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ISHS Acta Horticulturae 953: XXIV International Eucarpia Symposium Section Ornamentals: Ornamental Breeding Worldwide

PREDICTING LONGEVITY OF CELOSIA ARGENTEA L. SEEDS DURING STORAGE

Authors:   I.O. Daniel, M. Kruse, A. Börner
Keywords:   Celosia argentea, genetic resources conservation, seed storage, viability constants
DOI:   10.17660/ActaHortic.2012.953.44
Abstract:
Celosia argentea has food and ornamental importance in West Africa and has been identified as one of the 24 vegetable species known to be undergoing genetic erosion, ranking second in priority on global scale for genetic resources conservation intervention. In a seed storage experiment to estimate seed viability constants for C. argentea, seeds of an accession were stored at relative humidity ranging between 28 and 90% under 45°C. Viability during storage was assessed at pre-determined intervals to estimate CW, which quantifies the relative effect of change of moisture content on longevity, and KE, which quantifies inherent longevity. Viability constant estimates for C. argentea seeds were KE=4.957 and CW=1.188. Potential applications of the estimated constants were described in the paper. For example, these constants were used to predict longevity for seeds stored under ambient temperature conditions of tropical seed stores with and without drying. These predictions showed precisely how drying seeds down to 5% moisture content before storage under tropical conditions can improve the longevity of C. argentea seed stocks. The predictions demonstrate the potential usefulness of the constants as a decision support tool for seed genebank management routine.

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