Some other
self-fertilised plants which had been raised separately in larger pots
produced several spontaneously self-fertilised pods under a net, and
seeds from these were used in the following experiment.
CROSSED AND SELF-FERTILISED PLANTS OF THE SECOND GENERATION.
The spontaneously self-fertilised seeds just mentioned, and crossed
seeds obtained by intercrossing the two crossed plants of the last
generation, after germinating on sand, were planted in pairs on the
opposite sides of three large pots. When the seedlings were only 4
inches in height, the crossed had a slight advantage over their
opponents. When grown to their full height, every one of the crossed
plants exceeded its opponent in height. Nevertheless the self-fertilised
plants in all three pots flowered before the crossed! The measurements
are given in Table 5/52.
TABLE 5/52. Lupinus luteus.
Heights of plants measured in inches.
Column 1: Number (Name) of Pot.
Column 2: Crossed Plants.
Column 3: Self-fertilised Plants.
Pot 1 : 33 2/8 : 24 4/8.
Pot 1 : 30 4/8 : 18 4/8.
Pot 1 : 30 : 28.
Pot 2 : 29 4/8 : 26.
Pot 2 : 30 : 25.
Pot 3 : 30 4/8 : 28.
Pot 3 : 31 : 27 2/8.
Pot 3 : 31 4/8 : 24 4/8.
Total : 246.25 : 201.75.
The eight crossed plants here average 30.78, and the eight
self-fertilised 25.21 inches in height; or as 100 to 82. These plants
were left uncovered in the greenhouse to set their pods, but they
produced very few good ones, perhaps in part owing to few bees visiting
them.
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