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首页> 外文期刊>Genetic Resources and Crop Evolution >Morphological traits based genetic diversity assessment of Ethiopian potato [Plectranthus edulis (Vatke) Agnew] populations from Ethiopia
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Morphological traits based genetic diversity assessment of Ethiopian potato [Plectranthus edulis (Vatke) Agnew] populations from Ethiopia

机译：基于埃塞俄比亚马铃薯的遗传多样性评估埃塞俄比亚人群的基于埃塞俄比亚土豆的遗传多样性评估

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摘要

Ethiopian potato syno Ethiopian dinich [Plectranthus edulis (Vatke) Agnew], is one of the 'orphans' and 'neglected' indigenous edible tuber crops in the country. Nowadays, the crop, both the cultivated and wild forms, are close to total extinction partly because of climate change, habitat instability, and very little research intervention targeting its improvement and conservation. Hence, in the present study, we intended to generate baseline information through morphological traits based genetic diversity estimation that is useful for improvement and conservation actions. We tested 174 populations at three experimental locations using alpha lattice design with two replications/location and three blocks/replication/location following appropriate management practises. Data were recorded for 12 qualitative and 16 quantitative traits and analysed using Statistical analysis software 9.0, MINITAB(R) 14.13 and FigTree v1.4.3 packages. A wide range of variations and mean performance values have been recorded for the phenetic traits, suggesting the existence of considerable variations for use in breeding and conservation. Analysis of variance revealed a highly significant (p < 0.001) variation among the populations and non-significant environment-population interaction for most of the quantitative traits, implying the minimal environment effect on their expression. High genotypic coefficients of variation, coupled with a high estimate of broad sense heritability and high genetic advance as a percent of population mean, were observed in tuber weight per hill, number of primary branches per plant, tuber number per hill and number of plants per hill with eventually large magnitude of positive phenotypic and genotypic correlation with tuber yield per hectare. This result suggests importance of the traits in selection program that targets tuber yield improvement. Principal components analysis revealed about 77% of the total variation for the first six principal axes with high factor loadings again from the same traits. The populations were grouped into four clusters but weak region (zone) of origin-based pattern implying the historical or contemporary gene flow, specially germplasm (tubers) exchange among the regions (ethnicities). In general, there is high genetic-based variability for Ethiopian potato improvement and conservation. However, more collections and evaluation over multiple locations and seasons are recommended for well-refined genetic diversity estimation.
机译：埃塞俄比亚马铃薯Syno埃塞俄比亚·迪西希[庞蒂坦·Edulis（Vatke）agnew]，是该国的“孤儿”和“被忽视”的土着食用块茎作物之一。如今，农作物，栽培和野生形式，部分因气候变化，栖息地不稳定，统计其改善和保护的研究干预很少，部分地灭绝。因此，在本研究中，我们旨在通过基于基于遗传多样性估计的形态特征来产生基线信息，这对于改进和保护行为有用。我们在三个实验位置测试了174个群体，使用Alpha格式设计，其中包含两个复制/位置以及在适当的管理实践之后的三个块/复制/位置。记录了12个定性和16种定量性状的数据，并使用统计分析软件9.0，Minitab（R）14.13和Figtree V1.4.3包分析。对于苯特征来说，已经记录了广泛的变化和平均性能值，这表明存在在繁殖和保护中使用的相当多种变化。方差分析揭示了群体的高显着（P <0.001）变异，以及大多数定量特征的非显着环境 - 群体相互作用，这意味着对其表达的最小环境影响。高基因型的变异系数，与广义遗传性和高遗传进步的高估计，作为百分之叶的百分比，在每山块茎重量中观察到，每株植物的主要分支数，每山块菌数和每个植物数量山丘最终具有较大的阳性表型和基因型相关性与每公顷块茎产量的相关性。这一结果表明，选择块茎产量改善的选择计划中的特征的重要性。主要成分分析显示了前六个主轴的总变化的约77％，具有高因素负载从相同的性状。将群体分为四个集群，但基于原产地的模式（区域），暗示了地区（种族）之间的历史或当代基因流动，特殊种质（块茎）交换。一般而言，埃塞俄比亚土豆改善和保护存在高遗传的变化。然而，建议在精致的遗传多样性估计上使用多个地点和季节的更多收集和评估。

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