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

population, using individual line means from the whole
experiment. Honogeneity <strong>of</strong> correlation coefficients was
calculated as outlined by Steel and TorrÍe (f96O), and when
such were found to be homogeneous across the three populations,
pool-ed correlation values were computed.
Data fron control plots did not enter into the analyses
described above. This data was used only for purposes <strong>of</strong>
the breeding project from which all the rnaterial was taken.
The purpose <strong>of</strong> thís study was to determine the response
<strong>of</strong> three semi-dwarf and two ta11 barley genotypes (described
in Îable 4) to high levels <strong>of</strong> applied nítrogen fertilizer,
and to determine if any significant nitrogen fertilizer by
genotype interaction occurred.
A four replicate split plot experiment was <strong>plant</strong>ed in
fïve environments; the University <strong>of</strong> Manitoba l\¡eed Research
site at Carman, Manitoba ín L975 and I)16, at the Sisson's
Farrn l-,td. site at Portage La Prairie, Manitoba Ln J-975 and
LQl6, and at the G. Kabernick far¡n site at Sanford, Manitoba
in L976.
lhe sites are described below:
Site
Carman IÇfJ
?ortage I)lJ
Soil lype
Very Fine
Sandy T,oan
Very Fine
Sandy Loam
Previous Crop
0at s
Wheat
45
Avai lab1e
so i t-N-¡:ZE--'¡r( ke.,/ha. )
¿y. r
37 ,0