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Increased Post‐Inductive Photoperiods for Delayed Flowering in Saccharum sp. Hybrids 1
Author(s) -
Moore Paul H.,
Heinz Don J
Publication year - 1971
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1971.0011183x001100010042x
Subject(s) - biology , photoperiodism , inflorescence , saccharum , hybrid , saccharum officinarum , long day , horticulture , botany
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.