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Prediction of seed longevity: a modification of the shape of the Ellis and Roberts seed survival curves

Published online by Cambridge University Press:  22 February 2007

A. Mead  and
D. Gray
A. Mead*
Affiliation:
Biometrics Department, Warwick CV35 9EF, UK
D. Gray
Affiliation:
Crop and Weed Science Department, Horticulture Research International, Wellesbourne, Warwick CV35 9EF, UK
*
* Correspondence Email: andrew.mead@hri.ac.uk
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Abstract

The prediction of the viability of stored seeds is important both for the management of germplasm collections and for the management of commercial seed production and storage. The Ellis and Roberts model for seed viability during storage is examined, and an inadequacy of the model highlighted. A modification is proposed, based on the ‘control mortality’ probit model developed for insecticide bioassays, to take proper account of variation in initial viability. This new ‘control viability’ model, relating seed viability to storage time, is fitted to data from a carrot seed storage experiment and found to fit well for a range of storage environments. A relationship, similar to that proposed by Ellis and Roberts for the effects of storage conditions on the rate of loss of viability, is fitted to the estimated rates from this new model. Data from a second carrot seed storage experiment are used to validate this relationship.

Keywords

carrotmodelmoistureseed viabilitystoragetemperature
Type
Research Article
Information
Seed Science Research , Volume 9 , Issue 1 , January 1999 , pp. 63 - 73
Copyright
Copyright © Cambridge University Press 1999

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