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This article in CS

  1. Vol. 11 No. 1, p. 118-121
     
    Received: Sept 3, 1970
    Published: Jan, 1971


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doi:10.2135/cropsci1971.0011183X001100010042x

Increased Post-Inductive Photoperiods for Delayed Flowering in Saccharum sp. Hybrids1

  1. Paul H. Moore and
  2. Don J Heinz2

Abstract

Abstract

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.

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