Andersone-Ozola Una, Jēkabsone Astra, Purmale Līva, Romanovs Māris, Ievinsh Gederts
Department of Plant Physiology, Faculty of Biology, University of Latvia, 1 Jelgavas Str., LV-1004 Rīga, Latvia.
Plants (Basel). 2021 Jul 28;10(8):1552. doi: 10.3390/plants10081552.
Crop wild relatives are valuable as a genetic resource to develop new crop cultivars, better adapted to increasing environmental heterogeneity and being able to give high quality yields in a changing climate. The aim of the study was to evaluate the tolerance of different accessions of a crop wild relative, L., from coastal habitats of the Baltic Sea to three abiotic factors (increased soil moisture, trampling, cutting) in controlled conditions. Seeds from four accessions of collected in the wild, were used for experiments, and cv. 'Palestine' was used as a reference genotype. Plants were cultivated in asymbiotic conditions of soil culture. Treatments were performed in a quantifiable way, with three gradations for soil moisture (optimum, waterlogged, flooded) and four gradations for both trampling and cutting. All accessions had relatively high tolerance against increased soil moisture, trampling, and cutting, but significant accession-specific differences in tolerance to individual factors were clearly evident, indicating that the studied wild accessions represented different ecotypes of the species. Several wild accessions of showed stress tolerance-related features superior to these of cv. 'Palestine', but TF1 was the most tolerant accession, with a very high score against both waterlogging and cutting, and a high score against trampling.
作物野生近缘种作为一种遗传资源，对于培育新的作物品种具有重要价值，这些新品种能更好地适应日益增加的环境异质性，并在气候变化的情况下实现高质量产量。本研究的目的是在可控条件下，评估一种来自波罗的海沿岸栖息地的作物野生近缘种L. 的不同种质对三种非生物因素（土壤湿度增加、践踏、切割）的耐受性。从野外收集的四个L. 种质的种子用于实验，并将品种‘巴勒斯坦’用作参考基因型。植物在土壤培养的非共生条件下培育。处理以可量化的方式进行，土壤湿度有三个等级（最佳、涝渍、水淹），践踏和切割均有四个等级。所有种质对土壤湿度增加、践踏和切割都具有较高的耐受性，但对各个因素的耐受性存在明显的种质特异性差异，这表明所研究的野生种质代表了该物种的不同生态型。几个L. 的野生种质表现出优于品种‘巴勒斯坦’的与胁迫耐受性相关的特征，但TF1是耐受性最强的种质，在耐涝和耐切割方面得分非常高，在耐践踏方面得分也很高。
