type <strong>of</strong> barley is desireable in the feed industry.
Days to headine. A strong positive relationship
between this trait and days to rnaturity for populations
C-?0-1 and C-?O-? reflected similar developmental patterns
within genotypes i-n these crosses. The raek <strong>of</strong> significance
in C-7O-3 may have been a reflection <strong>of</strong> the differenee in
the rel"ationship between heading and maturity in that
population.
The significant negative association with days in
post-anthesis existed. since fewer days to heading leads
to more days in post-anthesis particularly when the range
in days to maturity is truncated. by environmentar stress.
lhe consistency <strong>of</strong> the relationships <strong>of</strong> heading date