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当前位置: 首页 > 文章 > 中国杂草稻种群的发芽期耐冷性研究 植物遗传资源学报 2017,18 (1) 1-9
Position: Home > Articles > Cold Tolerance of Seed Germination for Weedy Rice Populations in China Journal of Plant Genetic Resources 2017,18 (1) 1-9

中国杂草稻种群的发芽期耐冷性研究

作  者：
杨金玲;强胜;张帮华;宋小玲;石志华;蒋倩;戴伟民
单  位：
南京农业大学杂草研究室
关键词：
杂草稻;水稻;种子萌发率;耐冷性
摘  要：
以中国75个杂草稻种群及其对应采样田的水稻品种为试验材料,研究了不同处理(破除休眠与不破除休眠、常温25℃与低温15℃、7 d测定和14 d测定)对种子发芽率的影响。结果表明,杂草稻的发芽率与对应采样点水稻品种的发芽率呈现极显著相关性。杂草稻破除休眠处理的发芽率显著或极显著高于不破除休眠处理。破除休眠与不破除休眠下,15℃处理的杂草稻种子发芽率均显著高于对应采样田的水稻品种,证明杂草稻相对于采样田水稻品种具有更强的耐冷性,可能进化出了新的耐冷性机制。25℃处理下杂草稻和对应水稻品种的发芽率均与纬度呈显著或极显著负相关,表明休眠性有随着纬度的降低而减弱的趋势。
译  名：
Cold Tolerance of Seed Germination for Weedy Rice Populations in China
作  者：
YANG Jin-ling;QIANG Sheng;ZHANG Bang-hua;SONG Xiao-ling;SHI Zhi-hua;JIANG Qian;DAI Wei-min;Weed Research Laboratory,Nanjing Agricultural University;
关键词：
weedy rice;;rice;;seed germination ratio;;cold tolerance
摘  要：
75 weedy rice populations and their coexisting cultivars of rice were collected.Seed germination was processed under 8 different treatments including with or without breaking dormancy,normal temperature(25 ℃) or low temperature(15 ℃),7 days or 14 days,respectively.The results showed at germination ratio of weedy rice had extremely significant correlation with that of their coexisting cultivars without or with breaking dormancy.Germination ratio of weedy rice with breaking dormancy was significantly or extremely significantly higher than that of weedy rice without breaking dormancy.Without or with breaking dormancy,cold tolerance of weedy rice was stronger than that of coexisting cultivars,which indicated weedy rice might had evolved a novel mechanism of cold tolerance at 15℃.Furthermore,germination ratio of weedy rice and their coexisting cultivars at 25 ℃ had negative correlation with latitude,which showed weaker dormancy with decreasing latitude.

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