Nature and Genetic Control of the Vernalization Response In Phalaris Tuberosa L.

Abstract

Vernalization of seed promoted flowering in P. tuberosa, particularly in ecotypes with an obligate cold requirement. The rate of thermoinduction was slower in seed than in seedlings, but all ecotypes responded to seed vernalization by flowering earlier and at a smaller leaf number. Also, combinations of vernalization of seed and seedling were additive in their promotion of flowering.