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

Bonanza dropped consistently as seeding rate increased,
while for Mínn 64-62, it went up witìr the firs.ù seed rate
increment and remained constant thereafter.
u
The AN0V1, presented in iables 68 through fl, i_nd icate
that significant differences existed. between the genotypes
studied for coleoptile length, root nurnber, root score and
shoot length. significant differences existed between the
means <strong>of</strong> the two <strong>plant</strong> <strong>height</strong> groups (tall and serni_dwarf )
for coleoptile length and root number. the talls had longer
coleoptiles and more roots (table ?Z)" However, one taII
genotype, C7O3O|9, contributed greatly to the signlficant
differences betweên <strong>height</strong> groups in this experiment (fable
?2), îakahashi (A946) previously reponted a positive
association <strong>of</strong> <strong>plant</strong> <strong>height</strong> and coleoptile length in barley.
Correlations (Table 23) indicated that, for the geno_
*ypes studied, coleoptile length was significantly and
positively related to root number, kernel weight and pereent
pJ.umpness. Contrary to fakahashi's (1946) report, no
significant correlation was detectêd between <strong>plant</strong> <strong>height</strong>
and coleoptile length in the present study. However, as
previously stated, there was a significant difference between
<strong>height</strong> classes in favour <strong>of</strong> the talls.
Rank correlation also indÍcated that no reÌationship
exj.sted between coleoptile length and yield or energence