种质库种质安全保存理论研究的进展与展望

doi:10.3864/j.issn.0578-1752.2022.07.001

Abstract

Abstract:

The safe conservation of germplasm resources is the core of high-level protection and a prerequisite for sustainable utilization. Low-temperature genebank is the most important way to conserve crop germplasm resources. These aims, extending the conservation longevity, maintaining the genetic integrity and preventing the accidental loss, always were the research difficulties and hotspots in the safe conservation. This review systematically sorted out the research history of germplasm resources in genebanks in the past 100 years, and pointed out: (1) Low moisture content and low storage temperature are key factors for prolonging seed longevity, forming the low temperature and moisture theory, which is the theoretical basis for safe conservation in genebanks; (2) The declining viability of seeds in genebanks has the characteristic of the critical node, which is the lower limit for maintaining genetic integrity, forming the critical node theory, which is the theoretical basis for the safe conservation of germplasm resources; (3) The conserved germplasm should be backed up by the physical space or storage method, forming the back up conservation mechanism, which is the a safeguard measure to prevent the irreversible loss of resources caused by accidents. This review focused on the connotation, significance and practical guidance of the double-low theory, the critical node theory and the duplication conservation mechanism, in order to further promoting the development of the safe conservation of germplasm resources.

Key words: genebank, safe conservation, low temperature and moisture theory, critical node theory, back up conservation mechanism

YIN GuangKun,XIN Xia,ZHANG JinMei,CHEN XiaoLing,LIU YunXia,HE JuanJuan,HUANG XueQi,LU XinXiong. The Progress and Prospects of the Theoretical Research on the Safe Conservation of Germplasm Resources in Genebank[J].Scientia Agricultura Sinica, 2022, 55(7): 1263-1270.

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References 52

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