CELLULAR DNA CONTENT AND EVOLUTION OF TELEOSTEAN FISHES
CELLULAR DNA CONTENT AND EVOLUTION OF TELEOSTEAN FISHES
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DOI：
10.1086/282801
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发表时间：
1972-01-01
影响因子：
2.9
通讯作者：
ROSEN, DE
中科院分区：
文献类型：
--
作者：
HINEGARDNER, R;ROSEN, DE
对275种硬骨鱼的单倍体DNA含量进行了测定。其中73个的染色体数目是已知的。DNA含量从4.4皮克到最低0.4皮克不等。特化程度较高或进化程度较高的鱼类，其DNA含量通常比一般鱼类要少。然而，有几个例外可能代表了目前处于进化辐射过程中的鱼类群体。染色体数目和DNA含量是相关的，这表明DNA的增加可能是通过某种形式的多倍体发生的。DNA的增加，然后是与专门化相关的逐渐减少，似乎伴随着鱼类的进化。
The haploid DNA content has been determined for 275 species of teleostean fishes. Chromosome numbers are known for 73 of these. DNA content ranges from 4.4 picograms down to a minimum of 0.4. The more specialized or evolutionarily advanced fishes usually have less DNA than the more generalized forms. There are, however, several exceptions which may represent fish groups that are now in the process of evolutionary radiation. Chromosome number and DNA content are correlated, indicating that increases in DNA may have occurred by some form of polyploidy. An increase in DNA, followed by a gradual decrease, which is associated with specialization, appears to have accompanied fish evolution.