Analysis of spatial genetic structure in an expanding Pinus halepensis population reveals development of fine-scale genetic clustering over time

D. Troupin, R. Nathan, G. G. Vendramin

Research output: Contribution to journalArticlepeer-review

68 Scopus citations

Abstract

We analysed the change of spatial genetic structure (SGS) of reproductive individuals over time in an expanding Pinus halepensis population. To our knowledge, this is the first empirical study to analyse the temporal component of SGS by following the dynamics of successive cohorts of the same population over time, rather than analysing different age cohorts at a single time. SGS is influenced by various factors including restricted gene dispersal, microenvironmental selection, mating patterns and the spatial pattern of reproductive individuals. Several factors that affect SGS are expected to vary over time and as adult density increases. Using air photo analysis, tree-ring dating and molecular marker analysis we reconstructed the spread of reproductive individuals over 30 years beginning from five initial individuals. In the early stages, genotypes were distributed randomly in space. Over time and with increasing density, fine-scale (< 20 m) SGS developed and the magnitude of genetic clustering increased. The SGS was strongly affected by the initial spatial distribution and genetic variation of the founding individuals. The development of SGS may be explained by fine-scale environmental heterogeneity and possibly microenvironmental selection. Inbreeding and variation in reproductive success may have enhanced SGS magnitude over time.

Original languageEnglish
Pages (from-to)3617-3630
Number of pages14
JournalMolecular Ecology
Volume15
Issue number12
DOIs
StatePublished - 1 Oct 2006
Externally publishedYes

Keywords

  • Microenvironmental heterogeneity
  • Microsatellites
  • Pinus halepensis
  • Population expansion
  • Spatial autocorrelation
  • Spatial genetic structure

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Genetics

Fingerprint

Dive into the research topics of 'Analysis of spatial genetic structure in an expanding Pinus halepensis population reveals development of fine-scale genetic clustering over time'. Together they form a unique fingerprint.

Cite this