Increased Post-Inductive Photoperiods for Delayed Flowering in Saccharum sp. Hybrids1
- Paul H. Moore and
- Don J Heinz2
Fifty-nine clones, consisting of Saccharum sp. hybrids, S. spontaneum L., S. robustum Brandes and Jeswiet (✕ Grassl), and closely related genera hybridized with S. officinarum L., were subjected to combinations of preinductive and post-inductive photoperiods to dday their flowering and thus synchronize the emergence of their inflorescences with later-flowering Saccharum sp. hybrids.
The number of days delay in flowering varied among the clones tested and was correlated to the normal flowering dates. Early-season flowering clones were delayed more than were late-season flowering clones.
Most clones responded quantitatively to the illumination of the post-inductive photoperiod. Greatest delay of flowering was seen as response to long post-inductive photoperiods and highest supplementary illumination. A large number of days delay for flowering was often associated with low percentage flowering. Maximum percentage flowering and minimum days delay of flowering occurred in response to a combination of short postinductive photoperiods and low-level supplementary illumination.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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