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Chromosome numbers in the genus Pentaschistis (Poaceae, Danthonieae)
Author(s) -
Du Plessis Henriette,
Spies Johan J.
Publication year - 1992
Publication title -
taxon
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 81
eISSN - 1996-8175
pISSN - 0040-0262
DOI - 10.2307/1222396
Subject(s) - ploidy , biology , chromosome , poaceae , genus , taxon , botany , meiosis , chromosome number , zoology , genetics , karyotype , gene
Summary Du Plessis, H. & Spies, J. J.: Chromosome numbers in the genus Pentaschistis (Poaceae, Danthonieae). ‐ Taxon 41: 709‐720. 1992. ‐ ISSN 0040‐0262. On the basis of a study of meiosis, new chromosome counts are reported for 7 of the 68 species of the genus Pentaschistis . Two different basic chromosome numbers are present in the genus, i.e. 7 and 13. Polyploidy is frequently observed and B‐chromosomes are present in some species, and existing data summarised. First chromosome numbers are reported for P. argentea ( n = 21), P. aurea subsp. aurea ( n = 7), P. capillaris (n = 7), P. curvifolia (n = 7), P. papillosa (n = 7), P. tortuosa (n = 7) and P. triseta (n = 7). Additionly two new ploidy levels, diploid and heptaploid, are described for P. eriostoma .