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Advisor(s)
Abstract(s)
Beta patula Aiton is a crop wild relative (CWR) which belongs to the Gene Pool 1b and is
considered a Critically Endangered species, and is present in very specific environments, such as
the Desembarcadouro islet (DI) in Ponta de São Lourenço or Chão islet (CI) in the Desertas Islands.
The ISOPlexis Center (University of Madeira) has been providing continuous support for its in situ
conservation by keeping a management plan of wild populations and an ex situ conservation strategy
through the storage of accessions in the ISOPlexis GeneBank. The present work intends to present
the spatial distribution of genetic variability and diversity in these B. patula populations using eight
polymorphic Simple Sequence Repeat (SSR) markers. The overall results lead to the identification
of three spots with a high genetic diversity. CI with a small cluster of individuals shows a genetic
footprint different from DI, having unique alleles present in its population. DI has two distinct areas:
the western area, with a higher individual density but with a lower genetic diversity and higher
allele fixation; and the central area, with a lower individual count but with a higher genetic diversity
and with the presence of unique alleles. Despite some genetic differences, the comparison of the two
islets’ DI and CI populations shows that they have more similarities than differences. Analysis of the
Molecular Variance, based on the hierarchical cluster, showed a 9% diversity between populations,
68% among individuals, and 23% within individuals. This data will be used for the establishment of
a protocol to monitor and manage B. patula genetic diversity under a genetic reserve, subsequently
contributing to the European Genetic Reserve network implementation and the protection of this
important CWR.
Description
Keywords
Endemism Crop wild relative CWR SSR Genetic reserve In situ conservation . Escola Superior de Tecnologias e Gestão Faculdade de Ciências da Vida
Citation
Ragonezi, C.; Nóbrega, H.; Leite, M.I.; Freitas, J.G.R.d.; Macedo, F.L.; Carvalho, M.Â.A.P.d. Distribution of Genetic Diversity in Beta patula Aiton Populations from Madeira Archipelago, Portugal. Agriculture 2023, 13, 27. https://doi.org/10.3390/ agriculture13010027
Publisher
MDPI