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实验窒实酸已经表明,病毒能把DNA从宿主细胞传递到其他细胞中,甚至可传递到别的物种细胞中.自然界中这样的传递能促使趋同进化,对趋同进化过程研究表明,在每次1-10百万年的周期内,一个基因能够被成功地传递给另一物种而产生一个相似的表型效果,一般来说,基因传递对进化的影响颇为可观.趋同进化可以看作是基因传递例证,在趋同进化中,有许多限制因素.首先,必须评价所讨论类群在时空上同时出现和完全的生殖隔离的存在性:再者,不论在病毒微粒可利用的有限空间,还是被传递的DNA需良好作用于各个杂合体的有丝分裂和减数分裂中的必备条件上均表明,只有相当短的DNA片断才有指望被传递.这限制了任何基因传递的可能效果.本文依据可能的趋同机制,简述和评价五个志留纪-泥盆纪牙形石谱系中趋同进化的例子.
Experiments of stigmatizing acids have shown that the virus can transfer DNA from host cells to other cells and even to other species of cells. In nature, such a transmission can promote the evolution of convergence, the evolution of convergence research shows that each time In a 1-10 million-year cycle, one gene can be successfully passed on to another to produce a similar phenotypic effect, and in general gene transfer has a significant impact on evolution. Convergent evolution can be thought of as There are a number of limiting factors in the evolutionary evolution of the example of gene delivery First of all, it is necessary to evaluate the existence of simultaneous and complete reproductive isolation of the groups in question in time and space: in addition, whether in the limited space available for the virus particles or The fact that the delivered DNA needs to work well on the mitosis and meiosis of each heterozygote shows that only a fairly short DNA fragment is expected to be delivered.This limits the possible effects of any gene delivery.This article is based on the possibility that The convergence mechanism of synoptic evolution in the five Silurian-Devonian conodont pedigrees is briefly described and evaluated.