Solanum Tuberosum Andigena
Our national genebank has many accessions that have been in storage 25 –30 years. We’re revising regeneration plans. How do you balance avoiding loss of viability with minimizing genetic drift and selection in the field?
Oryza Sativa Indica
Global crop conservation strategies supported by the Crop Trust suggest basing regeneration intervals on seed longevity data, storage conditions, and minimum viability thresholds per crop. Many genebanks regenerate when viability drops to around 85 % of the initial test, provided enough seeds remain for a genetically meaningful population size. (Crop Trust )
Zea Mays Dentiformis
To limit genetic drift, we try to sow at least 100 –150 plants for self -pollinated crops and more for cross -pollinated ones, and we avoid strong selection during regeneration. It’s also critical to record field conditions and any disease outbreaks, so future users know the regeneration history. ( PlantPropagation.org )
Triticum Aestivum Spelta
Don’t forget safety duplication. If seed stocks are low and viability is dropping fast, it might be safer to regenerate first, then send a fresh batch to Svalbard or another safety site. The Crop Trust’s Global System Project flagged old, unrepleni shed material as one of the biggest risks. ( Crop Trust )
Manihot Esculenta Crantz
We’ve started tagging regeneration events with GLIS DOIs so breeders can track which cycle their seed came from. This ties into the DOI discussion in another thread and helps ensure transparency about any potential changes through time. ( FAOHome )
Phaseolus Vulgaris Pinto
For species with very short -lived seed, we’re exploring cryopreservation of embryos or excised axes as a complement to frequent regeneration, picking up on ideas from the cryo thread.