Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học quốc tế đề tài: History and structure of the closed pedigreed population of Icelandic Sheepdogs | Genetics Selection Evolution BioMed Central Research History and structure of the closed pedigreed population of Icelandic Sheepdogs Pieter A Oliehoek 1 Piter Bijma1 and Arie van der Meijden2 Address 1Animal Breeding and Genomics Centre Wageningen University the Netherlands and 2Faculty of Geography Geosciences Biogeography Department Trier University Germany Email Pieter A Oliehoek - bmc@ Piter Bijma - Arie van der Meijden - frog@ Corresponding author Open Access Published 6 August 2009 Received 29 December 2008 Genetics Selection Evolution 2009 41 39 doi 1297-9686-41 -39 Accepted 6 August 2009 This article is available from http content 41 1 39 2009 Oliehoek et al licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License http licenses by which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. Abstract__ Background Dog breeds lose genetic diversity because of high selection pressure. Breeding policies aim to minimize kinship and therefore maintain genetic diversity. However policies like mean kinship and optimal contributions might be impractical. Cluster analysis of kinship can elucidate the population structure since this method divides the population in clusters of related individuals. Kinship-based analyses have been carried out on the entire Icelandic Sheepdog population a sheep-herding breed. Results Analyses showed that despite increasing population size and deliberately transferring dogs considerable genetic diversity has been lost. When cluster analysis was based on kinships calculated seven generation backwards as performed in previous studies results differ markedly from those based on calculations going back to the .
