期刊
DIVERSITY-BASEL
卷 13, 期 2, 页码 -出版社
MDPI
DOI: 10.3390/d13020072
关键词
allozymes; Compositae; Ecological Niche Modeling; ETS region; Iberian Peninsula; low-copy genes; polyploidy
资金
- Catalan government (Ajuts a grups consolidats) [2017SGR1116]
Within the genus Centaurea L., polyploidy is common and believed to play a key role in diversification and evolution. In this study, molecular markers and environmental niche modeling were used to suggest that Centaurea tentudaica likely originated from Centaurea amblensis. The analysis supports the hypothesis of autopolyploidy, showing a close relationship between the two species.
Within the genus Centaurea L., polyploidy is very common, and it is believed that, as to all angiosperms, it was key in the history of its diversification and evolution. Centaurea tentudaica is a hexaploid from subsect. Chamaecyanus of unknown origin. In this study, we examined the possible autopolyploid or allopolyploid origin using allozymes and sequences of three molecular markers: nuclear-ribosomic region ETS, and low-copy genes AGT1 and PgiC. We also included three species geographically and morphologically close to C. tentudaica: C. amblensis, C. galianoi, and C. ornata. Neighbor-Net and Bayesian analyses show a close relationship between C. amblensis and C. tentudaica and no relationship to any of the other species, which suggest that C. tentudaica is an autopolyploid of C. amblensis. Allozyme banding pattern also supports the autopolyploidy hypothesis and shows high levels of genetic diversity in the polyploid, which could suggest multiple origins by recurrent crosses of tetraploid and diploid cytotypes of C. amblensis. Environmental niche modeling was used to analyze the distribution of the possible parental species during the present, Last Glacial Maximum (LGM), Last Interglacial Period (LIG), and Penultimate Glacial Maximum (PGM) environmental conditions. Supporting the molecular suggestions that C. tentudaica originated from C. amblensis, environmental niche modeling confirms that past distribution of C. amblensis overlapped with the distribution of C. tentudaica.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据