Seeds were also sown thickly on the two sides of a large
pot (3), the seedlings being afterwards thinned, so that an equal number
was left on each side; the three tallest on each side being measured.
The pots were kept in the greenhouse, and the plants were trained up
sticks. For some time the young crossed plants had no advantage in
height over the self-fertilised; but their leaves were larger. When
fully grown and in flower the plants were measured, as follows:--
TABLE 6/76. Petunia violacea (first generation).
Heights of plants measured in inches.
Column 1: Number (Name) of Pot.
Column 2: Crossed Plants.
Column 3: Self-fertilised Plants.
Pot 1 : 30 : 20 4/8.
Pot 2 : 34 4/8 : 27 4/8.
Pot 3 : 34 : 28 4/8.
Pot 3 : 30 4/8 : 27 4/8.
Pot 3 : 25 : 26.
Total : 154 : 130.
The five tallest crossed plants here average 30.8, and the five tallest
self-fertilised 26 inches in height, or as 100 to 84.
Three capsules were obtained by crossing flowers on the above crossed
plants, and three other capsules by again self-fertilising flowers on
the self-fertilised plants. One of the latter capsules appeared as fine
as any one of the crossed capsules; but the other two contained many
imperfect seeds. From these two lots of seeds the plants of the
following generation were raised.
CROSSED AND SELF-FERTILISED PLANTS OF THE SECOND GENERATION.
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