The spatial genetic structure of cytoplasmic (cpDNA) and nuclear (allozyme) markers within and among populations of the gynodioecious Thymus vulgaris (Labiatae) in southern France.

摘要: Recent advances in molecular biology have allowed the development of techniques to contrast spatial differentiation nuclear and cytoplasmic genes thus provide important data on relative levels gene flow by pollen seed higher plants. In this paper, we compare structure (allozymes) (cpDNA) among populations gynodioecious Thymus vulgaris southern France. Based a combination three restriction enzymes (CfoI, EcoRV, PstI), eight chlorotypes (combination enzyme patterns revealed Southern hybridization Beta cpDNA) were identified 13 studied populations. One chlorotype was particularly abundant detected nearly all Only one specific single population. Up four different observed some An F ST 0.238 (P , 0.002) for cpDNA haplotypes indicates Similar found within young population (CAB) structured patches surrounded continuous cover T. where FST is 0.546 0.002). No significant correlation between sex nor diversity female frequency detected. Allozyme markers showed markedly less (FST 5 0.021 0.019 CAB population, P 0.001). This difference allozyme suggests that dispersal more than both