植物迁地保护中的遗传风险  

Genetic Risks in Plant Ex Situ Conservation

作　　者：康明[1] 叶其刚[1] 黄宏文[1] 

机构地区：[1]中国科学院武汉植物园武汉植物所,武汉430074

出　　处：《遗传》2005年第1期160-166,共7页Hereditas（Beijing)

基　　金：中国科学院知识创新重要方向性项目(KSCX2-SW-104);国家自然基金项目(30370153);中国科学院武汉植物园创新工程所长基金(05035122)~~

摘　　要：稀有濒危植物迁地保护的长期目标之一就是要保护物种的遗传多样性和进化潜力。文章中介绍了稀有濒危植物在植物园迁地保护过程中存在的一系列遗传风险。由于引种或取样的不足,容易导致被保存的物种缺乏足够的遗传代表性;盲目的引种、不合理的定植以及材料的来源不清则会导致稀有濒危植物的遗传混杂、近交衰退或杂交衰退;人为选择和生长环境的改变也容易造成濒危物种对迁地保护的遗传适应。在实际的迁地保护工作中,这些遗传风险往往被忽视。植物迁地保护中遗传风险将严重影响稀有濒危物种的回归和恢复。植物园应当重视濒危植物的遗传管理,以降低或避免迁地保护中的遗传风险。Conserving genetic diversity of rare and endangered species and their evolutionary potential is one of the long-term goals of ex situ conservation. Some potential genetic risks in ex situ conservation in botanical gardens are presented. The preserved species may lack genetic representativity because of poor sampling. Inappropriate plantations, inadequate records and unclear kinships jeopardize endangered species to genetic confusion, inbreeding depression or outbreeding depression. Artificial selection and habitat conversion also potentially result endangered plants in (adapting) to ex situ conservation, which had been usually overlooked. All the genetic risks can decrease the success of reintroduction and recovery. Therefore, appropriate genetic management should be carried out in botanical gardens to decrease or avoid genetic risks in ex situ conservation.

关 键 词：植物园 迁地保护 遗传风险 遗传管理 

分 类 号：Q943[生物学—植物学]