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中国作物种质资源安全保存理论与实践
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  • 英文篇名:Theory and Practice of the Safe Conservation of Crop Germplasm Resources in China
  • 作者:卢新雄 ; 辛霞 ; 尹广鹍 ; 张金梅 ; 陈晓玲 ; 王述民 ; 方沩 ; 何娟娟
  • 英文作者:LU Xin-xiong;XIN Xia;YIN Guang-kun;ZHANG Jin-mei;CHEN Xiao-ling;WANG Shu-min;FANG Wei;HE Juan-juan;Institute of Crop Sciences,Chinese Academy of Agricultural Sciences;
  • 关键词:作物种质资源 ; 安全保存 ; 遗传完整性 ; 监测预警技术 ; 繁殖更新 ; 超低温保存
  • 英文关键词:crop germplasm resources;;safe conservation;;critical node;;genetic integrity;;monitor and early warning technique;;cryopreservation
  • 中文刊名:ZWYC
  • 英文刊名:Journal of Plant Genetic Resources
  • 机构:中国农业科学院作物科学研究所;
  • 出版日期:2018-09-12 16:30
  • 出版单位:植物遗传资源学报
  • 年:2019
  • 期:v.20
  • 基金:国家科技支撑计划(2013BAD01B01);; 农业部作物种质资源保护与利用项目(2130135);; 国家自然科学基金(31371713)~~
  • 语种:中文;
  • 页:ZWYC201901001
  • 页数:10
  • CN:01
  • ISSN:11-4996/S
  • 分类号:5-14
摘要
我国是作物种质资源大国,目前已经收集保存了340种作物,保存资源总量达50万份,如何确保安全保存是种质资源管理的首要课题。自"九五"以来,系统地开展了作物种质资源安全保存理论与技术的研究,揭示了种质活力丧失存在关键节点及其生物学机制;明确了发芽率低于关键节点后进行更新,会导致群体遗传完整性降低;提出了种质安全保存寿命的概念,以及延长安全保存寿命的关键因素。研发了种质活力监测预警、繁殖更新与离体保存等关键技术,制定了种质资源入库圃保存、监测预警、繁殖更新、离体保存和设施建设等技术规程,创建了中国作物种质资源安全保存技术体系。该体系应用于全国作物种质资源的保存实践,最大程度延长种质安全保存寿命,并监测预警出需更新的种质,避免因活力和遗传完整性丧失而导致种质资源得而复失,为实现我国作物种质资源长久安全保存提供了有力保障。
        China has abundant crop germplasm resources,and has preserved over 500000 accessions of 340 crops.Ensuring the safe conservation of germplasm resources is therefore of high priority for genebank managers.Since the 9th Five-Year Plan,the National Crop Genebank of China has systematically studied the theories and technologies of the safe conservation of germplasm.For the first time,we proposed a theory for germplasm resources conservation,including both safety backup and the biological mechanism of conservation.The transition from platform(high viability)to the rapid reduction phase of the seed survival curve was defined as the critical node(CN).It was revealed that oxidative damage and mitochondrial damage disordered the metabolism during the CN.In addition,germplasm would loss genetic integrity,if regenerated when its germination rate was lower than the CN.Taking loss of viability and genetic integrity together,germplasm longevity is defined as the time taking by seed viability declined to the CN.We have made breakthroughs on the key techniques for seed viability monitoring,early warning of viability decline,regeneration,in vitro conservation and cryopreservation.Based on the above research,we have created systematic technologies for the safe conservation of crop germplasm resources,which have been applied national-widely.To avoid the loss of viability and genetic integrity in genebank,the systematic technologies would prolong the germplasm longevity,monitor and forecast seed viability,recognize the germplasm which needs regeneration.Therefore,the systematic technologies provide reliable guarantee for the safe conservation of crop germplasm resources.
引文
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