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tube culture (細菌的)試管培養。

tube foot

China had initially formed a preservation system for germ plasma resources from crops , including one national germ plasma bank for long - term preservation and a duplicate one , 23 local germ plasma banks for mid - term preservation , and 25 national germ plasma nurseries , of which two are for test - tube culture 到1995年底,中國已初步形成農作物種質資源保存體系,建成國家級貯存種子長期庫及復份庫各1座,地方中期庫23座,國家級田間種質圃25個,其中試管苗圃種質庫2個。