Improved genetic distance-based spatial deployment can effectively minimize inbreeding in seed orchard

作     者：Boning Yang Haihong Sun Jiandong Qi Shihui Niu Yousry AEl-Kassaby Wei Li Boning Yang;Haihong Sun;Jiandong Qi;Shihui Niu;Yousry A. El-Kassaby;Wei Li

作者机构：Beijing Advanced Innovation Center for Tree Breeding by Molecular DesignNational Engineering Laboratory for Forest Tree BreedingCollege of Biological Sciences and TechnologyBeijing Forestry UniversityBeijing 100083China Liaoning Research Institute of Sandy Land Control and UtilizationXihe DistrictFuxin City 123000Liaoning ProvinceChina College of Information Science and TechnologyBeijing Forestry UniversityBeijing 100083China Department of Forest and Conservation SciencesFaculty of ForestryThe University of British Columbia2424 Main MallVancouverBritish Columbia V6T 1Z4Canada 

出 版 物：《Forest Ecosystems》 (森林生态系统（英文版）)

年 卷 期：2020年第7卷第1期

页      面：117-124,126,125,127页

核心收录：

学科分类：0710[理学-生物学] 090701[农学-林木遗传育种] 0907[农学-林学] 07[理学] 09[农学] 071007[理学-遗传学] 

基　　金：grants from The Fundamental Research Funds for the Central Universities(2015-02) the National Natural Science Foundation of China(Nos.31770713,31860221) 

主　　题：Seed orchard Deployment Inbreeding Genetic distance Clone SSR 

摘      要：Background:Inbreeding in seed orchards is expected to increase with the advancement of breeding cycles,which results in the delivery of crops with suboptimal genetic gain,reduced genetic diversity,and lower seed ***,a genetic distance-dependent method for clonal spatial deployment in seed orchards was developed and demonstrated,which reduced the inbreeding *** method’s main evaluation parameter of inbreeding is the genetic distance among individuals and the deployment method used an improved adaptive parallel genetic algorithm(IAPGA)based on Python *** inbreeding-prone Chinese Mongolian pine breeding population material originating from a single natural population,the proposed method was compared to a traditional orchard design and a distance-based design;namely,complete randomized block(RCB)and optimum neighborhood(ONA)designs,***:With the advancement of selective breeding cycles,group separation among orchard related individuals is expected to *** on the genetic distance among individuals,the IAPGA design was superior in significantly reducing the inbreeding level as compared to the two existing designs,confirming its suitability to advanced-generation orchards where relatedness among parents is *** the 1st,2nd,and mixed generations clonal deployment schemes,the IAPGA design produced lower inbreeding with 87.22%,81.49%,and 87.23%of RCB,and 92.78%,91.30%,and 91.67%of ONA designs,***:The IAPGA clonal deployment proposed in this study has the obvious advantage of controlling inbreeding,and it is expected to be used in clonal deployment in seed orchards on a *** studies are needed to focus on the actual states of pollen dispersal and mating in seed orchards,and more assumptions should be taken into account for the optimized deployment method.