Inter simple sequence repeat analysis of genetic diversity and relationships in cultivated barley of Nordic and Baltic origin
Inter simple sequence repeat analysis of genetic diversity and relationships in cultivated barley of Nordic and Baltic origin
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DOI：
10.1111/j.1601-5223.2004.01867.x
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发表时间：
2004-01-01
期刊：
影响因子：
2.7
通讯作者：
Weibull, J
中科院分区：
文献类型：
--
作者：
Brantestam, AK;von Bothmer, R;Weibull, J
本研究评估了可能发生在上个世纪的商业育种的结果，在北欧和波罗的海国家的大麦的遗传多样性和关系的推定的变化。利用4个ISSR引物对227份供试材料进行分析，共获得47个多态性位点。每个位点的Shannon-Weaver多样性值在0.012 ~ 0.693之间。总的来说，随着时间的推移，没有观察到显着的遗传多样性变化。然而，在北欧和波罗的海国家南部的材料中观察到多样性显著减少。在材料从北方部分没有减少的多样性进行了观察。世纪中期育成的六棱大麦品种遗传多样性较低，但现代品种与地方品种和老品种之间的遗传多样性差异不显著。来自不同原产国的材料的遗传多样性变化幅度也不同。聚类分析清楚地将材料分为两组。第一个聚类包含了所有六棱材料的86.5%，而第二个聚类包含了所有二棱材料的97.4%。
This study evaluates putative changes of genetic diversity and relationships of barley in the Nordic and Baltic countries that might have taken place during the last century as a result of commercial breeding. Four ISSR primers were used to analyse 227 accessions, yielding a total of 47 polymorphic loci. Shannon-Weaver diversity values for each locus ranged from 0.012 to 0.693. Overall, there were no significant changes of genetic diversity observed over time. A significant decrease of diversity was, however, observed in material from the southern parts of the Nordic and Baltic countries. In material from the northern parts no decrease of diversity was observed. The genetic diversity of six-rowed barley bred in the middle of the 20th century was low, but there was no significant difference between modern accessions and landraces or old cultivars. The magnitude in changes of genetic diversity differed also in material from different countries of origin. A cluster analysis clearly separated the material into two groups. The first cluster included 86.5% of all six-rowed accessions, whereas the second cluster contained 97.4% of all two-rowed accessions.