TAILIEUCHUNG - Báo cáo khoa hoc:" Genetic analysis and management in small populations: the Asturcon pony as an example"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học thế giới đề tài: Genetic analysis and management in small populations: the Asturcon pony as an example | 397 Genet. Sei. Evol. 30 1998 .397 405 Inra Elsevier Paris Note Genetic analysis and management in small populations the Asturcon pony as an example Susana Dunnera Maria L. Checaa Juan p. Gutierrez a Juan p. Martinb Javier Canona a Laboratorio de Genética Molecular Departamento de Production Animal Facultad de Veterinaria 28040 Madrid Spain b Departamento de Biología Escuela Técnica Superior de Ingenieros Agrónomos 28040 Madrid Spain Received 24 March 1998 accepted 28 May 1998 Abstract - Geneticists are faced with various problems when managing small natural populations . high inbreeding loss of economic value . We propose here the management of a small population through the example of the Asturcon a Celtic pony population by examining two sources of information a studbook created in 1981 and the polymorphism of ten microsatellite markers chosen according to the recommendations of IS AG International Society of Animal Genetics . This information allows US to estimate several genetic parameters useful in assessing the genetic situation of the population in order to propose conservation strategies. Results show the reliability of molecular information in populations where no studbook exists. Overall inbreeding value F and fixation index F -p are moderate F Fit effective number of founders is small n 22 and the population is divided into three distinct groups Fst p . The molecular heterozygosity HM computed in a random sample gives an accurate vision of the real inbreeding. These parameters and the application of the concept of average relatedness allow US to recommend to the breeders the choice of the best matings to control the inbreeding level while maintaining a low paternity error rate. Inra Elsevier Paris genetic management demographic parameters microsatellite equine Resume - Analyse génétique et gestion des petites populations 1 exemple du poney Asturcon. Les généticiens sont confrontes à plusieurs problèmes quand ils ont à .

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