Используйте «hybridisation» в предложении

1. The following conclusions are drawn up chiefly from Gartner's admirable work on the hybridisation of plants

2. As in hybridisation, so with grafting, the capacity is limited by systematic affinity, for no one has been able to graft together trees belonging to quite distinct families; and, on the other hand, closely allied species and varieties of the same species, can usually, but not invariably, be grafted with ease

3. But this capacity, as in hybridisation, is by no means absolutely governed by systematic affinity