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DNA CONTENT AND EVOLUTION IN THE MICROSERIDINAE
Author(s) -
Price H. James,
Bachmann Konrad
Publication year - 1975
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.1537-2197.1975.tb12352.x
Subject(s) - biology , nuclear dna , ploidy , tribe , perennial plant , botany , inbreeding , dna , range (aeronautics) , zoology , genetics , mitochondrial dna , gene , demography , population , materials science , sociology , anthropology , composite material
Relative 2C nuclear DNA contents were microphotometrically determined from nuclei isolated from eight species of Microseris , four species of Agoseris , and Phalacroseris Bolanderi. The thirteen species are diploid (2n = 18) western North American members of the subtribe Microseridinae, tribe Cichorieae, of the family Compositae. A 7.7‐fold variation in DNA content was detected. Phalacroseris has the highest DNA content and Agoseris heterophylla has the lowest. Within the genera Microseris and Agoseris , a 2.8‐ and 3.1‐fold range in DNA content was detected. The higher values were from perennial species, and the lower values were from annual inbreeding species. Both evolutionary increases and decreases in nuclear DNA content have apparently occurred during the differentiation of the subtribe.