title: Association Mapping in Turkish Olive Cultivars Revealed Significant Markers Related to Some Important Agronomic Traits.
abstract: Olive (Olea europaea L.) is one of the most important fruit trees especially in the Mediterranean countries due to high consumption of table olive and olive oil. In olive breeding, the phenotypic traits associated to fruit are the key factors that determine productivity. Association mapping has been used in some tree species and a lot of crop plant species, and here, we perform an initial effort to detect marker-trait associations in olive tree. In the current study, a total of 96 olive genotypes, including both oil and table olive genotypes from Turkish Olive GenBank Resources, were used to examine marker-trait associations. For olive genotyping, SNP, AFLP, and SSR marker data were selected from previously published study and association analysis was performed between these markers and 5 yield-related traits. Three different approaches were used to check for false-positive results in association tests, and association results obtained from these models were compared. Using the model utilizing both population structure and relative kinship, eleven associations were significant with FDR ≤ 0.05. The largest number of significant associations was detected for fruit weight and stone weight. Our results suggested that association mapping could be an effective approach for identifying marker-trait associations in olive genotypes, without the development of mapping populations. This study shows for the first time the use of association mapping for identifying molecular markers linked to important traits in olive tree.
authors.affiliation: Department of Bioengineering, Ege University, Izmir, Turkey.
authors.forename: Hilal Betul
authors.initials: HB
authors.lastname: Kaya
authors.affiliation: Olive Research Station, Izmir, Turkey.
authors.forename: Oznur
authors.initials: O
authors.lastname: Cetin
authors.affiliation: Olive Research Station, Izmir, Turkey.
authors.forename: Hulya Sozer
authors.initials: HS
authors.lastname: Kaya
authors.affiliation: Olive Research Station, Izmir, Turkey.
authors.forename: Mustafa
authors.initials: M
authors.lastname: Sahin
authors.affiliation: Olive Research Station, Izmir, Turkey.
authors.forename: Filiz
authors.initials: F
authors.lastname: Sefer
authors.affiliation: Department of Bioengineering, Ege University, Izmir, Turkey. bahattin.tanyolac@ege.edu.tr.
authors.forename: Bahattin
authors.initials: B
authors.lastname: Tanyolac
mesh_terms: D054458:Amplified Fragment Length Polymorphism Analysis; D002874:Chromosome Mapping / Q000379:methods*; D018744:DNA, Plant / Q000235:genetics; D056726:Genetic Association Studies; D018895:Microsatellite Repeats; D031658:Olea / Q000235:genetics*; D020641:Polymorphism, Single Nucleotide; D040641:Quantitative Trait Loci; D014421:Turkey
chemical_list: D018744:DNA, Plant
keywords: Agronomic traits; Association mapping; Linkage disequilibrium; Olive tree