Abstract
Long terminal repeat (LTR)-retrotransposons are mobile genetic elements that are ubiquitous in plants and constitute a major portion of their nuclear genomes. LTR- retrotransposons possess unique properties that make them appropriate for investigating relationships between populations, varieties and closely related species. Myrtus communis L. is an evergreen shrub growing spontaneously throughout the Mediterranean area. Accessions show significant variations for agriculturally important traits, so the development of specific molecular markers for conservation and characterization of myrtle germplasm is desirable to conserve biodiversity. In this study, we isolated the first retrotransposon Ty1-copia-like element (Tmc1) in Myrtus communis L. genome and used this as a molecular marker. We successfully employed the S-SAP marker system to specifically characterize four myrtle accessions belonging to different areas in the province of Caserta (Italy). The high level of polymorphism detected in isolated LTRs, make Tmc1 a good molecular marker for this species. Our findings confirm that retrotransposon-based molecular markers are particularly valuable tools for plant molecular characterization studies.
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