51 inches; the
twenty-three intercrossed plants 30.38; and the twenty-three
self-fertilised plants 23.40 inches in height. We thus get the following
ratios:--
The Westerham-crossed plants in height to the self-fertilised as 100 to
91.
The Westerham-crossed plants in height to the intercrossed as 100 to
119.
The intercrossed plants in height to the self-fertilised as 100 to 77.
These plants were again measured when their growth appeared on a casual
inspection to be complete. But in this I was mistaken, for after cutting
them down, I found that the summits of the stems of the
Westerham-crossed plants were still growing vigorously; whilst the
intercrossed had almost, and the self-fertilised had quite completed
their growth. Therefore I do not doubt, if the three lots had been left
to grow for another month, that the ratios would have been somewhat
different from those deduced from the measurements in Table 6/82.
TABLE 6/82. Petunia violacea.
Heights of plants measured in inches.
Column 1: Number (Name) of Pot.
Column 2: Westerham-Crossed Plants (from self-fertilised Plants of
fourth generation crossed by a fresh stock).
Column 3: Intercrossed Plants (Plants of one and the same stock
intercrossed for five generations).
Column 4: Self-fertilised Plants (self-fertilised for five generations).
Pot 1 : 64 5/8 : 57 2/8 : 43 6/8.
Pot 1 : 24 : 64 : 56 3/8.
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