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Project log

Juan Simon
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Juan Simon
added 2 research items
A new version of the earlier chromosome database of tribe Delphinieae (Simon, J., M. Bosch, J. Molero & C. Blanché 1999, A conspect of chromosome numbers in tribe Delphinieae (Ranunculaceae). Biodiversity Electronic Publications, 1 [on line]. [Available at http://hdl.handle.net/2445/95875]) is presented, after an accurate extensive literature and internet survey, by adding the chromosome counts for the genera Aconitum L. (including Gymnaconitum (Stapf) Wei Wang & Z. D. Chen), Delphinium L. (including Staphisagria Spach), Consolida (DC.) S.F. Gray and Aconitella Spach., accumulated in the last 17 years. A total number of 2298 reports is presented, belonging to 388 species, representing about 44 % of the total species number of the tribe (an increase of c. 120% if compared with the 1097 reports captured in the 1999 version). This increase is due both to chromosome research extension (analyzed as counts/year) and an improved information capture system (including checking of populations location through Cyrillic, Japanese and Chinese alphabets). Additionally, recent taxonomic advances, synonimization and new phylogenetic criteria have also been taken in account. The main basic number x = 8 is found at 2x, 3x, 4x, 5x, 6x, and 8x ploidy levels, whereas x = 9 is much rarer. Poliploidy is more frequent in perennial taxa (Aconitum and Delphinium s.str.) whereas in annuals disploidy (both increasing and decreasing) takes more importance and should be considered as source of new evolutionary opportunities. The most frequent counts are 2n = 16 and 32 but counts of 2n = 12, 14, 17, 18, 20, 24, 26, 28, 30, 34, 40, 46, 48, 52, 64 have also been recorded. In 19 species more than one different chromosome number has been reported and 76 species showed different ploidy levels. The Delphinieae Chromosome Database (DCDB) provides the most complete current available information on chromosome numbers of Delphinieae, yearly actualized and easily available by a system searchable through international platforms as CCDB (Rice et al., 2015), to be useful for general building of cytotaxonomical databases and for specific research ongoing projects of systematics of Ranunculaceae. It is based in MsAccess/MsExcel software, and includes 3-levels of taxonomic resolution (published name, database accepted name and PlantList Standard name), and geographic origin of each count (country, and population when provided in the original source).
A new version of the earlier chromosome database of tribe Delphinieae is presented (v. 2.0, updated 23/4/2016 and available online at http://hdl.handle.net/2445/98702), after an accurate extensive literature and Internet survey, by adding the chromosome counts for the genera Aconitum L. [including Gymnaconitum (Stapf) Wei Wang & Z. D. Chen], Delphinium L. (including Staphisagria Spach), Consolida (DC.) S. F. Gray and Aconitella Spach, accumulated in the last 17 years. A total number of 2598 reports are presented, belonging to 389 species and to a total of 467 taxa, and representing 44.5% of the total species number of the tribe (an increase of c. 137% compared with the 1097 reports gathered in the 1999 version). This increase is due both to chromosome research progress (analysed as counts/year) and an improved information capture system (including checking of populations location through Cyrillic alphabet, and Japanese and Chinese writing systems). Additionally, recent taxonomic advances, synonimization and new phylogenetic criteria have also been taken into account. The main basic number x = 8 is found at 2x, 3x, 4x, 5x, 6x, and 8x ploidy levels, whereas x = 9 is much rarer. Polyploidy is more frequent in perennial taxa (Aconitum and Delphinium s. str.) whereas in annuals, disploidy (both increasing and decreasing) takes more importance and should be considered as a source of new evolutionary opportunities. The most frequent counts are 2n = 16 and 32, but counts of 2n = 12, 14, 17, 18, 20, 24, 26, 28, 30, 34, 40, 46, 48, 52, and 64 have also been recorded. In 20 species more than one different chromosome number has been reported and 81 species showed different ploidy levels. The Delphinieae Chromosome Database (DCDB) provides the most complete current available information on chromosome numbers of Delphinieae, yearly updated, and aimed to be useful for general building of cytotaxonomical databases and for specific research ongoing projects of systematics of Ranunculaceae. It is based in MsAccess/MsExcel software, and includes three levels of taxonomic resolution (published name, database accepted name, and Plant List standard name), and the geographic origin of each count (country, and population when provided in the original source).
Juan Simon
added a research item
The chromosome database of the wild vascular flora of the Catalan Countries (CromoCat) contains a total of 57.7012 records, documented in 8157 bibliographic references. It includes 3135 chromosome number reports from the territories covered by the Flora dels Països Catalans (Bolòs et al., 2005), representing 27,7% of the total number of taxa (species and subspecies). The database is available through the Flora module of the Banc de Dades de Biodiversitat de Catalunya (http://biodiver.bio.ub.es/biocat/) CromoCat began gathering cytogenetic information in 1999 and, at the end of 2015, the data corresponding to Catalonia (currently an autonomous region within Spain) included 604 taxa, about 14,4% of the vascular flora (a much lower coverage than other regions as Valencian Country, Aragon Strip or Balearic Islands). The oldest recorded chromosome numbers belong to Diplotaxis erucoides (2n = 14) and dates back from 1926. Silene ciliata (Caryophyllaceae) is the species with the highest reported number (2n = c.228), whereas Comastoma tenellum (Gentianaceae) bear the lowest count (2n = 10). A total of 134 different numbers and cytotypes have been recorded. The geographic distribution of chromosome data is heterogeneous: while Barcelona and Girona provinces show low count percentages (13,15 % and 16,55 %, respectively), a more substantial part comes from Tarragona (33,02 %) and mainly Lleida (37,28 %). The distribution by county (=”comarca”) reveals that the greatest karyological diversity and intensity of chromosomic exploration corresponds to the Pyrenees, followed by the Ebre Delta and Ports Massif. These data also coincide with the concentration of endemic species. Concerning the taxonomic representation of the data stored in CromoCat, the genus with more counts from Catalan populations is Bromus (Poaceae) with 115 reports, followed by Campanula (Campanulaceae), with 72 (data explained by the amount of information included in several Ph.D.). The distribution of counts by botanical families places the Poaceae in the first rank (171 species with chromosome data), followed by Compositae (135). Combining chromosome reports from Catalan and foreign populations, only 215 taxa (4,44%) still remain karyologically unknown. This limited pack identifies the needs for further research where 3 main groups (c. 1/3 each) can be recognized: a) complex genera, 74 taxa (Alchemilla, Hieracium and Rubus); b) taxonomically unresolved, 40 taxa (but waiting for a revised thesaurus of the Catalan flora, ongoing) and c) 83 taxa truly not counted (or count not captured by CromoCat), some of them endemic .