Next-Generation Sequencing (NGS) Identified Species-Specific SSR and SNP Markers, Allow the Unequivocal Identification of Strawberry Tree (Arbutus unedo L.) Germplasm Accessions and Contribute to Assess Their Genetic Relationships

• Published in: Plants (Basel) Vol. 12; no. 7; p. 1517
• Main Authors: Pereira, Ricardo, Anjos, Isabela, Reis, João, Dias, Carolina, Leitão, José
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 31.03.2023; MDPI
• Subjects: Alleles; Arbutus unedo; Arbutus unedo L; Bioactive compounds; Chemical fingerprinting; Confectionery; Enzymes; Flora; France; Fruits; Genetic relationship; Genetic variability; genetic variation; genome assembly; Genomes; Genomics; Germplasm; germplasm conservation; Iberian Peninsula; Identification; Ireland; Mediterranean region; Next-generation sequencing; plant germplasm collection; Portugal; Single-nucleotide polymorphism; SNP markers; SSR markers; Strawberries; strawberry tree; traditional medicine; Trees; Portugal; Iberian Peninsula; France; Mediterranean region; Ireland; plant germplasm collection; Arbutus unedo L; ISSR markers; SSR markers; RAPD markers; SNP-CAPS markers; SNP markers; strawberry tree; plant molecular fingerprints; plant genetic relationships; genome assembly
• DOI: 10.3390/plants12071517
• ISSN: 2223-7747

The strawberry tree (Arbutus unedo L.), an evergreen bush to small tree of the Ericaceae family, is a main component of the natural flora of the Mediterranean basin that also grows profusely through the Iberian Peninsula, southwestern France, and Ireland. The small edible red fruits are usually used to produce preserves, jams, and liquors, as the Portuguese “aguardente de medronho”. The leaves and fruits have been used for a long time in traditional medicine, and their bioactive compounds are presently the subject of intense research. A strawberry tree germplasm collection was recently established by the company Corte Velada (Odiáxere, Portugal). A set of 50 germplasm accessions was selected for a breeding program. A next-generation sequencing project was performed, resulting in the establishment of the first strawberry tree genome assembly and further identification of 500 SSR and 500 SNP loci. Individual molecular fingerprints for the unequivocal identification of the selected 50 accessions were established based on 71 markers alleles amplified by 4 SSR and 9 SNP markers. The same species-specific markers alleles combined with 61 random amplified markers amplified by 5 RAPD and 5 ISSR primers were used to assess the genetic variability and genetic relationships among the selected accessions.