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KARYOTYPES OF EASTERN NORTH AMERICAN PHLOX
Author(s) -
Smith Dale M.,
Levin Donald A.
Publication year - 1967
Publication title -
american journal of botany
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.218
H-Index - 151
eISSN - 1537-2197
pISSN - 0002-9122
DOI - 10.1002/j.1537-2197.1967.tb06927.x
Subject(s) - biology , karyotype , ploidy , botany , taxon , chromosome number , chromosome , evolutionary biology , zoology , genetics , gene
The karyotypes of 32 Phlox taxa were studied in many plants representative of populations found throughout eastern North America. Most plants were diploid with 2 n = 14, but a few tetraploids and plants with B‐chromosomes were also observed. Some species were virtually indistinguishable karyotypically, while others differed. Within and between the Subsections Speciosae, Divaricatae , and Subulatae , strikingly similar karyotypes were observed. Other Subsections differed significantly, with the Ovatae showing strong intrasubsectional variation. Increased karyotype asymmetry is correlated with morphological specialization. Where polyploidy was observed, discordant chromosome sets indicated allopolyploidy.