稻种资源低温贮藏生活力跟踪监测与种质更新（英文）

53 rice germplasm resources warehoused during 1981-1984 were regarded as materials to monitor the viability at warehouse time and different years after warehoused.The results showed that seed germination rates of different rice germplasm resources assumed descending trend in storage,with annual decreasing rate between 0.12%-3.05%;the seed germination rates of most cultivars were above 75% after stored for 26 years;forecasting analysis based on the germination rate of 75% as reference showed a huge difference of safe storage life for different rice germplasm resources,ranging from 12 to 50 years,even longer time.The results suggest that track monitoring on viability and regeneration of rice cultivars is of great importance for germplasm resources conservation.

Track Monitoring on Viability of Rice Germplasm Resources and Regeneration under Low Temperature Storage

53 rice germplasm resources warehoused during 1981-1984 were regarded as materials to monitor the viability at warehouse time and different years after warehoused.The results showed that seed germination rates of different rice germplasm resources assumed descending trend in storage,with annual decreasing rate between 0.12%-3.05%;the seed germination rates of most cultivars were above 75% after stored for 26 years;forecasting analysis based on the germination rate of 75% as reference showed a huge difference of safe storage life for different rice germplasm resources,ranging from 12 to 50 years,even longer time.The results suggest that track monitoring on viability and regeneration of rice cultivars is of great importance for germplasm resources conservation.