水稻品种耐冷性鉴定

IDENTIFICATION OF COLD TOLERANT RICE VARIETIES

根据水稻不同品种耐冷性有较大差异的特点,本文应用人工气候箱模拟自然低温对国内外465份水稻品种进行鉴定分析,结果从中筛选出减数分裂期、开花期和灌浆结实期耐冷性强度达Ⅰ级的品种分别为18份、11份和4份;耐冷性强发达Ⅱ级的品种分别为83份、41份和7份。不仅为水稻耐冷育种的资源选择提供了重要参考资料,而且为一部分耐冷性较强的品种在生产上推广应用提供了可靠的科学依据。

It is known that different rice varietes differ substantially in cold tole- rence. The auther has determined the cold tolerance of 465 rice varieties both from home and abroad by use of psychrometric chamber.The results were summarized as follows. 33 varieties showed cold tolerance of first scale,including 18 varieties tolerant to cold at meiophase,11 varieties at blooming stage and 4 varicties at filling stage.131 varictics showed cold tolerance of second scale,including 83 varieties tolarant to cold at meiophase,41 varieties at blooming stage and 7 varieties at filling stage. These results will serve as important references useful to rice breeding for cold tolerance and provide scientific basis for the farm extension of some cold tolerant rice varieties idntified.