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首页> 外文期刊>Plant Systematics and Evolution >Genome size variation in Macaronesian angiosperms: forty percent of the Canarian endemic flora completed
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Genome size variation in Macaronesian angiosperms: forty percent of the Canarian endemic flora completed

机译：Macaronesian被子植物的基因组大小变异：40％的加那利地方性植物群已完成

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摘要

Genome sizes for 127 Macaronesian endemic angiosperms from 69 genera and 32 families were estimated using propidium iodide flow cytometry. Only about 30-fold variation in 1C-values was found, ranging from 0.32 pg in Echium bonnetii to 9.52 pg in Scilla dasyantha. Taxa with very small DNA amounts ( 1C ≤ 1.4 pg) were themostdominant group (71.7%), whereas the frequency of other categories was much lower (18.9% and 9.4% in taxa with small (1.41 - 3.50 pg) and intermediate 1C-values ( 3.51 - 14.00 pg), respectively). Comparisons of average C- and Cx-values between Macaronesian endemics and non-Macaronesian representatives always revealed significantly smaller amounts in the former group at various taxonomic levels ( genus, family, major phylogenetic lineage). Potential relationship between nuclear DNA content and insular burst of speciation is suggested owing to the marked prevalence of very small genomes among angiosperms that underwent rapid adaptive radiation. Merging all the genome size data on Macaronesian angiosperms available shows that this. ora represents the best covered plant assemblage from the phytogeographic point of view.
机译：使用碘化丙啶流式细胞术估算了来自69个属和32个科的127个马卡龙地方性被子植物的基因组大小。仅在1C值中发现了大约30倍的变化，范围从邦氏ch鱼中的0.32 pg到达斯延草中的9.52 pg。 DNA量极少的分类单元（1C＆LE; 1.4 pg）是最主要的组（71.7％），而其他类别的频率要低得多（在小分类单元（1.41-3.50 pg）和中级1C-中的分类单元的频率分别低（18.9％和9.4％）值（分别为3.51-14.00 pg）。 Macaronesian流行病和非Macaronesian代表之间的平均C值和Cx值的比较始终显示，在前一组中，在不同的分类学级别（属，科，主要系统发育谱系）上，前者的含量明显较低。由于被快速适应性辐射的被子植物中非常小的基因组的显着流行，建议了核DNA含量与岛状物种爆发之间的潜在关系。合并可利用的Macaronesian被子植物的所有基因组大小数据表明。从植物地理学的角度来看，ora代表了最好的覆盖植物组合。

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