Define seed sampling. Explain various factors affecting seed storage. Add a note on need of seed storage.
Answers
If there is any evidence of heterogeneity test of the primary samples drawn, as defined by ISTA rules, further sampling and testing from the seed lot should not be continued. Seed lot: Seed lot is a specified quantity of the seed of one cultivar of known origin as physically identifiable.
Factors that affect seed quality in storage include duration of storage, temperature in storage structure, seed moisture and the relative humidity in the storage structure, oxygen pressure during storage and pests and diseases . These factors vary with the type of storage method used.
The conditions which prolong viability during storage have been well defined for seeds which are tolerant of desiccation. Storage conditions have been recommended by the IBPGR Advisory Committee on Seed Storage. For base collections, seeds of between 3-7 % moisture content should be stored in sealed containers.
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