More stories

  • in

    Population genetic patterns in an endangered island perennial

    Oceanic islands are of particular importance for the conservation of global diversity. Rare island plants with small population sizes and unique genetic patterns resulting from prolonged evolutionary isolation are usually extremely fragile. Therefore, research dedicated to conservation of these plants should consider threat factors, population structure and genetic diversity to enable the development of scientifically […] More

  • Flower of Iris atropurpurea in NET population and distribution map of I. atropurpurea.

    Intra-species ecological divergence in irises

    Speciation is often described as a continuum, from minor divergence of populations to complete reproductive isolation between species. Within-species population divergence can shed light on the first steps of speciation and the mechanisms underlying it. Yardeni et al. show that ecological divergence of Iris atropurpurea populations is associated with partial reproductive isolation. They find no […] More

  • Iris lutescens

    Spatial distribution of genetic variation in the flower colour polymorphic Iris lutescens

    Flower colour polymorphism in plants had been used as a classic model for understanding the importance of neutral processes versus natural selection in population differentiation. Iris lutescens (Iridaceae) is a widespread species in the northern Mediterranean basin, which shows a stable and striking purple–yellow flower colour polymorphism. Using an extensive sampling over the distribution range […] More

  • Wild carrot

    Gene dispersal in wild carrot populations

    How far can a gene disperse? Historical and contemporary gene dispersal can be estimated from spatial genetic structure and paternity analysis, and Rong et al. (pp. 285–296) find that an estimate of gene flow in Daucus carota ssp. carota based on contemporary pollen dispersal is much larger than an estimate of historical flow. The results […] More