arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1306.5373q-bio.PE
收藏

有性生殖的内在优势

An Intrinsic Advantage of Sexual Reproduction

Xiang-Ping Jia, Hong Sun

摘要:

真核生物中普遍存在的有性生殖(“性”)是进化生物学的一个谜。性别增加遗传变异只是告诉它的长期优越性的本质。有害突变的积累对生物体造成了直接和普遍的压力。与常识相反,我们的理论模型表明,繁殖率可以主动影响有害突变的积累。繁殖率与突变综合危害的交互作用导致临界繁殖率R*。当一个种群的繁殖率降低到R* 以下时,该种群将不可逆转地灭绝。有性群体的R* 小于1,无性群体的R* 大于1。达到承载力的种群的平均繁殖率必须降低到1。这解释了广泛的性别以及兼性和无性生物的持久性。计算机模拟支持我们的结论显着。

英文摘要:

The prevalence of sexual reproduction ("sex") in eukaryotes is an enigma of evolutionary biology. Sex increases genetic variation only tells its long-term superiority in essence. The accumulation of harmful mutations causes an immediate and ubiquitous pressure for organisms. Contrary to the common sense, our theoretical model suggests that reproductive rate can influence initiatively the accumulation of harmful mutations. The interaction of reproductive rate and the integrated harm of mutations causes a critical reproductive rate R*. A population will become irreversibly extinct once the reproductive rate reduces to lower than R*. A sexual population has a R* lower than 1 and an asexual population has a R* higher than 1. The mean reproductive rate of a population reached to the carrying capacity has to reduce to 1. That explains the widespread sex as well as the persistence of facultative and asexual organisms. Computer simulations support significantly our conclusion.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