Blanchard Jr., Orland J.
January 2012
Rhodora;2012, Vol. 114 Issue 957, p37
Academic Journal
Kosteletzkya C. Presl includes 17 species that are about evenly distributed between Africa and the northern Neotropics. The seven species with known chromosome numbers are exclusively diploid (n 5 19). Here, 47 new chromosome counts are reported and the nomenclature of five of the earliercounted species is updated. The counts confirm chromosome numbers for six species and provide first counts for eight species. Four of the latter, all African, are tetraploids, and another African species is a hexaploid. Amphi-Atlantic distributions and polyploidy in other malvoid groups are considered. Polyploidy evidence suggests an African origin for the genus.


Related Articles

  • A new variety of Cryptocoryne versteegii (Araceae) from Irian Jaya Tengah, Indonesia. Jacobsen, Niels; Bastmeijer, Jan D.; Edwards, Peter J.; Johns, Robert J.; Takahashi, Norito; Wongso, Suwidji // Willdenowia;2014, Vol. 44 Issue 3, p385 

    A new variety, Cryptocoryne versteegii var . jayaensis N. Jacobsen, Bastm., P. J. Edwards, R. J. Johns, N. Takah. & Wongso, from the base of Mount Jaya, Irian Jaya, Indonesia, is described and illustrated. Cryptocoryne versteegii Engl. var. versteegii is a plant from the inner mangrove with...

  • Distribution and Ecology of Cytotypes of the Aster amellus Aggregates in the Czech Republic. MANDÁKOVÁ, TEREZIE; MÜNZBERGOVÁ, ZUZANA // Annals of Botany;Oct2006, Vol. 98 Issue 4, p845 

    • Background and Aims Polyploidy is viewed as an important mechanism of sympatric speciation, but only a few studies have documented patterns of distribution and ecology of different cytotypes in their contact zone. Aster amellus agg. (Asteraceae) is one of the species with documented...

  • segmental allopolyploids:. Schlegel, Rolf H. J. // Encyclopedic Dictionary of Plant Breeding & Related Subjects;2003, p372 

    A definition of the term "segmental allopolyploids" is presented, which refers to a partial homology of chromosome sets that are combined in an allopolyploid.

  • Maternal donors of polyploids in Pseudoroegneria (Poaceae: Triticeae) and related genera inferred from chloroplast trnL-F sequences.  // Turkish Journal of Biology;2010, Vol. 34 Issue 4, p335 

    No abstract available.

  • Karyotype analysis for diploid and polyploid species of the Solanum L. Melo, C.; Martins, M.; Oliveira, M.; Benko-Iseppon, A.; Carvalho, R. // Plant Systematics & Evolution;May2011, Vol. 293 Issue 1-4, p227 

    Solanum species were cytogenetically analysed to localize species-specific markers. Solanum atropurpureum Schrank, S. dulcamara L., S. gilo Raddi., S. melongena L., S. nitidibaccatum Bitter and S. paniculatum L. showed 2 n = 24, whereas S. luteum Mill., S. nigrum L. and S. laciniatum Ait. showed...

  • Ploidy levels and reproductive behaviour in natural populations of five Paspalum species. Sartor, M.; Quarin, C.; Urbani, M.; Espinoza, F. // Plant Systematics & Evolution;May2011, Vol. 293 Issue 1-4, p31 

    Knowledge of variation in ploidy levels and reproductive behaviour in natural populations is essential in order to understand the functioning of agamic complexes. The aim of this study was to analyse the ploidy level and mode of reproduction in several wild Paspalum populations. A total of 19...

  • Chromosome numbers of selected species of Elatine L. (Elatinaceae). Kalinka, Anna; Sramkó, Gábor; Horváth, Orsolya; V., Attila Molnár; Popiela, Agnieszka // Acta Societatis Botanicorum Poloniae;Winter2015, Vol. 84 Issue 4, p413 

    The paper reports chromosome numbers for 13 taxa of Elatine L., including all 11 species occurring in Europe, namely E. alsinastrum, E. ambigua, E. brachysperma, E. brochonii, E. californica, E. campylosperma, E. gussonei, E. hexandra, E. hungarica, E. hydropiper, E. macropoda, E. orthosperma,...

  • Evolution of Duplicate Gene Expression in Polyploid and Hybrid Plants. Adams, Keith L. // Journal of Heredity;Mar/Apr2007, Vol. 98 Issue 2, p136 

    Allopolyploidy is a prominent mode of speciation in flowering plants. On allopolyploidy, genomic changes can take place, including chromosomal rearrangement and changes in gene expression; these processes continue over evolutionary time. Recent studies of gene expression in polyploid and hybrid...

  • Polyploidy, alien species and invasiveness in Polish angiosperms. Góralski, Grzegorz; Judasz, Andrzej; Gacek, Paulina; Grabowska-Joachimiak, Aleksandra; Joachimiak, Andrzej // Plant Systematics & Evolution;Feb2014, Vol. 300 Issue 2, p225 

    Chromosome numbers, mainly for Polish flora, were examined in order to investigate whether such features as chromosome numbers and polyploid frequencies are correlated with a plant's origin (native vs. alien) and invasiveness. Polyploid frequencies were estimated using three methods: the 11 and...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics