Arif Mian Abdur Rehman, Nagel Manuela, Lohwasser Ulrike, Borner Andreas
Leibniz Institute of Plant Genetics and Crop Plant Research, Gatersleben, Germany.
J Biosci. 2017 Mar;42(1):81-89. doi: 10.1007/s12038-016-9661-6.
The deterioration in the quality of ex situ conserved seed over time reflects a combination of both physical and chemical changes. Intraspecific variation for longevity is, at least in part, under genetic control. Here, the grain of 183 bread wheat accessions maintained under low-temperature storage at the IPK-Gatersleben genebank over some decades have been tested for their viability, along with that of fresh grain subjected to two standard artificial ageing procedures. A phenotype-genotype association analysis, conducted to reveal the genetic basis of the observed variation between accessions, implicated many regions of the genome, underling the genetic complexity of the trait. Some, but not all, of these regions were associated with variation for both natural and experimental ageing, implying some non-congruency obtains between these two forms of testing for longevity. The genes underlying longevity appear to be independent of known genes determining dormancy and pre-harvest sprouting.
随着时间的推移，异地保存种子的质量下降反映了物理和化学变化的综合影响。种内寿命变异至少部分受遗传控制。在这里，对保存在IPK-格特斯莱本基因库中几十年的183份面包小麦种质的种子进行了活力测试，同时对新鲜种子进行了两种标准人工老化处理后的活力也进行了测试。进行了表型-基因型关联分析以揭示种质间观察到的变异的遗传基础，该分析涉及基因组的许多区域，突显了该性状的遗传复杂性。这些区域中的一些（但不是全部）与自然老化和实验老化的变异都相关，这意味着这两种寿命测试形式之间存在一些不一致性。长寿相关基因似乎独立于已知的决定休眠和收获前发芽的基因。
