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Reproductive biology and variation of nuclear ribosomal ITS and ETS sequences in the Calligonum mongolicum complex (Polygonaceae)

Catalog Data

Author:
Zhao, Yanfeng  Search this
Wen, Jun  Search this
Shi, Wei  Search this
Johnson, Gabriel  Search this
Pan, Borong  Search this
Object Type:
Smithsonian staff publication
Electronic document
Year:
2017
Abstract:
To explore the biosystematics of the Calligonum mongolicum complex (Polygonaceae), the flowering phenological period, breeding and pollination characters and seed set of the complex (Calligonum Mongolicum Turze, Calligonum chinense A. Los., Calligonum gobicum A. Los., Calligonum pumilum A. Los. and Calligonum zaidamense A. Los.) were documented in the Turpan Eremophyte Botanical Garden, China. The sequences of the nuclear ribosomal ITS and ETS region were employed to differentiate the Calligonum mongolicum complex and other species in sect. Medusae. The results showed species of the Calligonum mongolicum complex occupied overlapping flowering periods and had consistent pollination agents. Their breeding systems are all self-compatible, tend to be out-crossing and they interbreed amongst each other (out-crossing index, OCI = 4).The crosses within and amongst species had high seed sets (44 - 65%). Phylogenetic analyses of Calligonum sect. Medusae and the network analysis of nrDNA (ITS and ETS) in the complex suggest interbreeding amongst "species" within the complex and provide evidence for taxonomically merging the five species in the complex. The detected hybridisation, occurring within the complex, suggests the need to improve traditional methods of ex situ plant conservation in botanical gardens for maintaining genetic diversity of Calligonum within and amongst species from different geographic areas.
Doi:
10.3897/phytokeys.76.10428
Citation:
Shi, Wei, Wen, Jun, Zhao, Yanfeng, Johnson, Gabriel and Pan, Borong. 2017. Reproductive biology and variation of nuclear ribosomal ITS and ETS sequences in the Calligonum mongolicum complex (Polygonaceae). <i>PhytoKeys<i>, 76: 71-88. doi:10.3897/phytokeys.76.10428
Topic:
Botany  Search this
Plants  Search this
Natural History  Search this
See others in:
Botany
Data source:
Smithsonian Libraries
EDAN-URL:
edanmdm:SILSRO_142242