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

Te st lr¡e icht
Being closely eorreJ.ated with kernel weight, test
weight was âffected by N in a sinilar fashíon. The increased
test we ight resul"ting fron providing adequate N fertility
demonstrated that inproved fertility gives rise to improved
physical kernel quality in barley.
Bonanza was the superior genotype and the semí_dwarfs,
especially cz03o11 ( larger spike size), were lowest for test
weight, again indicating the need to ímprove the kernel type
<strong>of</strong> these seml"-dwarfs "
The F x G in L9?5 suggested that applying N brought all
genotypes to a similar level for test weight, irnplying that
the serni-dwarfs tested had a greater need for improved
fertílity to aehieve desirable test weight"
Days tq Heading. Days to lr{aturity aqd Days in ?ost_Anthesis
Although there was little effect <strong>of</strong> applied N on the
nunber <strong>of</strong> days to headÍng, inereasing N did tend to inerease
the number <strong>of</strong> days to maturity and the length <strong>of</strong> the post_
anthesis period.
At the 1925 sites the zero N treat¡nents headed slightly
later probably becanse the lower fertility led to slower
earLy development <strong>of</strong> the naterial in those treatnents. The
reverse occurred at Sanford due to overall higher fertility;
coÌnbinêd with the tirning <strong>of</strong> rainfall ( just prior to heading)
at that site.
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