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A CHROMATOGRAPHIC STUDY OF CESPITOSE ZINNIAS
Author(s) -
Torres Andrew M.,
Levin Donald A.
Publication year - 1964
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.1537-2197.1964.tb06683.x
Subject(s) - biology , polyploid , ploidy , botany , anomala , taxon , hybrid , genetics , gene
A chromatographic survey of the 7 taxa of the subg. Diplothrix ( Zinnia ‐COMPOSITAE) and several artificial hybrids was undertaken to obtain information, supplemental to that from cytogenetic and morphological studies, bearing on the ancestry of the polyploid taxa. Conclusions derived from the chemotaxonomic technique have agreed in each instance with those from other approaches. In addition, chromatographic data provided new insight into relationships among the species of the Diplothrix diplo‐polyploid complex. The n = 10 diploid species, Z. juniperifolia and Z. oliyantha, produced a chromatographic pattern designated A 1,3 ; the third diploid, Z. acerosa, produced a different pattern called the A 2 . The pattern designations conform to the genomic appellations. Tetraploid Z. acerosa and Z. citrea exhibited both patterns, and Z. grandiflora ( n = 21) and Z. anomala ( n = ca. 42) both exhibited the A 1,3 pattern only. These results substantiated the previously determined genomic relationships, and supported the hypothesis that the ancestry of Z. citrea involved Z. juniperifolia and 2 n Z. acerosa, that of 4 n Z. acerosa involved Z. oligantha and 2 n Z. acerosa, that of Z. grandiflora and Z. anomala involved Z. juniperifolia and Z. oligantha.