关键词: 形态发生, 无角牛, 基因突变, 基因编辑, 发生机制

Abstract: Horns are the distinctive feature of  Bovidae family. However, these appendages have been undesirable in the modern cattle industry because they can lead to human injuries, but cattle dehorning can lead to economic losses and go against with the animal welfare. So more attention are focused on the polled trait. In this paper, we reviewed the morphological and occurrence regularity of horn, the natural hornless and scurs trait. We also summarized the gene mutations related to the hornless and scurs, and the progress of biotechnology cultivation of hornless cattle. At last, the research direction of the occurrence mechanism of horn traits was prospected.

Key words: morphological occurrence, hornless, gene mutation, gene editing, occurrence mechanism