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THE VARIABILITY OF NUCLEAR DNA AND ITS IMPLICATIONS FOR POLYPLOIDY IN WHITE ASH (FRAXINUS AMERICANA L.: OLEACEAE)
Author(s) -
Black Candace L.,
Beckmann Robert L.
Publication year - 1983
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.1537-2197.1983.tb07932.x
Subject(s) - oleaceae , biology , fraxinus , polyploid , nuclear dna , botany , ploidy , white (mutation) , mitochondrial dna , genetics , gene
Cytophotometric studies of both mature and embryonic tissues of white ash ( Fraxinus americana L.) revealed considerable variability of nuclear DNA content in this dioecious polyploid species (2 n = 46, 92, 138). Triploid and pentaploid embryos may be produced, and mature individuals of these odd ploidy levels, in turn, may occur in natural populations. Polyploidy may have originated in this species through the union of unreduced gametes.