title: AFLP and RAPD analyses of genetic diversity of wild and/or weedy Guizotia (Asteraceae) from Ethiopia.
abstract: Amplified fragment length polymorphism (AFLP) and random amplified polymorphic DNA (RAPD) markers were used to provide estimates of the comparative genetic variation within and among populations of various Guizotia taxa with the goal of conserving and utilizing their genetic diversity. The percentage of polymorphic loci (P(S)) ranged from 28.5%-90% (AFLP) and 85.6%-99.6% (RAPD). The overall gene diversity estimate () has shown slight variation among taxa ranging from 0.32-0.37 (AFLP) and from 0.22 to 0.28 (RAPD). The within population diversity of "Chelelu" and "Ketcha" was found to be unexpectedly high. Both parameters used to estimate population differentiation (G(ST) and F(ST)) revealed the highest population differentiation G. zavattarii in followed by G. arborescens. Genetic variation among populations within a taxon was highly significant for all the five taxa as revealed by AMOVA (P<0.0001). The need for immediate conservation activities for G. arborescens and G. zavattarii, and factors that contribute to the existing genetic variability and population genetic structures are discussed.
authors.affiliation: Department of Crop Science, Swedish University of Agricultural Sciences, Alnarp, Sweden. mulatu.geleta.dida@ltj.slu.se
authors.forename: Mulatu
authors.initials: M
authors.lastname: Geleta
authors.forename: Tomas
authors.initials: T
authors.lastname: Bryngelsson
authors.forename: Endashaw
authors.initials: E
authors.lastname: Bekele
authors.forename: Kifle
authors.initials: K
authors.lastname: Dagne
mesh_terms: D019659:Asteraceae / Q000235:genetics*; D018744:DNA, Plant; D005002:Ethiopia; D005819:Genetic Markers; D014644:Genetic Variation; D005828:Genetics, Population; D005843:Geography; D012150:Polymorphism, Restriction Fragment Length; D019105:Random Amplified Polymorphic DNA Technique
chemical_list: D018744:DNA, Plant; D005819:Genetic Markers