title: Population structure of jatropha and its implication for the breeding program.
abstract: Jatropha (Jatropha curcas L.) has potential as an oilseed crop that requires the development of technology for its exploitation. The objective of this study was to assess the population structure and the genetic diversity in jatropha accessions at a global level using simple sequence repeat (SSR) molecular markers. Jatropha accessions (N = 109) from 10 countries were genotyped using 10 SSR markers. The results showed a low level of genetic diversity among 92 accessions originating from India, Mozambique, Ethiopia, Tanzania, Brazil, Honduras, and Indonesia, which were grouped in one cluster. In contrast, accessions from Mexico and Costa Rica showed high level of genetic variability. These accessions may be used to increase the genetic diversity of jatropha in the breeding populations. The study also showed the need of collecting activity from the center of diversity (Mexico and Costa Rica) to aggregate the genetic diversity in the international collections of jatropha.
authors.affiliation: Departamento de Agricultura, Universidade Federal de Lavras, Lavras, MG, Brasil.
authors.forename: D N
authors.initials: DN
authors.lastname: Santos
authors.affiliation: Unidade Pecuária Sul, Empresa Brasileira de Pesquisa Agropecuária, Bagé, RS, Brasil.
authors.forename: J L
authors.initials: JL
authors.lastname: Ferreira
authors.affiliation: Departamento de Agricultura, Universidade Federal de Lavras, Lavras, MG, Brasil.
authors.forename: M
authors.initials: M
authors.lastname: Pasqual
authors.affiliation: Departamento de Genética, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Campos dos Goytacazes, RJ, Brasil.
authors.forename: A L
authors.initials: AL
authors.lastname: Generoso
authors.affiliation: Departamento de Agricultura, Universidade Federal de Lavras, Lavras, MG, Brasil.
authors.forename: T A
authors.initials: TA
authors.lastname: Setotaw
authors.affiliation: Unidade Mista de Pesquisa em Genômica Aplicada a Mudanças Climáticas, Empresa Brasileira de Pesquisa Agropecuária, Campinas, SP, Brasil.
authors.forename: G M A
authors.initials: GM
authors.lastname: Cançado
authors.affiliation: Environmental Horticulture Department, Tropical Research and Education Center, University of Florida, Homestead, FL, USA.
authors.forename: W A
authors.initials: WA
authors.lastname: Vendrame
mesh_terms: D014644:Genetic Variation; D031286:Jatropha / Q000235:genetics*; D018895:Microsatellite Repeats; D000069600:Plant Breeding