Genetic diversity in local cultivars of garden pea (Pisum sativum L.) conserved ‘on farm’ and in historical collections
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During a national Swedish collection mission of vegetable varieties conserved ‘on farm’ more than 70 pea accessions were obtained, many of which had been grown locally for more than 100 years. In spite of a likely origin in the multitude of obsolete commercial pea varieties available on the Swedish seed market in the nineteenth century, the rediscovered local cultivars have lost their original names and cultivar identity while being maintained ‘on farm’. To analyze genetic diversity in the repatriated material, 20 accessions were genotyped with twelve SSR markers and compared with 15 obsolete cultivars kept in genebanks and 13 cultivars preserved as non-viable seeds collected in 1877–1918. Most of the local cultivars were genetically distinct from each other, and in only a few cases could a possible origin in a tested obsolete cultivar be suggested. These results reflect the wide diversity of pea cultivars present in Sweden during the nineteenth century. Both between and within accession genetic diversity was larger among the historical samples of obsolete cultivars compared to local cultivars and cultivars preserved in genebanks, indicating genetic erosion over time both in genebanks and during conservation ‘on farm’. The constraints on identifying and verifying historical cultivars using genetic markers are discussed.
KeywordsCultivar identification Genetic differentiation Pea Pisum sativum L. SSRs
We thank Svein Solberg and Fredrik Ottosson at the Nordic Genetic Resource Centre (NordGen), Alnarp, Sweden; Mike Ambrose at John Innes Centre, Norwich, UK and Ann-Charlotte Öberg at Vänersborgs museum, Vänersborg, Sweden for kindly providing the seed material. This work was funded by the Lagersberg foundation, the Swedish Board of Agriculture and the Royal Swedish Academy of Agriculture and Forestry (KSLA).
- Blixt S (1977) The gene symbols of Pisum. Pisum Genetics Newsletter 9: SupplementGoogle Scholar
- Hjelmqvist H (1979) Beiträge zur Kenntnis der prähistorischen Nutzpflanzen in Schweden. Opera Bot 47:1–58Google Scholar
- Johansson P, Aarsrud S, Öberg A-C (2003) Det underbara huset: Vänerborgs museum (The wonderful building: The Vänersborg Museum). Vänersborgs museums skriftserie, 1651-842X; 1Google Scholar
- Nygårds L, Leino MW (2013) Klint Karins kålrot och mor Kristins böna: om fröuppropets kulturarv (Klint Karin’s swede and mother Kristin’s bean: cultural heritage of the seed call). Swedish Univ Agric Sci, AlnarpGoogle Scholar
- Osvald H (1959) Åkerns nyttoväxter (Agricultural utility plants). StockholmGoogle Scholar
- R Development Core Team (2007) R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, Austria. ISBN 3-900051-07-0, URL. http://www.R-project.org
- Svensson K (2004) Trädgårdsärt och trädgårdsböna: kartläggning av de i Sverige marknadsförda sorterna 1850-1970 (Garden pea and garden bean: Inventory of varieties of the Swedish market between 1850-1970). Swedish Univ Agric Sci, AlnarpGoogle Scholar
- Veteläinen M, Negri V, Maxted N (2009) European landraces on-farm conservation, management and use. Bioversity Technical Bulletin No 15. Bioversity International, RomeGoogle Scholar
- Zohary D, Hopf M, Weiss E (2012) Domestication of plants in the old world: the origin and spread of domesticated plants in south-west Asia, Europe, and the Mediterranean Basin, 4th edn. Oxford University Press, OxfordGoogle Scholar