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CHEMOSYSTEMATIC AND NUMERICAL STUDIES OF NATURAL POPULATIONS OF JUNIPERUS ASHEI BUCH. †
Author(s) -
Adams R. P.,
Turner B. L.
Publication year - 1970
Publication title -
taxon
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 81
eISSN - 1996-8175
pISSN - 0040-0262
DOI - 10.2307/1219286
Subject(s) - biology , taxonomy (biology) , numerical taxonomy , systematics , divergence (linguistics) , botany , population , terpenoid , ecology , linguistics , philosophy , demography , sociology
Summary Juniperus ashei Buch. was analyzed throughout its Texas distribution for areas of population differentiation and possible hybridization with J. virginiana L. and J. pinchotii Sudw. utilizing both morphological and chemical (terpenoid) characters. The volatile terpenoids of the foliage were analyzed by gas chromatography. Numerical methods included: analysis of variance; SNK tests; contour mapping of individual characters; differential systematics; and numerical taxonomy. Some peripheral populations of J. ashei show divergence of both terpenoid and morphological characters. This divergence is not, apparently, due to hybridization with J. virginiana or J. pinchotii . No evidence of hybridization was detected between J. ashei and J. virginiana or J. pinchotii . Differential systematics and numerical taxonomy were found to be of considerable value in the analysis of infraspecific variation.