性的进化:起源和维持  

Why sex: origin and maintenance

作　　者：林苑[1] 贺林[1] 徐晋麟[1] 

机构地区：[1]上海交通大学生命科学技术学院,上海200240

出　　处：《生命科学》2002年第4期197-200,共4页Chinese Bulletin of Life Sciences

摘　　要：有性繁殖是真核生物生命周期的一个普遍特征。然而,在解释有性繁殖的这种普遍存在时却遇到了许多的困难,包括雄性的双重损失和重组负荷等。那么,有性繁殖是如何起源和维持的?人们提出了许多可能解释的假说,但是到目前为止还没有一个明确的答案。作者就众多的理论做一个简明综述。Sex prevails in nature, presenting as a general feature of the life cycle of eukaryotes. The explanation of this widespread occurrence of sex met several problems, including both the twofold-cost of male and recombination load. Then how does sex begin, and why does it thrive? Biologists have been interested in this field for quite some time, coping up with a bunch of theories about just what that advantage might be, but so far there is no single clear answer. We review some theories which render some important understanding to the advantage of sex in the past and also now.

关 键 词：有性繁殖 重组 进化优势 

分 类 号：Q132.13[生物学—普通生物学] Q784