Uniqueness and multiplicity of clines in an environmental pocket.
Theor Popul Biol
; 130: 106-131, 2019 12.
Article
em En
| MEDLINE
| ID: mdl-31306667
ABSTRACT
The number of clines (i.e., polymorphic equilibria) maintained by a step-environment in a unidimensional pocket at a single diallelic locus is investigated. The monoecious population is locally panmictic; its density is uniform. Migration and viability selection are both weak; the former is homogeneous and symmetric; the latter is directional and usually specified by a unimodal function f(p) of the gene frequency p. If the ratio of the selection intensity to the migration rate exceeds a critical value, at least one cline exists. The general theorems on equilibrium structure determine it in detail for many classes of f(p), including the cubic for frequency-independent selection. Numerical examples demonstrate that for suitable f(p), many equilibria can occur simultaneously.
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Base de dados:
MEDLINE
Assunto principal:
Seleção Genética
/
Frequência do Gene
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article