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

this resulted primarily frorn the generally earlier heading
<strong>of</strong> C70301ì and C?A3o32 and the Late headÍng <strong>of</strong> C/Õ2û24.
Mín:n 64-62 headed later, and Bonanza headed early, as
conpared to their respective <strong>plant</strong> heíght category ñeârrs¡
F x G interaction was significant at ioatin l9?S sites,
and the means are presented Ín fables 3U anrj 35, Ât tarnan
(fable 3þ) tire interaetion was due to Bonanza and C?o3011
exhibitíng significantly earlíer heading due to increased
N while the other genotypes showed no signifícant response.
fhe F x G interaction at Portage (Table lJ) was eaused by
a sinj"Lar situation, wítt1 C?OZO24r C?03011 and. C?O3O3Z
showing the response to N.
Days to lvlaturity" Datâ for this character were not taken
at, Canre;n, 19?6, Applied N signífieantly affeeted rnaturity
only at Carman, L975 and Sanford, 19?6 (Tab:e 36), The
effect <strong>of</strong> N was to delay maturity (faUte j?C). lhe delay
at Sanford came with the first N l_ncrement, but the effect
at Car¡ran 1975 did not occur untiL the second N increment.
fhe se¡ni-dwarf group, in this study, natured earli.er
than the tal1 genotypes at al1 sites (Table 3?B), However,
C7O3011 and C7O3O32 were consistently the earliest, C?OZOZ4
and Minn 64-6e consistently the latest and Bonanza inter-
mediate for days to maturity (fabte 3Z¿).
lhe Carman, A9Z5 F x G interaetion (Table 16) is
explained by the resuLts presented in Table l8B" Bonanza