The
self-fertilised capsules from the self-fertilised plants of the first
generation yielded the much lower average of 35.95 seeds; but as these
latter plants grew extremely crowded, nothing can be inferred with
respect to this difference in their self-fertility. The seedlings raised
from the above seeds constitute the plants of the fourth self-fertilised
generation in Table 4/47.
Twelve flowers on the same plants of the third self-fertilised
generation, in Table 4/46, were crossed with pollen from the crossed
plants in the same table. These crossed plants had been intercrossed for
the three previous generations; and many of them, no doubt, were more or
less closely inter-related, but not so closely as in some of the
experiments with other species; for several carnation plants had been
raised and crossed in the earlier generations. They were not related, or
only in a distant degree, to the self-fertilised plants. The parents of
both the self-fertilised and crossed plants had been subjected to as
nearly as possible the same conditions during the three previous
generations. The above twelve flowers produced ten capsules, containing
on an average 48.66 seeds, with a maximum in one of seventy-two seeds.
The plants raised from these seeds may be called the INTERCROSSED.
Lastly, twelve flowers on the same self-fertilised plants of the third
generation were crossed with pollen from plants which had been raised
from seeds purchased in London.
Pages:
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215