Under this heading attention will be directed in this paper to the following well supported facts :
(1) In the states west of Lake Michigan no important advances have been made in the great work of adapting fruits to our peculiar climate and soil by growing seedlings from the varieties introduced from Southwest Europe, nor from their seedlings originating in the Eastern or Southern States.
(2) Our valuable seedlings of the orchard and garden fruits have come from the varieties introduced from East Europe or North Asia, and from our native species.
(3) Methodic crossing and hybridizing have given in the past, and promise to give in the near future, more valuable and certain results than we can hope for from chance breeding from intermingled varieties and species.
"Breeding of the orchard and garden fruits,"
Bulletin: Vol. 2
, Article 7.
Available at: https://lib.dr.iastate.edu/bulletin/vol2/iss14/7