| → as I have found, 1859 1860 1861 1866 1869 |
| OMIT 1872 |
|
| → mongrels: 1859 1860 1861 1866 1869 |
| as I have found, mongrels: 1872 |
|
| → I suspect that it 1859 1860 1861 1866 1869 |
| It 1872 |
|
|
simply are these facts explained on the view of an occasional cross with a distinct individual being advantageous or indispensable! |
|
| If several varieties of the cabbage, radish, onion, and of some other plants, be allowed to seed near each other, a large
→as I have found,
of the seedlings thus raised
turn
→mongrels:
for instance, I raised 233 seedling cabbages from some plants of different varieties growing near each other, and of these only 78 were true to their kind, and some even of these were not perfectly true. Yet the pistil of each cabbage-flower is surrounded not only by its own six stamens, but by those of the many other flowers on the same
and the pollen of each flower readily gets on its own stigma without
for I have found that
carefully protected
the full number of pods. How, then, comes it that such a vast number of the seedlings are mongrelized?
→I suspect that it
must arise from the pollen of a distinct
variety
having a prepotent effect over
own pollen; and that this is part of the general law of good being derived from the intercrossing of distinct individuals of the same species. When distinct
species
are crossed the case is
for a
own pollen is
prepotent over foreign pollen; but to this subject we shall return in a future chapter. |
|
| In the case of a
tree covered with
flowers, it may be objected that pollen could seldom be carried from tree to tree, and at most only from flower to flower on the same
and
flowers on the same tree can be considered as distinct individuals only in a limited sense. I believe this objection to be valid, but that nature has largely provided against it by giving to trees a strong tendency to bear flowers with separated sexes. When the sexes are separated, although
|
