花生种子萌发吸胀阶段冷害抗性的 鉴定及耐冷种质的筛选
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福建省农业科学院作物研究所 / 农业部作物基因资源与种质创新福建科学观测实验站 / 福建省 特色旱作物品种选育工程技术研究中心 / 福建省作物分子育种工程实验室,福州 350013

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福建省科技计划项目——省属公益类科研院所基本科研专项(2019R1031-12,2017R1026-7);福建省财政专项——福建省农 科院科技创新团队建设项目(STIT2017-2-6);福建省农业科学院博士基金(DC2018-3);福建农业科学院作物研究所博士基金 (QN2018-2);福建省农业科学院对外合作项目(DEC201916);福建省农业科学院一般性引导项目(AC2017-20)


Identification of Imbibitional Chilling Injury Resistance for Peanut and Screening of Imbibitional Chilling-tolerance Germplasm
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Institute of Crop Sciences,Fujian Academy of Agricultural Sciences/Fujian Research Station of Crop Gene Resource & Germplasm Enhancement,Ministry of Agriculture and Rural Affairs/Fujian Engineering Research Center for Characteristic Upland Crops Breeding/Fujian Engineering Laboratory of Crop Molecular Breeding,Fuzhou 350013

Fund Project:

Basic Scientific Research Special Project for Fujian Provincial Public Research Institutes(2019R1031-12, 2017R1026-7),Fujian Provincial Financial Special Project:Science and Technology Innovative Team in Fujian Academy of Agricultural Sciences(STIT2017-2-6),Doctoral Foundation of Fujian Academy of Agricultural Sciences(DC2018- 3),Doctoral Foundation of Institute of Crop Science(QN2018-2 ),Foreign Cooperation Projects for Fujian Academy of Agricultural Sciences(DEC201916)General Guidance Project for Fujian Academy of Agricultural Sciences(AC2017-20)

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    摘要:

    为更好的评价花生吸胀冷害抗性,本研究首先分析了常温条件下(25 ℃)和冷胁迫条件下(2 ℃)花生种子萌发过 程中的吸水状况,结果表明不同基因型的花生吸胀阶段的持续时间基本一致,维持在浸种后 0~12 h;冷胁迫能够使吸胀阶段 初期的吸水速度显著下降,但对吸胀阶段的持续时间没有显著影响。对种子萌发 3 个生理阶段(吸胀、萌动、萌发阶段)分别 进行冷害胁迫处理,结果表明吸胀阶段遭受的冷害胁迫对花生种子萌发影响较其他阶段严重。进一步的试验表明,吸胀阶段 种子 2 ℃冷胁迫 12 h,能够更好地区分不同花生种质之间吸胀冷害抗性的差异,从而建立了花生种子吸胀冷害抗性的鉴定体 系。利用该鉴定体系对 64 份花生种质的吸胀冷害抗性进行鉴定,以相对发芽率 85% 为阈值,筛选出了 7 份耐冷种质。本研 究为花生耐冷育种及吸胀冷害抗性机制解析提供了技术鉴定体系和材料基础。

    Abstract:

    In order to better evaluate the imbibitional chilling injury resistance of peanut,we analyzed the water-uptake conditions during peanut germination under the normal temperature(25 ℃)and chilling treatment (2 ℃),respectively. The result revealed that the duration time for the imbibitional stage of peanut germination among different peanut genotype was consistent,lasting from 0-12 h after seed soaking. The chilling stress was found to slow down the speed of water-uptake at the early phase of imbibition stage;however,on visible difference on duration time was observed. The imbibitional chilling injury was found to be much more serious than chilling injury occurred at other stages during peanut germination. By further evaluating the effect of temperature and duration of imbibitional chilling injury on the germination rate,the results showed that 2 ℃ /12 h was the most optimal condition to identify the imbibitional chilling injury resistance. By taking use of this method,sixtyfour peanut accessions were evaluated for their imbibitional chilling injury resistance. Seven accessions showed the relative germination rate over 85% under the imbibitional chilling stress,and they were considered as chillingtolerance accessions. Taken together,this study provided useful information for breeding new peanut varieties with chilling-tolerance and also for unlocking the mechanism for chilling response of peanut during imbibition.

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陈昊,徐日荣,陈湘瑜,等.花生种子萌发吸胀阶段冷害抗性的 鉴定及耐冷种质的筛选[J].植物遗传资源学报,2020,21(1):192-200.

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  • 收稿日期:2019-10-31
  • 最后修改日期:2019-11-19
  • 录用日期:2019-11-07
  • 在线发布日期: 2020-01-17
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