CHROMOSOME NUMBERS OF SOME WESTERN CANADIAN PLANTS

1966 ◽  
Vol 44 (8) ◽  
pp. 1093-1103 ◽  
Author(s):  
Roy L. Taylor ◽  
Ronald P. Brockman
Keyword(s):  
Chromosome Numbers ◽  
Western Canada ◽  
First Time

Chromosome numbers are presented for 97 taxa of western Canada. A total of 33 are reported for the first time, and of these, the chromosome numbers given for Xerophyllum(Liliaceae), n = 15, Menziesia (Ericaceae), n = 13, and Physostegia (Labiatae), n = 19, are the first for these genera. A brief discussion is given for a few of the taxa.

Triploidy in the genus Antennaria (Asteraceae: Inuleae)

1984 ◽  
Vol 26 (2) ◽  
pp. 133-136 ◽  
Author(s):  
C. C. Chinnappa
Keyword(s):  
Chromosome Numbers ◽  
Western Canada ◽  
Naturally Occurring ◽  
First Time ◽  
Antennaria Microphylla

Chromosome numbers for individuals from 87 populations of Antennaria from western Canada were counted. Naturally occurring triploid (2n = 42) hybrid populations between diploid (2n = 28) Antennaria microphylla Rydb. and two tetraploid (2n = 56) species Antennaria rosea Greene and Antennaria umbrinella Rydb. are reported for the first time. With the discovery of the triploid populations, an entire euploid series (2x–8x) has been established for the genus Antennaria.Key words: polyploidy, Antennaria, hybridization, agamospermy, taxonomy.

scholarly journals Morphological, Anatomical and Cytological Studies of some Moss Species from Nigeria

2017 ◽  
Vol 9 (3) ◽  
pp. 404-413
Author(s):  
Abolade Oluremi BOLAJI ◽  
Julius Olaoye FALUYI
Keyword(s):  
Chromosome Numbers ◽  
Taxonomic Status ◽  
Knowledge Gaps ◽  
Moss Species ◽  
Anatomical Studies ◽  
First Time

Morphological, anatomical and chromosome studies of Hyophila crenulata C, Mull. Ex Dus, Thuidium gratum (P. Beauv) Jaeg., Barbula lambarenensis P. Vard.. Stereophyllum nitense Mitt. and Bryum coronatum Schwaegr from Nigeria, were carried out with a view to bridging some knowledge gaps that exist in their characterization and providing insightful information that could be useful in elucidating their taxonomic status. The morphological and anatomical studies revealed several gametophytic and sporophytic attributes which have not been previously reported and which were diagnostic for the moss species studied. The chromosome studies revealed the chromosome numbers to be Hyophila crenulata n = 4; Thuidium gratum n = 12 (10 + 2 m); Barbula lambarenensis n = 3; Stereophyllum nitense n = 9; and Bryum coronatum n = 10. The study concluded that the details of the morphological and anatomical descriptions as well as the chromosome numbers being reported for the first time in this study for the moss species studied could be very useful in their identification and taxonomic delimitation.

scholarly journals New Contribution to the Knowledge on the Chromosome Numbers of Turkish Cerambycidae (Coleoptera)

2021 ◽  
Vol 69 (2) ◽  
pp. 93-99
Author(s):  
Yavuz Koçak ◽  
Elmas Yağmur
Keyword(s):  
Chromosome Number ◽  
Sex Determination ◽  
Chromosome Numbers ◽  
Chromosome Count ◽  
Chromosomal Number ◽  
The Poor ◽  
Karyological Data ◽  
First Time

Information on the karyotypes of Turkish species of Cerambycidae is scanty. Our study contributes to the knowledge of the karyological data (chromosomal number and mechanism of sex determination) of five Turkish longicorn beetles; karyotypes of four taxa, one endemic, are described for the first time and for the remaining one, Purpuricenus budensis (Götz, 1783), the previously published chromosome count is confirmed. The chromosome number of Purpuricenus desfontainii inhumeralis Pic, 1891 and Purpuricenus budensis (Götz, 1783) (Cerambycinae, Trachyderini) was found to be 2n = 28 (13 + Xyp); Clytus rhamni Germar, 1817 and Plagionotus floralis (Pallas, 1773) (Cerambycinae, Clytini) 2n = 20 (9 + Xyp); and the endemic Dorcadion triste phrygicum Peks, 1993 (Lamiinae, Dorcadionini) 2n = 24 (11 + Xyp). In view of the paucity of data available until now, our study is important for both to improve the poor karyological knowledge of Turkish Cerambycidae and to provide an incentive for other researchers.

