The inheritance of rubricalyx bud color in crosses with Oenothera Lamarckiana

Some years ago(2) the cross between Oenothera Lamarckiana and Oe. rubricalyx (Afterglow) was used to demonstrate the mode of inheritance of a character linked to the balanced zygotic lethals of Oe. Lamarckiana. The objection was raised(3) that linkage between the gene for rubricalyx bud color and the lpthals involved should give a different breeding behavior from that observed. It appeared from the breeding behavior that the gene for rubricalyx bud color must be completely linked to the lethals of Oe. Lamarckiana in certain plants of similar parentage to others in which the gene was independent of the lethals. At the time this seemed an anomalous situation. The crosses between Oe. Lamarckiana and Oe. rubricalyx have been repeated and a check has been kept on the chromosome configurations of the various hybrids in an attempt to determine the cause of the differences in the linkage relationships.