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INTERPRETING THE EVOLUTION OF A TRIAZINE‐RESISTANT POPULATION OF POA ANNUA L.
Author(s) -
DARMENCY H.,
GASQUEZ J.
Publication year - 1983
Publication title -
new phytologist
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.742
H-Index - 244
eISSN - 1469-8137
pISSN - 0028-646X
DOI - 10.1111/j.1469-8137.1983.tb03496.x
Subject(s) - biology , triazine , heterozygote advantage , locus (genetics) , poa annua , esterase , genetics , population , genotype , polymorphism (computer science) , gene , botany , enzyme , biochemistry , chemistry , demography , poaceae , sociology , polymer chemistry
SUMMARY The frequency of esterase isozyme genotypes was analysed both in a triazine‐resistant population and in susceptible populations. The main findings were (i) a low polymorphism, (ii) a high rate of heterozygotes at one particular locus; this polymorphism being related to the growth form, (iii) a higher proportion of prostrate plants then would usually be expected in an open habitat. This genetic structure could result from a recent founder event in a triazine‐treated area followed by an increase of polymorphism through gene migration from adjacent populations. The importance of environmental conditions (other than triazine treatments) on the evolution of populations is discussed.