Seeds vigor of rice and wheat germplasm conserved for 10 years at difference initial germination percentage in Yunnan

Germination percentage of 278 accessions rice and 153 accessions wheat germplasm conserved for 10 years at Yunnan Crops Germplasm Low Temperature Metaphase Storeroom(YCGLTMS)were tested.Mean vigor of seed from all tested material,species and origin ecozones planted at different initial germination percentage were analyzed.The result indicated that mean vigor decrease of rice and wheat tested were very significant,but vigor of 34.5% rice and 26.8% wheat rose;that difference of vigor decreased among different species including subspecies,ecotype variety form and origin of ecozones as well as the level of initial germination percentage were very significant;that vigor rising in partial materials tested was mostly due to their heritable characters,eg.dormancy and storability etc.Storability of rice germplasm form hsien-keng interleaving district and wheat germplasm form early or middle-early ripening wheat districts were easy to store.