不同海拔下水稻正反交 F2群体的孕穗期耐冷性研究

来源 :云南农业大学学报:自然科学版 | 被引量 : 0次 | 上传用户:hellen
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云南高寒稻区的地方粳稻品种小麻谷与籼稻细胞质的改良品系南 34的正反交 F1分别种植于海拔 400,1860和 2200m的 3个点,对 6个 F2群体的孕穗期耐冷性进行分析。结果表明小穗育性是对低温最敏感的性状,可用作孕穗期耐冷性的评价指标。F2(小麻谷 ×南 34)群体的平均孕穗期耐冷性均极显著高于同一海拔下产生的反交 F2群体的表现 (P<001)。同一组合在2200m海拔产生的 F2群体平均孕穗期耐冷性均高于其余两海拔产生的群体,其中显著 (P<005)或极显著 (P<001)高于
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