Chromosome studies on African plants. 9. Chromosome numbers in Ehrharta (Poaceae: Ehrharteae)

Bothalia ◽  
1989 ◽  
Vol 19 (1) ◽  
pp. 125-132 ◽  
Author(s):  
J. J. Spies ◽  
E. J. L. Saayman ◽  
S. P. Voges ◽  
G. Davidse
Keyword(s):  
Chromosome Number ◽  
Ploidy Level ◽  
Chromosome Numbers ◽  
Basic Chromosome Number ◽  
B Chromosomes ◽  
Basic Chromosome ◽  
Cytogenetic Studies ◽  
African Plants ◽  
First Time

Cytogenetic studies of 53 specimens of 14 species of the genus  Ehrharta Thunb. confirmed a basic chromosome number of 12 for the genus. Chromosome numbers for 13 species are described for the first time. The highest ploidy level yet observed in the genus (2n = lOx = 120) is reported for E. villosa var.  villosa. B chromosomes were observed in several specimens of four different species.

A contribution to the taxonomy of the genus Rhaponticoides (Asteraceae, Cardueae)

Phytotaxa ◽  
2019 ◽  
Vol 422 (1) ◽  
pp. 9-32 ◽  
Author(s):  
KAZEM NEGARESH
Keyword(s):  
Chromosome Numbers ◽  
Full Description ◽  
New Combinations ◽  
First Time

A taxonomic synopsis of the genus Rhaponticoides is presented. Rhaponticoides kultiassovii, R. lasiopoda, R. phyllopoda, R. androssovii, R. gontscharovii, R. alaica, R. modesti, R. ruthenica var. bipinnatifida, R. sect. Vicentinae, R. sect. Africanae, R. sect. Turkestanicae and R. sect. Aralocaspicae are proposed as new combinations. Full description for R. sect. Vicentinae, R. sect. Africanae, R. sect. Turkestanicae and R. sect. Aralocaspicae and a key for all sections are presented for the first time here. My previous descriptions of R. sect. Iranicae and R. sect. Ruthenicae are revised. Two names, R. kultiassovii and R. lasiopoda, are typified. In addition, type details, full descriptions, morphological comparisons, distribution and habitat of transferred taxa are given. Finally, a new list of species of the genus Rhaponticoides with their heterotypic synonyms, geographical distributions and chromosome numbers is provided.

Chromosome numbers in some mosses from western Canada

1983 ◽  
Vol 61 (9) ◽  
pp. 2384-2387
Author(s):  
Helen P. Ramsay
Keyword(s):  
British Columbia ◽  
Chromosome Numbers ◽  
First Record ◽  
Western Canada ◽  
Moss Species ◽  
New Localities ◽  
Bryum Pseudotriquetrum ◽  
Dicranum Scoparium

Chromosome numbers are reported for six moss species from western Canada, four from British Columbia, two from Alberta. These give data on chromosome numbers from new localities in Canada for populations of five species and the first record for Kiaeria starkei from Canada. Chromosome numbers reported are n = 13, Grimmia afftnis; n = 14, Kiaeria starkei; n = 14 (13 + m), Dicranum scoparium; n = 20, Bryum pseudotriquetrum; n = 11, Ptilium crista-castrensis; and n = 6, Hypnum circinale.

