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Publication
Unravelling wild carrot differentiation in Europe: preliminary data on a candidate gene approach
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Advisor(s)
Abstract(s)
Carrot is an outcrossing species and levels of gene flow between populations,
and even between wild and domesticated relatives, are expected to be high. Cases of
natural hybridization and introgression of crops and wild relatives have been
reported. Have these events diluted any putative habitat-adapted genotypes? In other
words, can we still find a correlation between wild carrot genotypes and
regional/local environment? We have chosen to start addressing this question using a
member of the alternative oxidase (AOX) gene family. AOX genes seem to be linked to
all kinds of abiotic and biotic stress reactions. Wild carrots were sampled in an
environmental gradient across Western Europe. This gradient included sampling
points with more deviating conditions, such as Sierra de Guadarrama or the central
Pyrenees and the French Massif Central. Phylogenetic reconstruction on this
molecular marker is to be combined with geographic, climatic, and ecological
evidence. So far, the preliminary results suggest the existence of a biogeographical
barrier at the Pyrenees, and higher gene diversity than initially expected. From an
applied point of view, diversity of functional traits is much more relevant than species
diversity. Gene transfer from wild to cultivated plants has contributed to the evolution
of crop species. Providing that deterioration of genetic resources and biodiversity loss
have not been drastic, gene transfer from wild plants has the potential to further
contribute to a (targeted) improvement of cultivars.
Description
Keywords
Daucus carota L. AOX Habitat-adapted Wild crop relatives Hybridization . Escola Superior de Tecnologias e Gestão
Citation
Nobre, T., Ragonezi, C., & Arnholdt-Schmitt, B(2017). Unravelling wild carrot differentiation in Europe – preliminary data on a candidate gene approach. Acta horticulturae, v. no.1153 , 279-286. doi: 10.17660/ActaHortic.2017.1153.41
Publisher
International Society for Horticultural Science (ISHS)