"The constant characters which appear in the various generations of a hybrid are those which are transmitted unchanged from the parental plants."

"I have seen the future of biology, and it is in the numbers."

"If I were to live a hundred years, I would not have enough time to test all the possible combinations."

"I have spent more time with peas than with people."

"This circumstance is especially important for the evolutionary history of plants because constant hybrids acquire the status of new species."