藜麦种子对萌发温度的响应及低温胁迫萌发能力鉴定  

Response of quinoa seeds to germination temperatureand identification of germination ability under low temperature stress

作　　者：姚庆 阿里别里根·哈孜太 杨明花 李强[2] 苗昊翠[2] 崔宏亮 YAO Qing;Aribelegan Hazzetti;YANG Minghua;LI Qiang;MIAO Haocui;CUI Hongliang(Agricultural Sciences Institute of Ili Prefecture,Xinjiang,Yining Xinjiang 835000,China;Institute of Economical Crops,Xinjiang Academy of Agricultural Sciences,Urumqi 830091,China)

机构地区：[1]新疆伊犁州农业科学研究所,新疆伊宁835000 [2]新疆农业科学院经济作物研究所,乌鲁木齐830091

出　　处：《新疆农业科学》2023年第5期1141-1149,共9页Xinjiang Agricultural Sciences

基　　金：新疆维吾尔自治区自然科学基金项目“藜麦苗期低温胁迫的生理响应及旱作冷凉区适应性研究”(2020D01B54)~。

摘　　要：【目的】研究藜麦萌发期对低温胁迫的响应,采用多个萌发指标综合评价其耐低温特性,分析不同藜麦品种在不同萌发温度下的生理特性,为生产上藜麦适期播种提供理论依据。【方法】以新疆伊犁河谷种植适应性较好的6个藜麦品种为材料,于1、5、10、15和20℃的培养箱中进行发芽试验,测定不同温度下各藜麦品种的发芽势、发芽率、发芽指数、活力指数、芽长、芽鲜重等指标,根据不同指标的差异性,采用相对萌发指标相关性、主成分、隶属函数分析等方法,综合评价6个藜麦品种在不同温度条件下耐低温能力。【结果】随着温度降低,所有萌发指标值都随之降低,且不同藜麦品种在不同温度下各萌发指标差异显著,6个萌发指标的相对值之间也存在一定的相关性,因子1的特征值为4.855,占总信息量的80.924%,其他主成分因子特征值均小于1,相对发芽势、相对发芽指数、相对活力指数可作为藜麦萌发期耐低温特性的主要鉴定指标。【结论】YN1、YN3品种在萌发期对低温最敏感,不适合早播;YN2、YN5、YN6品种在不同温度下指标表现稳定,在低温条件下虽然发芽速度较慢,但是发芽率较高,耐低温性较强,属于耐低温品种;YN4品种在低温条件下表现最突出,属于极耐低温品种。【Objective】To study the response of quinoa at germination stage to low temperature stress,to evaluate its low temperature tolerance by using multiple germination indexes,and to analyze the physiological characteristics of different quinoa varieties at different germination temperatures,so as to provide theoretical basis for planting quinoa at suitable germination stage in production.【Methods】6 quinoa varieties with good adaptability in Yili River Valley of Xinjiang were taken as test materials and the germination test was performed in 1℃,5℃,10℃,15℃and 20℃incubators to measure the germination potential,germination rate,germination index,vigor index,bud length and bud fresh weight of each quinoa variety at different temperatures,and the six quinoa varieties were comprehensively evaluated under different temperature conditions by means of difference analysis of different indexes,correlation analysis of relative germination indexes,principal component analysis and membership function analysis.【Results】With the decrease of temperature,the values of all germination indexes decreased,and there were significant differences among different quinoa varieties under different temperatures,and there was a certain correlation between the relative values of the six germination indexes.The characteristic value of factor 1 was 4.855,accounting for 80.924%of the total information.The characteristic values of other principal component factors were all less than 1,so the relative germination potential,relative germination index and relative vigor index could be used as the main identification indexes of low temperature tolerance of quinoa during germination stage.【Conclusion】YN 1 and YN 3 varieties are the most sensitive to low temperature at germination stage,and not suitable for early sowing.Varieties YN 2,YN 5 and YN 6 show stable performance in all aspects under different temperatures.Although their germination speed are slower at low temperature,but the germination rate are high and the low temperature

关 键 词：藜麦 萌发指标 温度 综合评价 

分 类 号：S51[农业科学—作物学]