Some striped racemes bear a few red
flowers, which ordinarily are inserted on one side of the spike only. As
they often cover a sharply defined section of the raceme, this
circumstance has given rise to the term of sectional variability to
cover such cases. Sometimes the section is demarcated on the axis of the
flower-spike by a brownish or reddish color, sharply contrasting with
the green hue of the remaining parts. Sectional variation may be looked
at as a [318] special type of bud-variation, and from this point of view
we may simplify our inquiry and limit ourselves to the inheritance of
three types, the striped plants, the red plants and the red asexual
variants of the striped individuals. In each case the heredity should be
observed not only for one, but at least for two successive generations.
Leaving these introductory remarks I now come at once to the
genealogical tree, as it may be deduced from my experiments:
Year
1896 95% Striped 84% Red
| |
1895 Striped Individual Red Indiv.
\ /
1895 98% Striped 71% Red
| |
1894 Striped branches. Red branches.
\ /
1894 98% Striped 76% Red
| |
1893 90% Striped Indiv.
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