Karyotypes of nineteen species of Asteraceae in the Hengduan Mountains and adjacent regions.

Karyotypes of nineteen species of Asteraceae in the Hengduan Mountains and adjacent regions.
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横断山及邻近地区19种菊科植物的核型分析

DOI:
10.1016/j.pld.2017.08.001
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发表时间:
2017-08
期刊:
影响因子:
4.8
通讯作者:
Li Z
Li Z
中科院分区:
生物学2区
文献类型:
--
作者:
Sun W;Ma X;Zhang J;Su F;Zhang Y;Li Z

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横断山区是生物多样性的热点地区。本文报道了该地区菊科19种21居群的核型,其中14种为首次报道。我们还研究了菊科植物的多倍性,并总结了文献中69个同属类群的核型数据。在这些属中,该地区有5个不同的倍性水平,但最优势的是二倍体(73.08%)。没有直接证据表明,倍性水平和核型不对称性与横断山区菊科植物的分布有关。这表明,多倍体(26.92%)在这些植物的进化历史中可能没有发挥重要作用,即使在这些属中,古多倍体的比例很高(46.15%)。
The Hengduan Mountains region is a biodiversity hotspot. In this study, we report the karyotypes of 19 species (21 populations) of Asteraceae from this region, 14 of which are reported for the first time. We also examined polyploidy in Asteraceae plants and summarized karyotype data in the literature for 69 congeneric taxa. In these genera, there were five different ploidy levels in the region, though the most dominant was diploid (73.08%). There is no direct evidence that ploidy level and karyotype asymmetry are associated with the distribution of recorded Asteraceae species from the Hengduan Mountains. This suggests that polyploidy (26.92%) may not play an important role in the evolutionary history of these plants, even though, among these genera, the ratio of paleopolyploidy was high (46.15%).
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发表时间: 2004-03-01
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