室内冷冻法鉴定小麦抗寒性的研究
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国家重点研发计划项目“黄淮冬麦区北片高产优质节水小麦新品种培育(2017YFD0100600);河北省科技支撑计划项目“冬小麦种质资源与育种技术创新”(16226320D)


Identification of Cold Resistance Wheat Varieties by Laboratory Freezing Method
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The National Key Research and Development Program of China; Technology Innovation of Winter Wheat of Science and Technology Planning Project of Hebei province.

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    摘要:

    冬季冻害是制约我国北方小麦生产的重要因素之一,田间鉴定小麦抗寒性方法易受环境影响。本研究以209份抗寒性存在显著差异的小麦种质资源为材料,进行人工冷冻处理,测定不同冷冻温度处理下植株电导率及冷冻成活率,分析相对电导率、冷冻成活率和半致死温度与田间冻害等级的相关性,以建立室内鉴定小麦抗寒性的最适方法,为小麦抗寒性育种提供优良品种资源。结果表明,-14℃处理3h后的冷冻成活率与冻害等级呈显著负相关,该方法可快速、准确鉴定小麦不同品种抗寒性,同时鉴定出河农05(9)7-11-4-15、冀麦585、乐639、石麦15、保5108、石新828、众麦1号和河农7069等抗寒性较强品种。

    Abstract:

    Winter freezing seriously threatens the yield stability of common wheat in the north area of China. Test for freezing resistance under the field condition largely depended on the environmental climate. By taking use of artificial freezing, we investigated the relative conductivity and freezing survival rate of the plants under different freezing treatments in 209 wheat varieties, with a purpose of obtaining excellent variety resources for cold resistance breeding of wheat. Furthermore, we analyzed the correlation of relative conductivity, freezing survival rate and lethal temperature with field frost damage grade. The results showed a significant negative correlation between the freezing survival rate and freezing injury level after treatment for 3h at -14°C (correlation coefficient = -0.427). By cold treatment under different temperatures, we found the optimal temperature condition that could be used to identify the cold resistance at seedling stage. As a result, several cold resistance varieties such as Henong 05 (9) 7-11-4-15, Jimai 585, Le 639, Shimai 15, Bao 5108, Shixin 828, Zhongmai 1 and Henong 7069 were obtained.

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赵瑞玲,赵勇,徐渴,等.室内冷冻法鉴定小麦抗寒性的研究[J].植物遗传资源学报,2019,20(2):284-296.

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  • 收稿日期:2018-07-19
  • 最后修改日期:2018-08-17
  • 录用日期:2018-08-29
  • 在线发布日期: 2019-03-19
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