青藏高原首例克隆濒危牛健康成长

Core Viewpoint - The cloning of the rare Zhangmu cattle in Tibet represents a significant step in the conservation of this endangered breed, which has seen its population increase from 19 to 37 due to advanced cloning techniques and protective measures [1][2]. Group 1: Cloning and Conservation Efforts - The Zhangmu cattle, a unique genetic resource in Tibet, was confirmed to have only 19 individuals during the 2021 national livestock genetic resource survey, indicating a critically endangered status [1]. - In May 2023, the first cloned Zhangmu calf was successfully born at the Tibet Animal Disease Prevention and Control Center, marking a pioneering effort in high-altitude cloning [1]. - The cloned calf is under 24-hour monitoring, showing stable physiological indicators, strong appetite, and good growth, with plans for breeding trials to support population recovery [1]. Group 2: Population Growth - The population of Zhangmu cattle has increased from 19 to 37 due to breakthroughs in cloning technology and coordinated conservation measures [2].