Genetical studies onOenothera. V

Bradley Moore Davis
1914 Molecular Genetics and Genomics  
VO Professor DE VRIES in his recent work "Grnppenweise Artbildung", 1913, has published data of the highest interest to the experimental workers with Oenothera and to breeders in general. I refer at this time especially to the remarkable differences exhibited by certain hybrids of reciprocal crosses, and to the extraordinary results reported when the reciprocals are crossed with one another to give double reciprocal, and with the parent stock to give sesqnireciprocal and iterative hybrids. The
more » ... triking peculiarity of the reciprocal crosses is their marked differences from one another and their great resemblance in certain characters to the pollen parent making them in these features strongly patroclinous. Breeders have, of course, for many years recognized the phenomenon of prepotency on the part of individuals and to a certain extent of species and races when crossed, but DE VRIES has brought forward cases in which species to a very marked degree exhibit prepotencies over others when they are the pollen parents of the hybrids. Breeders had before known that reciprocal crosses are not always identical as to their characters, but general experience had led them to expect similarity whereas in this material of Oenothera DE VRLES has found very striking differences. Furthermore, DE VRIES reports that when certain reciprocal hybrids of Oenothera are crossed with one another ~o give double reciprocals a uniform progeny appears which carries unaffected almost all of the characters of one of the original parents. The behavior of reciprocals and double reciprocals outlined above is best illustrated by material that seems likely to stand as classical in the field of genetics. Oenothera bienni~ pollinated by O. muricata gives a uniform F1 generation so strongly patroclinous with respect to Induktive Abstammungs-und Vererbungslehre. XII. 12
doi:10.1007/bf01837299 fatcat:c5mmbmuq7baf3miomoop52tite