4.5 Article

Origin of traditional sweet chestnut (Castanea sativa Mill.) varieties from the Northwest of the Iberian Peninsula

期刊

TREE GENETICS & GENOMES
卷 18, 期 5, 页码 -

出版社

SPRINGER HEIDELBERG
DOI: 10.1007/s11295-022-01564-9

关键词

Castanea sativa; Origin; Microsatellite; Translocation; Introgression; Traditional variety

资金

  1. Breeding Program of chestnut in Galicia 2018-2020 - INDITEX
  2. project: Cambio da estrutura varietal dos soutos para revalorizar a producion da IXP Castana de Galicia-FEADER 2010/2 - European Agricultural Fund for Rural Development (EAFRD)
  3. project: Portaenxertos e variedades para os soutos novos-FEADER2013/16 - European Agricultural Fund for Rural Development (EAFRD)
  4. European Agricultural Fund for Rural Development (EAFRD) (2014-2021)
  5. project: Caracterizacion varietal das castanas da montana oriental - Axencia Galega de Desenvolvemento Rural (AGADER) (2019) [L19-1940-03-B124]
  6. project: Preparacion dunha coleccion-ensaio de variedades de castineiro do Courel-2020/150 - European Agricultural Fund for Rural Development (EAFRD)

向作者/读者索取更多资源

This study highlights the genetic structure of sweet chestnut varieties and identifies both native and translocated varieties in different regions. It provides valuable information for the utilization of sweet chestnut genetic resources.
Sweet chestnut is a valuable species, highly managed for centuries for nut and wood production, whose genetic structure was affected by translocations. In this study, we selected a total of 51 genetically different clonal varieties from Galicia (NW of the Iberian Peninsula), Central Iberian Peninsula, France and Italy that were genotyped at 9 microsatellites. Almost all Galician varieties include at least two accessions with the same genotype. Several datasets of reference samples, from 29 natural or naturalized populations, were used to classify them into several groups. Genetic distances among varieties showed its cultivation area. Almost all Galician varieties cultivated in orchards were grouped in a single cluster except to 'Famosa', 'Longal', 'Garrida' and 'Presa' that were classified to the Central Iberian group and 'Luguesa' and 'Carrelao' to the French-Italian varieties. The Bayesian analysis with reference samples identified a group of varieties that could be autochthonous in Galicia because they were assigned to the Atlantic or the Cantabrian cluster. Other varieties from the Galician inner mountains that belong to the Mediterranean cluster could be translocated because this gene pool was found previously in several populations in the Iberian and Italian Peninsulas. Additionally, a large number of hybrid varieties between the Western Mediterranean cluster and the Atlantic or the Cantabrian cluster were found. Further analysis indicated that these Mediterranean varieties could be originated in Mercurin, in Central Iberian or Italian Peninsulas, and that 'Luguesa' and 'Puga de Afora' could be translocated from France or Italy. The results provided in this work provide a valuable information for a more efficient use of sweet chestnut genetic resources.

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