Genome size variation among and within Ophiopogoneae species by flow cytometric analysis

被引：0
作者：
Guangyan Wang
Ying Meng
Yongping Yang
机构：
[1] Anqing Normal University,School of Life Sciences, The Province Key Laboratory of the Biodiversity Study and Ecology Conservation in Southwest Anhui
[2] Chinese Academy of Sciences,Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany
[3] Chinese Academy of Sciences,Plant Germplasm and Genomics Center, The Germplasm Bank of Wild Species, Kunming Institute of Botany
[4] Chinese Academy of Sciences,Institute of Tibetan Plateau Research at Kunming, Kunming Institute of Botany
[5] University of the Chinese Academy of Sciences,undefined
来源：
Brazilian Journal of Botany | 2017年 / 40卷
关键词：
DNA content; Genome size; Ophiopogoneae; Phylogeny; Ploidy level;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Genome size variation in a taxonomic group reflects evolutionary processes. DNA contents of Ophiopogoneae (40 populations of 31 species) were estimated by flow cytometry. Ploidy levels of Ophiopogon (ten species), Liriope (two species), and Peliosanthes (three species) were determined based on the DNA contents. The genus Peliosanthes showed significant larger genome sizes than Ophiopogon (P < 0.01), and Ophiopogon also significant larger than Liriope (P < 0.05). Intraspecific variation in genome size was mainly chromosome difference. The ITS sequence phylogeny splitted Ophiopogon into two clades, clade I comprising sect. Ophiopogon with diploids and tetraploids, and clade II including transitional species and sects. Ophiopogon and Peliosanthoides with diploids. The trend seemed to increase in genome size from Ophiopogon sect. Peliosanthoides (13.45 pg) to Ophiopogon sect. Ophiopogon (14.27 pg). Polyploidization may be evolutionary direction of Ophiopogon. Our results also suggested that the ‘increase’ hypothesis for genome size evolutionary may hold true in the genus Ophiopogon.
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页码：529 / 537
页数：8
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