水稻种质资源芽期耐冷性的鉴定与评价

Characterization and Evaluation for Cold Tolerance at the Budburst Period of Rice Germplasm

对新收集的 879份水稻种质资源进行了水稻芽期耐冷性的鉴定与评价 ,从中筛选出芽期耐冷性极强的水稻种质资源 39份 ,均为贵州地方粳稻品种。供试粳稻品种 6 1 2 3%具有强芽期耐冷性 (3级 ) ,而籼稻品种只有 13 77%具有强芽期耐冷性 (3级 ) ,粳稻品种的芽期耐冷性显著强于籼稻品种。无论籼稻 ,还是粳稻 ,贵州地方稻种的芽期耐冷性显著强于来自其他地区的品种 ,从贵州地方稻种中挖掘极强耐冷种质资源的潜力较大。

Cold tolerance at the budburst period (CTBP) for 879 accession of rice were evaluated. The 39 rice varieties with very strong CTBP (grade 1) were selected, and all of which were traditional japonica rice from Guizhou province. 61 23% of evaluated japonica rice varieties have strong CTBP (grade 3), while 13 77% of evaluated indica rice varieties have strong CTBP (grade 3). CTBP of japonica rice was significantly stronger than indica rice. The CTBP of landraces from Guizhou province, either indica rice or japonica rice was significantly stronger than rice varieties from other areas. It is of larger potential to select excellent varieties with very strong cold tolerance.