Abstract
The seed viability equation uses species viability constants to predict seed longevity under different storage conditions. There are already established universal values of constants that account for the effect of temperature on seed longevity (CH and CQ) which can be applied to different crop species. However, constants accounting for the effect of seed moisture (CW) and genotype (KE) are species-specific. This study aimed to derive viability constants and predict seed longevity for African eggplant (Solanum aethiopicum) under genebank conditions. The seeds were subjected to experimental storage at 40°C and different seed moisture contents (6, 8, 10 and 12%) for 120 days to derive survival curves and hence, CW and KE. CW and KE values for S. aethiopicum were 3.32 and 7.4978, respectively. The validation of the derived constants show that they can be used to predict seed longevity of other seed lots within the same species. The genebank curators and other commercial seed technologists may be able to accurately predict longevity of African eggplant seeds under cold dry storage conditions using the improved viability equation and the constants established in this research.
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