Chromosome Numbers and Evolutionary Patterns in the Aster Occidentalis (Asteraceae) Polyploid Complex of Western North America

Brittonia ◽  
1983 ◽  
Vol 35 (3) ◽  
pp. 189 ◽  
Author(s):  
Milton L. Dean ◽  
Kenton L. Chambers
Keyword(s):  
North America ◽  
Chromosome Numbers ◽  
Western North America ◽  
Polyploid Complex ◽  
Evolutionary Patterns

Chromosome numbers in Antennaria (Asteraceae:Inuleae) from western North America

1986 ◽  
Vol 28 (3) ◽  
pp. 468-475 ◽  
Author(s):  
C. C. Chinnappa
Keyword(s):  
North America ◽  
Chromosome Numbers ◽  
Entire Range ◽  
Western North America ◽  
Polyploid Complex ◽  
Polyploid Species ◽  
Ploidy Levels ◽  
Putative Hybrids

Chromosome numbers were determined for 26 taxa of Antennaria from western North America. These were found to include diploid and polyploid species and their putative hybrids. First counts are reported for A. stenophylla (2n = 28) and A. sedoides (2n = 56). Four polyploid complexes, the A. rosea, A. alpina, A. neodioeca, and A. parvifolia aggregates, were found to have sporophytic chromosomes numbers which included all ploidy levels from diploid (2n = 28) to decaploid (2n = 140). This represents the entire range of euploidy known to occur in the genus. Much of the variation that is encountered in the species of Antennaria is the result of extensive hybridization between diploid and polyploid populations comprised of sexual and partially apomictic individuals, respectively.Key words: Asteraceae, Antennaria, dioecy, agamospermy, polyploid complex.

Chromosome Numbers in Some Cacti of Western North America-VIII

Haseltonia ◽  
2009 ◽  
Vol 15 ◽  
pp. 117-134 ◽  
Author(s):  
Marc A Baker ◽  
Jon P Rebman ◽  
Bruce D Parfitt ◽  
Donald J Pinkava ◽  
Allan D Zimmerman
Keyword(s):  
North America ◽  
Chromosome Numbers ◽  
Western North America

Chromosome Numbers in Some Cacti of Western North America-III

1977 ◽  
Vol 104 (2) ◽  
pp. 105 ◽  
Author(s):  
Donald J. Pinkava ◽  
Lyle A. McGill ◽  
Timothy Reeves
Keyword(s):  
North America ◽  
Chromosome Numbers ◽  
Western North America

New chromosome numbers and remarks on theAchillea millefolium polyploid complex in North America

1973 ◽  
Vol 122 (3) ◽  
pp. 133-143 ◽  
Author(s):  
Friedrich Ehrendorfer
Keyword(s):  
North America ◽  
Chromosome Numbers ◽  
Polyploid Complex

STUDIES ON SOLIDAGO L.: IV. THE CHROMOSOME NUMBERS OF CERTAIN TAXA OF THE GENUS SOLIDAGO

1959 ◽  
Vol 37 (2) ◽  
pp. 209-228 ◽  
Author(s):  
Jean R. Beaudry ◽  
Denise L. Chabot
Keyword(s):  
North America ◽  
Chromosome Number ◽  
Geographical Distribution ◽  
Chromosome Numbers ◽  
Morphological Characters ◽  
Basic Number ◽  
Western North America

The authors report the chromosome numbers of 25 taxa of the genus Solidago which had not yet been studied from this standpoint, and review the literature. The chromosome numbers of 42 taxa have now been published. The basic number of the genus is nine. Thirty-three taxa are diploid (2n = 18), five are tetraploid (2n = 36), three are aggregate taxa containing both diploid and tetraploid cytodemes, and one is hexaploid (2n = 54). Polyploidy has thus contributed to the evolution of the genus Solidago but it seems that most of the species have differentiated gradually. S. decemflora DC. of western North America differs from S. nemoralis Ait. of the same continent by morphological characters, its geographical distribution, and its chromosome number, the first taxon being tetraploid and the second diploid; the two are thus good species and not only varieties of the same species. The S. rigida of authors is an aggregate made up of two entities which are distinguished not only by their morphology and geographical distribution but also by their chromosome numbers; the eastern one (S. rigida L.) is tetraploid, whereas the western one (S. parvirigida Beaudry) is diploid. The bog and marsh goldenrods, S. Purshii and S. uliginosa, also possess different chromosome numbers, the first being diploid and the second tetraploid.

Hybridization Studies in the Aster Occidentalis (Asteraceae) Polyploid Complex of Western North America

Brittonia ◽  
1983 ◽  
Vol 35 (4) ◽  
pp. 353 ◽  
Author(s):  
Geraldine A. Allen ◽  
Milton L. Dean ◽  
Kenton L. Chambers
Keyword(s):  
North America ◽  
Western North America ◽  
Polyploid Complex

Chromosome Numbers in Some Cacti of Western North America

Brittonia ◽  
1971 ◽  
Vol 23 (2) ◽  
pp. 171 ◽  
Author(s):  
Donald J. Pinkava ◽  
Malcolm G. McLeod
Keyword(s):  
North America ◽  
Chromosome Numbers ◽  
Western North America

Chromosome Numbers in Some Cacti of Western North America-II

Brittonia ◽  
1973 ◽  
Vol 25 (1) ◽  
pp. 2 ◽  
Author(s):  
D. J. Pinkava ◽  
M. G. McLeod ◽  
L. A. McGill ◽  
R. C. Brown
Keyword(s):  
North America ◽  
Chromosome Numbers ◽  
Western North America

Chromosome Numbers in Some Cacti of Western North America. IV.

1982 ◽  
Vol 109 (2) ◽  
pp. 121 ◽  
Author(s):  
Donald J. Pinkava ◽  
Bruce D. Parfitt
Keyword(s):  
North America ◽  
Chromosome Numbers ◽  
Western North America

Chromosome Numbers in Some Cacti of Western North America — IX

Haseltonia ◽  
2018 ◽  
Vol 2018 (25) ◽  
pp. 5 ◽  
Author(s):  
Marc A. Baker ◽  
Donald J. Pinkava
Keyword(s):  
North America ◽  
Chromosome Numbers ◽  
Western North America
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