Comparison with 1872 |
|
with different degrees of facility on the quince; so do different varieties of the apricot and peach on certain varieties of the plum. |
|
As Gärtner found that there was sometimes an innate difference in different
individuals
of
the same two species in crossing; so
Sageret Sageret 1866 1869 1872 | Sagaret 1859 1860 1861 |
believes this to be the case with different individuals of the same two species in being grafted together. As in reciprocal crosses, the facility of effecting an union is often very far from equal, so it sometimes is in grafting; the common gooseberry, for instance, cannot be grafted on the currant, whereas the currant will take, though with difficulty, on the gooseberry. |
|
We have seen that the sterility of hybrids, which have their reproductive organs in an imperfect condition, is a
....... 1866 1869 1872 | very 1859 1860 1861 |
different case from the difficulty of uniting two pure species, which have their reproductive organs perfect; yet these two distinct
classes of cases classes of cases 1872 |
cases 1859 1860 1861 1866 1869 |
run to a
large large 1872 | certain 1859 1860 1861 1866 1869 |
extent parallel. Something analogous occurs in grafting; for Thouin found that three species of Robinia, which seeded freely on their own roots, and which could be grafted with no great difficulty on
a fourth a fourth 1872 | another 1859 1860 1861 1866 1869 |
species, when thus grafted were rendered barren. On the other hand, certain species of Sorbus, when grafted on other
species species 1872 | species, 1859 1860 1861 1866 1869 |
yielded twice as much fruit as when on their own roots. We are reminded by this latter fact of the extraordinary
cases cases 1869 1872 | case 1859 1860 1861 1866 |
of Hippeastrum,
Passiflora, Passiflora, 1866 1869 1872 | Lobelia, 1859 1860 1861 |
&c., which
seed seed 1866 1869 1872 | seeded 1859 1860 1861 |
much more freely when fertilised with the pollen of
a distinct a distinct 1869 1872 | distinct 1859 1860 1861 1866 |
species, than when
fertilised fertilised 1861 1866 1869 1872 | self-fertilised 1859 1860 |
with
pollen from the same plant. pollen from the same plant. 1869 1872 |
their own pollen. 1859 1860 1861 1866 |
|
|
We thus see,
that, that, 1866 1869 1872 | that 1859 1860 1861 |
although there is a clear and
great great 1869 1872 | fundamental 1859 1860 1861 1866 |
difference between the mere adhesion of grafted stocks, and the union of the male and female elements in the act of reproduction, yet that there is a rude degree of parallelism in the results of grafting and
|
with different degrees of facility on the quince; so do different varieties of the apricot and peach on certain varieties of the plum. |
|
As Gärtner found that there was sometimes an innate difference in different
individuals of of 1859 1860 1866 1869 1872 |
of
1861 |
the same two species in crossing; so
Sagaret Sagaret 1859 1860 1861 | Sageret 1866 1869 1872 |
believes this to be the case with different individuals of the same two species in being grafted together. As in reciprocal crosses, the facility of effecting an union is often very far from equal, so it sometimes is in grafting; the common gooseberry, for instance, cannot be grafted on the currant, whereas the currant will take, though with difficulty, on the gooseberry. |
|
We have seen that the sterility of hybrids, which have their reproductive organs in an imperfect condition, is a
very very 1859 1860 1861 | very 1866 1869 1872 |
different case from the difficulty of uniting two pure species, which have their reproductive organs perfect; yet these two distinct
cases cases 1859 1860 1861 1866 1869 |
classes of cases 1872 |
run to a
certain certain 1859 1860 1861 1866 1869 | large 1872 |
extent parallel. Something analogous occurs in grafting; for Thouin found that three species of Robinia, which seeded freely on their own roots, and which could be grafted with no great difficulty on
another another 1859 1860 1861 1866 1869 | a fourth 1872 |
species, when thus grafted were rendered barren. On the other hand, certain species of Sorbus, when grafted on other
species, species, 1859 1860 1861 1866 1869 | species 1872 |
yielded twice as much fruit as when on their own roots. We are reminded by this latter fact of the extraordinary
case case 1859 1860 1861 1866 | cases 1869 1872 |
of Hippeastrum,
Lobelia, Lobelia, 1859 1860 1861 | Passiflora, 1866 1869 1872 |
&c., which
seeded seeded 1859 1860 1861 | seed 1866 1869 1872 |
much more freely when fertilised with the pollen of
distinct distinct 1859 1860 1861 1866 | a distinct 1869 1872 |
species, than when
self-fertilised self-fertilised 1859 1860 | fertilised 1861 1866 1869 1872 |
with
their own pollen. their own pollen. 1859 1860 1861 1866 |
pollen from the same plant. 1869 1872 |
|
|
We thus see,
that that 1859 1860 1861 | that, 1866 1869 1872 |
although there is a clear and
fundamental fundamental 1859 1860 1861 1866 | great 1869 1872 |
difference between the mere adhesion of grafted stocks, and the union of the male and female elements in the act of reproduction, yet that there is a rude degree of parallelism in the results of grafting and
|