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

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SUGGESÎIONS FOR FUiIIIÂE RESEARC}{
Selection for short statured genotype s sirould be
carried out in large Fa populations <strong>of</strong> tall- by semi_
dwarf crosses sinee the numbe:" <strong>of</strong> seni_d.warf segregates
is small". These small numbers represent a natural
barrier to selection <strong>of</strong> a short line with the desired
Ie¡¡el- <strong>of</strong> yield or any <strong>of</strong> íts components, The nurseries
should also be sparsely <strong>plant</strong>ed since the shorter
seg'egates are less competitive and- rnay be overl00ked
under crowded e ond itions,
Selection <strong>of</strong> a singfe shori-strav¡ed line with the
desj-red yie1d. component balance may be possitrle, but
the author feels a more reasonable approach might be to
select short lines with a desired 1evel <strong>of</strong> each in-
dividual" component and intercross these to obtain the
desired end product.
To improve upon the research condueied j-n the present
study it míght be advised to use specific nunbers <strong>of</strong>
lines (preferably isolines) fr"om each <strong>height</strong> category¡
tall, ínterrnediate and semi-dwarf. Ii woul-d also be
useful to use more than one parental source for short
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