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Rich diversity in cultivated Finnish potato onions (Allium cepa var. aggregatum G. Don)
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Rich diversity in cultivated Finnish potato onions (Allium cepa var. aggregatum G. Don)
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Journal Article
Rich diversity in cultivated Finnish potato onions (Allium cepa var. aggregatum G. Don)
2022
Overview
Potato onion (
Allium cepa
var.
aggregatum
G. Don) remained the most widely grown onion type in Finland up to the 1950’s, after which the more productive cultivars of common onion replaced this vegetatively propagated onion type. The Finnish accessions have been maintained in two national plant genetic resources (PGR) collections since 1990’s but new samples have been obtained still later. In this research, we analysed the genetic diversity of potato onions and shallots, grown in home gardens and in PGR collection, and compared the uniformity of the two PGR collections. One hundred ten onion samples were analysed using eight microsatellite loci, which amplified 83 alleles in total. There was a large number of genetically different samples, forming four major groups in the dendrogram. The results show that there is still a lot of genetic diversity among the Finnish potato onions, even though they are propagated vegetatively. The rich diversity in the samples obtained from citizens reflects a valuable source of genetic resources maintained by home gardeners. The national collection has been updated on the basis of the results. To ensure the preservation of the rich onion heritage, efforts are needed to increase the availability of potato onion to home gardeners and commercial growers.
Publisher
Springer Netherlands,Springer Nature B.V
Subject
