Outbreeding management offers the promise of genetic rescue for an endangered lizard  

作　　者：Guannan Wen Hongxin Xie Shuyi Luo Chunsheng Yang Xianwu Tang Yibo Hu Weiguo Du 

机构地区：[1]Key Laboratory of Animal Ecology and Conservation Biology,Institute of Zoology,Chinese Academy of Sciences,1#Beichen West Road,Chaoyang District,Beijing,100101,P.R.China [2]University of Chinese Academy of Sciences,19A#Yuquan Road,Shijingshan District,Beijing,100049,P.R.China [3]Daguishan National Nature Reserve for Crocodile Lizards,80#Jianshe West Road,Babu District,Hezhou,542800,Guangxi,P.R.China

出　　处：《Current Zoology》2024年第6期721-727,共7页动物学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(31821001 and 32170528).

摘　　要：Inbreeding and loss of genetic diversity increase the extinction risk of small isolated populations.Genetic rescue by augmenting gene flow is a powerful means for the restoration of lost genetic variation.In this study,we used multigenerational pedigrees and neutral genetic markers to assess the consequences of outbreeding management in the Chinese and Vietnamese populations of the endangered crocodile lizard,Shinisaurus crocodilurus.Compared with the purebred Chinese population,the outbreeding population exhibited greater molecular genetic variation and a 3-fold larger population size.Moreover,the first-generation hybrids had a longer lifespan than purebreds,suggesting that outbreeding depression did not occur,but the long-term fitness effect of outbreeding needs to be further evaluated.Our study provides valuable insights into the potential for genetic rescue in the endangered crocodile lizard,emphasizing the importance of an evidence-based genetic management approach to address the risks of inbreeding and outbreeding depression in threatened populations.

关 键 词：conservation genetics ex situ conservation genetic rescue HETEROSIS INBREEDING 

分 类 号：Q95[生物学—动物学]