title: Genetic relatedness of Portuguese almond cultivars assessed by RAPD and ISSR markers.
abstract: Randomly amplified polymorphic DNA (RAPD) and inter-simple sequence repeat (ISSR) markers were used to analyse the genetic diversity of Portuguese Prunus dulcis cultivars and their relationship to important foreign cultivars. Of the primers tested, 6 (out of 60) RAPD and 5 (out of 18) ISSR primers were selected for their reproducibility and high polymorphism. Out of 124 polymerase chain reaction fragments that were scored, 120 (96.8%) were polymorphic. All the plants could be discriminated and constitute a very heterogeneous group. Five unidentified almond plants found in the region of Foz Côa (north Portugal) and wild almond (P. webbii) from Italy and Spain were also included. Four main groups of plants could be distinguished: P. dulcis cultivars; one Foz Côa plant; P. webbii; and P. persica (outgroup). The segregating Foz Côa plant may represent a feral individual or a hybrid between P. dulcis and P. webbii.
authors.affiliation: IBET/ITQB, Quinta do Marquês, 2784-505 Oeiras, Portugal. mmartins@itqb.unl.pt
authors.forename: M
authors.initials: M
authors.lastname: Martins
authors.forename: R
authors.initials: R
authors.lastname: Tenreiro
authors.forename: M M
authors.initials: MM
authors.lastname: Oliveira
mesh_terms: D005819:Genetic Markers / Q000235:genetics; D014644:Genetic Variation / Q000235:genetics; D006823:Hybrid Vigor / Q000235:genetics; D006824:Hybridization, Genetic; D020071:Interspersed Repetitive Sequences / Q000235:genetics*; D010802:Phylogeny; D016133:Polymerase Chain Reaction; D011174:Portugal; D027861:Prunus / Q000235:genetics*; D019105:Random Amplified Polymorphic DNA Technique / Q000379:methods*
chemical_list: D005819:Genetic Markers