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

elatively high. With ¡ninor exceptions, they were <strong>of</strong>
simílar magnitude rela.tive to each other, as had been the
case for those prev5.ously reported (Table L). Esti.mates
for <strong>plant</strong> <strong>height</strong> (83 to 89%) and, far 2OO kernet weight
(?f to ?B/") were high and consistent over a1l populatíons.
the estinated heritabilities <strong>of</strong> test weight (58 ta 68%),
percent plunpness (62 to 69/") anA days in post-anthesis
{62 to 68/") were lower but also consistent over the populations
studied. 0f these characteristic s, only the estinated
heritability for <strong>plant</strong> heíght d.eviated from prevíous reports
being higher in the present study,
Contrary to the literature (gaUle 1), the heritability
estinates for days to heading and to maturity were not
consistent over the three populations. However, the inter-
medíate to high magnitudes, 6) ta B0/" and 6o to 83ft
respectively, were consistent with previous reports (?able l)"
Rasmusson and ûlass OgAZ ) reported siailar variability
between populations for days to heading.
The literature surveyed gave no previous indication <strong>of</strong>
an heritability estirnate for the parameter days in postanthesis.
The result in the present study was moderately
high heritability (62 to 68/"), co,nsisteni across populations.
HeritabilÍties for kernels per spike were variable, with
population C-7O-2 sho$/ing an estimate af ?2% as compared to
48 and 5ly'" for the other populations. this variability also
existed in previous reports (îable 1).
Heritability estimates for yield in this study were low
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