84, and the seven remaining self-fertilised
plants 51.78 inches in height, or as 100 to 96; and this difference is
so small that the crossed and self-fertilised plants may be considered
as of equal heights.
In addition to these plants, three crossed plants were planted
separately in three large pots, and three self-fertilised plants in
three other large pots, so that they were not exposed to any
competition; and now the self-fertilised plants exceeded the crossed in
height by a little, for the three crossed averaged 55.91, and the three
self-fertilised 59.16 inches; or as 100 to 106.
CROSSED AND SELF-FERTILISED PLANTS OF THE THIRD GENERATION.
TABLE 6/86. Nicotiana tabacum (third generation). Seedlings from the
self-fertilised plant A in pot 3, Table 6/85, of the last or second
generation.
Heights of plants measured in inches.
Column 1: Number (Name) of Pot.
Column 2: From Self-fertilised Plant, crossed by a Crossed Plant.
Column 3: From Self-fertilised Plant again self-fertilised, forming the
third Self-fertilised generation.
Pot 1 : 100 2/8 : 98.
Pot 1 : 91 : 79.
Pot 2 : 110 2/8 : 59 1/8.
Pot 2 : 100 4/8 : 66 6/8.
Pot 3 : 104 : 79 6/8.
Pot 4 : 84 2/8 : 110 4/8.
Pot 4 : 76 4/8 : 64 1/8.
Total : 666.75 : 557.25.
As I wished to ascertain, firstly, whether those self-fertilised plants
of the last generation, which greatly exceeded in height their crossed
opponents, would transmit the same tendency to their offspring, and
secondly, whether they possessed the same sexual constitution, I
selected for experiment the two self-fertilised plants marked A and B in
Pot 3 in Table 6/85, as these two were of nearly equal height, and were
greatly superior to their crossed opponents.
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