Genome size of termites (Insecta, Dictyoptera, Isoptera) and wood roaches (Insecta, Dictyoptera, Cryptocercidae)
Genome size of termites (Insecta, Dictyoptera, Isoptera) and wood roaches (Insecta, Dictyoptera, Cryptocercidae)
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DOI：
10.1007/s00114-008-0395-7
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发表时间：
2008-05
影响因子：
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通讯作者：
Shigeyuki Koshikawa;S. Miyazaki;R. Cornette;Tadao Matsumoto;T. Miura
中科院分区：
文献类型：
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作者：
Shigeyuki Koshikawa;S. Miyazaki;R. Cornette;Tadao Matsumoto;T. Miura
基因组大小的进化已经与各种生物性状的进化相关联进行了讨论。在本研究中，通过 Feulgen 图像分析密度测定法和基于 6-二脒基-2-苯基吲哚 (DAPI) 的流式细胞术估计了 22 个网翅目物种的基因组大小。白蚁（等翅目）的单倍体基因组大小（C 值）范围为 0.58 至 1.90 pg，隐尾蠊（Cryptocercidae）的单倍体基因组大小（C 值）范围为 1.16 至 1.32 pg。与其他蟑螂（Blattaria）和螳螂（Mantodea）的已知值相比，这些值较低。相对较小的基因组大小以及它们的社会性似乎是等翅目+隐尾蚴的（同）无源性。在一些系统发育群体中，基因组大小进化被认为受到特定性状（例如细胞大小或发育速率）的选择压力的影响。目前的结果提出了一种可能性，即基因组大小受到与社会性进化相关的特征的选择压力的影响。
The evolution of genome size has been discussed in relation to the evolution of various biological traits. In the present study, the genome sizes of 22 dictyopteran species were estimated by Feulgen image analysis densitometry and 6-diamidino-2-phenylindole (DAPI)-based flow cytometry. The haploid genome sizes (C-values) of termites (Isoptera) ranged from 0.58 to 1.90 pg, and those ofCryptocercuswood roaches (Cryptocercidae) were 1.16 to 1.32 pg. Compared to known values of other cockroaches (Blattaria) and mantids (Mantodea), these values are low. A relatively small genome size appears to be a (syn)apomorphy of Isoptera +Cryptocercus, together with their sociality. In some phylogenetic groups, genome size evolution is thought to be influenced by selective pressure on a particular trait, such as cell size or rate of development. The present results raise the possibility that genome size is influenced by selective pressures on traits associated with the evolution of sociality.