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A MOLECULAR APPROACH TO THE ROLE OF HISTORICITY IN EVOLUTION. I. EXPERIMENTAL DESIGN WITH ENZYME POLYMORPHISM IN DROSOPHILA MELANOGASTER
Author(s) -
Merçot H.
Publication year - 1985
Publication title -
evolution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.84
H-Index - 199
eISSN - 1558-5646
pISSN - 0014-3820
DOI - 10.1111/j.1558-5646.1985.tb00423.x
Subject(s) - biology , historicity (philosophy) , drosophila melanogaster , locus (genetics) , genetics , evolutionary biology , gene , replicate , politics , political science , law , statistics , mathematics
I investigate the role of the past history (characterized by two inverse sequences of three environments) experienced by Drosophila melanogaster populations, on the allozyme frequencies at four loci ( α‐Gpdh, Adh, Est‐6, Pgm ) in a common and constant final environment. The only locus for which an effect of past history was detected is Adh . Although not unambiguous, this result is discussed in terms of interactions between this locus and other polymorphic loci. For Est‐6 and Pgm , no influence of past history was seen. As for α‐Gpdh , the substantial heterogeneity between replicate populations belonging to the same historical series is probably due to a hitch‐hiking effect of genes surrounding this locus. More generally, the role of historicity (i.e., the factors originating from the past history of a population and being accountable for its contemporary evolution) in creating genetic diversity between populations and among species is discussed.