Chromosome numbers in Impatiens (Balsaminaceae)

1984 ◽  
Vol 62 (12) ◽  
pp. 2630-2635 ◽  
Author(s):  
A. E. Zinov'eva-Stahevitch ◽  
W. F. Grant
Keyword(s):  
Chromosome Number ◽  
Chromosome Numbers ◽  
First Record ◽  
Hybrid Origin ◽  
Putative Hybrid ◽  
South Indian ◽  
First Time

Chromosome numbers were determined for 44 taxa of Impatiens. Ten of these are reported for the first time, of which one is the first record for a species native to Borneo. Chromosome numbers ranged from n = 3 to n = 24. Three new dysploid cytotypes were observed. A chromosome number of n = 17, previously recorded only from Thailand and Malaysia, was found in a South Indian taxon whose putative hybrid origin is discussed. The frequency of the different chromosome numbers occurring in the genus (n = 3 to n = 33) is summarized and dysploidy and polyploidy are discussed.

scholarly journals Circumnutation in the growth of Chara rhizoids

2014 ◽  
Vol 58 (2) ◽  
pp. 163-177 ◽  
Author(s):  
Janina Dąbrowska
Keyword(s):  
Chromosome Numbers ◽  
Tetraploid Form ◽  
First Time ◽  
Chara Rhizoids

The chromosome numbers of 24 species of <em>Achillea L. </em>were determined, among them 4 for the first time <em>(A. chamaemelifolia, A. sulphurea, A. teretifolia, A. vermicularis). </em>A tetraploid form of <em>A. lingulata </em>was found for the first time. The occurrence of di- and tetraploid forms <em>of A. crithmifolia </em>and <em>A. setacea </em>is confirmed as are tetraploid forms of <em>A. asiatica </em>and <em>A. sibirica. </em>Attention is drawn to 7 species of <em>Achillea L. </em>occurring in two forms, di- and tetraploid, and the significance of this fact is discussed.

scholarly journals Molecular cytogenetics of Hedysarum gmelinii Ledeb. and H. setigerum Turcz. (Fabaceae) from populations of Southern Siberia

2021 ◽  
Vol 20 (1) ◽  
pp. 517-519
Author(s):  
O. Yu. Yurkevich ◽  
T. E. Samatadze ◽  
I. Yu. Selyutina ◽  
S. A. Zoshchuk ◽  
A. V. Amosova ◽  
...  
Keyword(s):  
Chromosome Numbers ◽  
Related Species ◽  
Karyotype Analysis ◽  
Molecular Cytogenetics ◽  
5S Rdna ◽  
Chromosome Morphology ◽  
Closely Related Species ◽  
Southern Siberia ◽  
Close Relationship ◽  
First Time

For the first time, a comparative karyotype analysis of closely related species Hedysarum gmelinii andH. setigerum (Hedysarum section Multicaulia) grown in Southern Siberia, has been performed by molecular cytogeneticmarkers. Chromosome numbers in karyotypes of these species were specified – 2n = 4х = 32. In some accessions, additionalB chromosomes were revealed. FISH analyses indicated high similarities in chromosome morphology and also patternsof chromosomal distributions of 45S and 5S rDNA clusters in karyotypes of H. gmelinii and H. setigerum, which confirmsthe close relationship between their genomes.

scholarly journals Chromosome numbers in some alien plant species of Novosibirsk Region: post II

Turczaninowia ◽  
2021 ◽  
Vol 24 (2) ◽  
pp. 12-18
Author(s):  
Elena Yu. Zykova ◽  
Tatyana V. Pankova (An’kova)
Keyword(s):  
Alien Species ◽  
Plant Species ◽  
Chromosome Numbers ◽  
General Distribution ◽  
Alien Plant Species ◽  
Alien Plant ◽  
Nepeta Cataria ◽  
Novosibirsk Region ◽  
First Time

Chromosome numbers (2n) for 12 alien species (Apiaceae, Asteraceae, Brassicaceae, Campanulaceae, Fabaceae, Lamiaceae, Malvaceae, Onagraceae, Poaceae, Polygonaceae) from the Novosibirsk Region are given. For the first time for Russia, the number of chromosomes of Xanthogalum purpurascens (2n = 22) is given, for Siberia – Nepeta cataria (2n = 34), Malva pusilla (2n = 42) and Koenigia weyrichii subsp. weyrichii (2n = 20). For all studied species, short information on the general distribution and dispersal in the Novosibirsk Region, literature data on the number of chromosomes from the territory of Russia are presented.

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