Thirty flowers on the crossed plants in Pots 1 and 4 (Table 6/79) were
again crossed, and produced seventeen capsules. Thirty flowers on the
self-fertilised plants in the same two pots were again self-fertilised,
but produced only seven capsules. The contents of each capsule of both
lots were placed in separate watch-glasses, and the seeds from the
crossed appeared to the eye to be at least double the number of those
from the self-fertilised capsules.
In order to ascertain whether the fertility of the self-fertilised
plants had been lessened by the plants having been self-fertilised for
the three previous generations, thirty flowers on the crossed plants
were fertilised with their own pollen. These yielded only five capsules,
and their seeds being placed in separate watch-glasses did not seem more
numerous than those from the capsules on the self-fertilised plants
self-fertilised for the fourth time. So that as far as can be judged
from so few capsules, the self-fertility of the self-fertilised plants
had not decreased in comparison with that of the plants which had been
intercrossed during the three previous generations. It should, however,
be remembered that both lots of plants had been subjected in each
generation to almost exactly similar conditions.
Seeds from the crossed plants again crossed, and from the
self-fertilised again self-fertilised, produced by the plants in Pot 1
(Table 6/79), in which the three self-fertilised plants were on an
average only a little taller than the crossed, were used in the
following experiment.
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