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个体杂合性成功预测沙漠龟易位
作者:小柯机器人 发布时间:2020/11/29 21:58:29

美国加州大学洛杉矶分校Peter A. Scott研究组取得最新进展。他们利用个体杂合性成功预测受威胁的沙漠龟的易位。这一研究成果发表在2020年11月27日出版的国际学术期刊《科学》杂志上。

他们分析了166种在二十年内存活或死亡的易位沙漠龟的基因组数据集。他们使用基因组数据推断易位陆龟的地理起源,发现个体杂合性预测了陆龟的生存,而易位距离或起源的地理单位却没有。他们的结果提出了一个相对简单的指标,表明易位个体生存的可能性:杂合性。

据悉,人为环境改变使多达一百万种物种面临灭绝的危险。减少灭绝风险的一项管理措施是将个体转移到他们已经消失的地方或生物学家认为他们有很大生存机会的新地方。为了使这种生存概率最大化,标准做法是将动物从可能包含相关个体的最近种群中移出。

附:英文原文

Title: Individual heterozygosity predicts translocation success in threatened desert tortoises

Author: Peter A. Scott, Linda J. Allison, Kimberleigh J. Field, Roy C. Averill-Murray, H. Bradley Shaffer

Issue&Volume: 2020/11/27

Abstract: Anthropogenic environmental modification is placing as many as 1 million species at risk of extinction. One management action for reducing extinction risk is translocation of individuals to locations from which they have disappeared or to new locations where biologists hypothesize they have a good chance of surviving. To maximize this survival probability, the standard practice is to move animals from the closest possible populations that contain presumably related individuals. In an empirical test of this conventional wisdom, we analyzed a genomic dataset for 166 translocated desert tortoises (Gopherus agassizii) that either survived or died over a period of two decades. We used genomic data to infer the geographic origin of translocated tortoises and found that individual heterozygosity predicted tortoise survival, whereas translocation distance or geographic unit of origin did not. Our results suggest a relatively simple indicator of the likelihood of a translocated individual’s survival: heterozygosity.

DOI: 10.1126/science.abb0421

Source: https://science.sciencemag.org/content/370/6520/1086

期刊信息
Science:《科学》,创刊于1880年。隶属于美国科学促进会,最新IF:41.037