【摘要】 本文是系列论文水稻耐冷性研究的第二部分 ,从云南稻种资源芽期耐冷性鉴定、苗期耐冷性鉴定、孕穗开花期耐冷性鉴定3个方面系统地阐述了研究结果。早红谷、紫糯、攀农 1号、马登红谷、澜沧花糯、攀天阁黑谷、宁蒗托托谷和海排谷等是芽期强耐冷性资源 ,芽期耐冷性存在稻种类型间差异。黑选 5号、马登红谷、鲁甸黑谷、龙树红谷、七河大红谷、凤仪小白谷、小白谷、背子糯和细黄糯等是苗期耐冷性极强资源。黑选 5号、海排谷、勐谢早红谷、石屏冷水谷、丽江新团黑谷、永宁小灰谷、昆明小白谷、半节芒、合系 10号和云冷 3 2等是孕穗开花期耐冷性资源。马登红谷等具有芽期和苗期耐冷性 ,澜沧花糯和攀天阁黑谷等具有芽期和孕穗开花期耐冷性 ,凤仪小白谷和龙树红谷等资源具有苗期和孕穗开花期耐冷性更多还原

【Abstract】 Here is the second part of a series of papers to describe the studies on cold tolerance of rice This part described the results of evaluation on cold tolerance of Yunnan rice genetic resources at three different stages Zaohonggu,Zinuo,Pannong No 1,Madenghonggu,Lancanghuanuo,Pantiangeheigu,Ninglang Tuotuogu and Haipaigu performed strong cold tolerance at budding stage The cold tolerance at budding stage differed among groups Heixuan No 5,Madenghonggu,Ludianheigu,Longshuhonggu,Qihedahonggu,Fenyixiaobaigu,Xiaobaigu,Beizinuo,Xihuangnuo,Heixuan No 5 and Madenghonggu performed strong cold tolerance at seedling stage Heixuan No 5,Haipaigu,Mengxiezaohonggu,Shipinglengshuigu,Lijiangxintuanheigu,Yongninxiaohuigu,Kunmingxiaobaigu,Banjiemang,Hexi No 10 and Yunleng No 3 2 performed strong cold tolerance at reproductive stage,Madenghonggu was tolerant to cold at both budding and seedling stages,Lancanghuanuo and Pantiangeheigu were tolerant to cold at both budding and reproductive stages and Fengyixiaobaigu and Longshuhonggu were tolerant to cold at both seedling and reproductive stages更多还原