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PLoS One. 2015 Jul 31;10(7):e0133123. doi: 10.1371/journal.pone.0133123. eCollection 2015.

Quantitative Analysis of Adventitious Root Growth Phenotypes in Carnation Stem Cuttings.

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Instituto de Bioingeniería, Universidad Miguel Hernández, Elche, Spain.
Departamento de Biología Vegetal (Fisiología Vegetal), Universidad de Murcia, Murcia, Spain.
Research and Development Department, Barberet & Blanc S.A., Puerto Lumbreras, Spain.


Carnation is one of the most important species on the worldwide market of cut flowers. Commercial carnation cultivars are vegetatively propagated from terminal stem cuttings that undergo a rooting and acclimation process. For some of the new cultivars that are being developed by ornamental breeders, poor adventitious root (AR) formation limits its commercial scaling-up, due to a significant increase in the production costs. We have initiated a genetical-genomics approach to determine the molecular basis of the differences found between carnation cultivars during adventitious rooting. The detailed characterization of AR formation in several carnation cultivars differing in their rooting losses has been performed (i) during commercial production at a breeders' rooting station and (ii) on a defined media in a controlled environment. Our study reveals the phenotypic signatures that distinguishes the bad-rooting cultivars and provides the appropriate set-up for the molecular identification of the genes involved in AR development in this species.

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