Premium
On the mode of selection in Escherichia coli
Author(s) -
Kosuda Kazuhiko
Publication year - 1981
Publication title -
population ecology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.819
H-Index - 59
eISSN - 1438-390X
pISSN - 1438-3896
DOI - 10.1007/bf02515638
Subject(s) - biology , escherichia coli , auxotrophy , selection (genetic algorithm) , genotype , competition (biology) , simple (philosophy) , genetics , ecology , gene , artificial intelligence , computer science , philosophy , epistemology
Summary Competition experiments between a lac + prototroph and a lac − auxotroph of Escherichia coli were conducted by serial transfer procedure on four levels of sugar concentration. Changes of the relative frequencies of both genotypes were followed and the relative fitness was estimated. Fitness was proved to be density‐dependent. No explicit dependence of fitness upon genotype frequencies could be detected by the simple method of Kosuda (1981).