| Autor: |
Whitehouse KJ; 1 T.T. Chang Genetic Resources Center, International Rice Research Institute , Los Baños, Philippines ., Owoborode OF; 2 Department of Agronomy, University of Ibadan , Ibadan, Nigeria ., Adebayo OO; 2 Department of Agronomy, University of Ibadan , Ibadan, Nigeria ., Oyatomi OA; 3 Genetic Resources Center, International Institute of Tropical Agriculture , Ibadan, Nigeria ., Olaniyan AB; 2 Department of Agronomy, University of Ibadan , Ibadan, Nigeria ., Abberton MT; 3 Genetic Resources Center, International Institute of Tropical Agriculture , Ibadan, Nigeria ., Hay FR; 1 T.T. Chang Genetic Resources Center, International Rice Research Institute , Los Baños, Philippines . |
| Jazyk: |
angličtina |
| Zdroj: |
Biopreservation and biobanking [Biopreserv Biobank] 2018 Oct; Vol. 16 (5), pp. 327-336. |
| DOI: |
10.1089/bio.2018.0026 |
| Abstrakt: |
Maximizing seed longevity is important for genebanks to efficiently manage their accessions, reducing the frequency of costly regeneration cycles and the loss of genetic integrity. Research on rice seeds has shown that subsequent longevity in air-dry storage can be improved by drying seeds, which are metabolically active at harvest (moisture contents above a critical value close to 16.5%), for an initial period at a higher temperature (40°C-60°C) than that currently recommended by the current genebank standards (5°C-20°C). The aim of this study was to test whether similar benefits could be achieved in two legume species-cowpea and soya bean-by drying freshly harvested seeds, from two separate harvests, at 40°C and 35% relative humidity, for up to 8 days before equilibrium drying in a drying room (17°C and 15% relative humidity). Improvements in longevity were observed in three of the four accessions of soya bean, with the greatest improvement generally occurring after the maximum duration (8 days) at the higher temperature. However, of the five accessions of cowpea, only seeds of TVu-9698 and TVu-13209 from the first harvest, and of TVu-13193 from the second harvest, showed an improvement in longevity compared with drying following the standard protocol. A negative effect of high-temperature drying was also observed in one accession of cowpea, TVu-11980, but only in seeds harvested later in the season, 13 weeks after planting. This research not only provides evidence of the potential benefits of drying orthodox seeds at an alternative, higher, temperature instead of at the conventional lower temperature, before long-term storage, but also raises awareness of how genebanks can improve the management of their accessions. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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