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为探究马铃薯(Solanum tuberosum)不同遗传特性与其对水分胁迫响应之间的相关关系,本研究通过SSR分析了供试材料的遗传多样性,并通过PEG-6000和不浇水胁迫处理马铃薯移栽苗的方法,研究了干旱胁迫下不同马铃薯品种中过氧化物酶(POD、CAT)活性及可溶性蛋白含量的变化。结果显示,在遗传相似系数(GS)为0.700水平上,44份马铃薯材料可被聚为5类,大部分品种聚在一起,说明供试品种的遗传基础相对狭窄。通过GGE-Biplot综合分析POD、CAT及可溶性蛋白质变化量,将44份供试材料分为6组。比对分析遗传多样性分析与生理结果,发现二者之间并不具有明显的一致性,即品种遗传特性的差异并不能直接反映品种的抗旱性能差异,而两种胁迫方式在研究品种抗旱特性上具有较高的一致性。该研究结果可以为今后抗旱试验的进行提供参考。
In order to explore the correlation between different genetic traits of Solanum tuberosum and its response to water stress, the genetic diversity of the tested materials was analyzed by SSR in this study. Potato transplanting seedlings were treated with PEG-6000 and non-watering stress , The changes of peroxidase (POD, CAT) and soluble protein contents in different potato varieties under drought stress were studied. The results showed that at the genetic similarity coefficient (GS) of 0.700, 44 potato cultivars could be grouped into 5 categories, most of which were clustered together, indicating that the genetic basis of the tested cultivars was relatively narrow. By analyzing the changes of POD, CAT and soluble protein by GGE-Biplot, 44 samples were divided into 6 groups. Comparative analysis of genetic diversity and physiological results showed that there was no obvious consistency between them, that is, the difference of genetic characteristics did not directly reflect the differences in drought resistance of the cultivars. However, On the higher consistency. The results of this study can provide a reference for the future drought resistance test.