Effects of shell and low moisture content on peanut seed longevity

Rao, N.K. and Sastry, D.V.S.S.R. and Bramel, P.J. (2002) Effects of shell and low moisture content on peanut seed longevity. Peanut Science, 29 (2). pp. 122-125.

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Peanut (Arachis hypogaea L.) germplasm accessions in ICRISAT genebank are conserved as pods under medium-term conditions (4 C and 30% RH). Pod storage requires far greater space than seed storage and is more likely to be expensive, especially in a controlled environment. With the objective to evolve cost effective strategies for conservation, the survival of in-shell and shelled seeds of two peanut cultivars, ICGS 76 (virginia bunch) and JL24 (spanish), was studied under three different storage conditions— ambient (20-40 C and 30-80% RH), short term (23-25 C and 40-50% RH), and medium term (4 C and 30% RH). In-shell seeds had marginally greater longevity than shelled seed in all storage conditions. The differences in time for regeneration of in-shell and shelled seeds stored under medium term conditions were estimated to be less than 4 mo for both the cultivars. Because of the much reduced volume required for storage and the insignificant differences in regeneration interval, conservation of shelled seeds would be highly cost-effective under the controlled environmental conditions, as compared to in-shell seeds. Since storage at very low moisture contents was suggested as a simple and low cost option for conservation of seed lots required for short-term use, the longevity of peanut seeds (cv. ICGS 76) hermetically sealed with 3.6% moisture content was studied in comparison with seeds held at 5.8% moisture. The studies showed that peanut seeds hermetically stored at room temperature (23-25 C) with low moisture content (below 4%) could retain high germination (> 85%) for up to 8 yr.

Item Type: Article
Author Affiliation: Genetic Resources Unit, International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), Patancheru 502 324, Andhra Pradesh, India
Subjects: Crop Improvement
Crop Improvement > Seed Technology
Divisions: Groundnut
Depositing User: Mr B Krishnamurthy
Date Deposited: 23 Feb 2011 17:24
Last Modified: 23 Feb 2011 17:24
Official URL: http://www.peanutscience.com/doi/pdf/10.3146/pnut....
URI: http://eprints.icrisat.ac.in/id/eprint/1552

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