As in the last generation, many of the self-fertilised seeds germinated
before the crossed.
Seeds in an equal state of germination were planted on the opposite
sides of three pots. The crossed seedlings soon greatly exceeded in
height the self-fertilised. In Pot 1, when the tallest crossed plant was
10 1/2 inches high, the tallest self-fertilised was only 3 1/2 inches;
in Pot 2 the excess in height of the crossed was not quite so great. The
plants were treated as in the last generation, and when fully grown
measured as before. In Pot 3 both the crossed plants were killed at an
early age by some animal, so that the self-fertilised had no
competitors. Nevertheless these two self-fertilised plants were
measured, and are included in Table 6/77. The crossed plants flowered
long before their self-fertilised opponents in Pots 1 and 2, and before
those growing separately in Pot 3.
TABLE 6/77. Petunia violacea (Second generation).
Heights of plants measured in inches.
Column 1: Number (Name) of Pot.
Column 2: Crossed Plants.
Column 3: Self-fertilised Plants.
Pot 1 : 57 2/8 : 13 4/8.
Pot 1 : 36 2/8 : 8.
Pot 2 : 44 4/8 : 33 2/8.
Pot 2 : 24 : 28.
Pot 3 : 0 : 46 2/8.
Pot 3 : 0 : 28 4/8.
Total : 162.0 : 157.5.
The four crossed plants average 40.5, and the six self-fertilised 26.25
inches in height; or as 100 to 65.
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