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首页> 外文期刊>Genetic Resources and Crop Evolution >Genetic variation in garden cress (Lepidium sativum L.) germplasm as assessed by some morphological traits
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Genetic variation in garden cress (Lepidium sativum L.) germplasm as assessed by some morphological traits

机译：通过一些形态学特征评估了水芹种质资源的遗传变异

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摘要

The morphological variation of 81 garden cress including 77 accessions of Genebank Department of Leibniz Institute of Plant Genetics and Crop Plant Research in Gatersleben, Germany and four ancient varieties collected from different geographical and bioclimatic areas of Iran were assessed based on 19 morphological traits. The genotypes were grown according to simple lattice design with four replications across 2 years (2012 and 2013). Significant differences among accessions were revealed for the majority of traits. The coefficient of variation varied from 18.05 (number of seeds per silique of lateral branches) to 52.79 % (biological yield) in the first year and varied from 9.12 (number of seeds of silique per plant) to 36.05 % (biological yield) in the second year. The first four factors explained 83.92 % of the total variation at year 2012 while the first four factors explained 76.93 % of the total variation at year 2013 among 81 of garden cress accessions. At both years, days to flowering, days to maturing, height of first branch and height of first silique, number of silique per lateral branches and number of siliques per plant were the most important traits contributing to the first two factors. This indicates that breeding programs should be based on these traits for improvement of garden cress. The regions of origin of the accessions were dispersed in ten sub-units which the first factor axis was much more important than the second one in separating the regions of origin of the accessions and separated sub-units five from four other sub-units, but this factor axis could not separate accessions of sub-unit I. Based on the observed structures of variation, it is concluded that the magnitude of morphological variation in the material studied is high and the implications of the results for plant breeding programs are discussed. The results of the present study can be used for breeding and improvement of garden cress for various desired traits through hybridization in future.
机译：根据19种形态特征，评估了81个园丁的形态学变异，包括位于德国盖特斯莱本的莱布尼茨植物遗传与作物植物研究所的基因库部的77个种质，以及从伊朗不同地理和生物气候区收集的四个古代品种。基因型是根据简单的点阵设计生长的，在2年中（2012年和2013年）进行了四次复制。大多数性状的种质间显示出显着差异。第一年的变异系数从18.05（每个侧枝角果的种子数）变化到52.79％（生物产量），在第一年中，变异系数从9.12（每株角果角的种子数量）变化到36.05％（生物体产量）。第二年。在81个园丁种质中，前四个因子解释了2012年总变异的83.92％，而前四个因子解释了2013年2013年总变异的76.93％。在这两年中，开花的天数，成熟的天数，第一枝的高度和第一角果的高度，每个侧枝的角果的数量和每株植物的角果的数量是影响前两个因素的最重要特征。这表明育种程序应基于这些性状以改善水芹。这些种质的起源区域分散在十个亚基中，在分离这些种质的起源区域和将五个亚基与四个其他亚基分开的过程中，第一个因子轴比第二个更重要。该因子轴无法分离亚基I的加入。基于观察到的变异结构，可以得出结论，所研究材料的形态变异幅度很大，并且讨论了结果对植物育种程序的影响。本研究的结果可用于将来通过杂交育种和改良各种目的性状的水芹。

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