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

(,tssl) .
As ín the reports by Chandle:' (1969) for riee, and
Briggle and Yoge1 (a968) for wheãt, the present str.rdy
indj-cated there was significantly more lodging in the tall
genotypes than the semi-dwarfs at both sites (îable Z5B),
Sígnificant F x G interaction occurred at both sites
(ta¡fe Z4). At CarrÂan the interaction (Table 26) resulted
from Cf02O24 showing increased lodging with more applied N
while the other genctypes showed no significant responseo
At Portage the interaction (Tabl-e 2?) arose due to tr¡¡o
seni-dwarfs, C7O3O32 and lllinn 64-62, showing no r.esponse to
applied N while the other genot;4>es, in particular th€ tal-ls,
responded positively to the first tv¡o N increments.
C|O3O)Z and Minn 64-62 were the most lodging resistant
and ÇfO2O24 the rnost susceptibie genotypes 3.n this study
( raul-e z5¡. ) "
Test We igLt. This character was significantly affected by
applíed N at onty the two t9Z5 siies (ta¡fe eA)" At both
sites the initial N increment gave increased test weight,
while further increinents gave no change at Carnran, but
resulted in a decrease to original 'levels at portage (table
29C). Si"rnilar results were reported by Reisenauer and.
Diekson (ryøA) for ihe closely related character <strong>of</strong> kernel
plurnpne s s in barley.
As indicated. by data in lable 2pB, differences ån
favou:' <strong>of</strong> the talls existed between <strong>height</strong> classes at only
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