Some effects of vernalization on the reproductive capacity of Lolium perenne L.

Vernalization requirements of grasses are reviewed, and data are given on experiments with perennial ryegrass showing considerable differences in vernalization behaviour between clones. Incomplete vernalization often increased the number of spikelets/inflorescence. Effects of soluble carbohydrate level are discussed. Experiments in which plants of perennial ryegrass were transferred into and out of a glasshouse during Jan.-Mar. indicated that the vernalization stimulus was not translocated between tillers. (Abstract retrieved from CAB Abstracts by CABI’s permission)