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Effects of Cross and Self Fertilisation in the Vegetable Kingdom by Charles Darwin
page 65 of 636 (10%)
[THE DESCENDANTS OF THE SELF-FERTILISED PLANT, NAMED HERO, WHICH
APPEARED IN THE SIXTH SELF-FERTILISED GENERATION.

In the five generations before the sixth, the crossed plant of each pair
was taller than its self-fertilised opponent; but in the sixth
generation (Table 2/7, Pot 2) the Hero appeared, which after a long and
dubious struggle conquered its crossed opponent, though by only half an
inch. I was so much surprised at this fact, that I resolved to ascertain
whether this plant would transmit its powers of growth to its seedlings.
Several flowers on Hero were therefore fertilised with their own pollen,
and the seedlings thus raised were put into competition with
self-fertilised and intercrossed plants of the corresponding generation.
The three lots of seedlings thus all belong to the seventh generation.
Their relative heights are shown in Tables 2/14 and 2/15.

TABLE 2/14. Ipomoea purpurea.

Heights of Plants in inches:

Column 1: Number (Name) of Pot.

Column 2: Self-fertilised Plants of the Seventh Generation, Children of
Hero.

Column 3: Self-fertilised Plants of the Seventh Generation.

Pot 1 : 74 : 89 4/8.
Pot 1 : 60 : 61.
Pot 1 : 55 2/8 : 49.

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