Conservation genetic assessment of four plant species in a small replica of a steppe ecosystem >30 years after establishment

  title={Conservation genetic assessment of four plant species in a small replica of a steppe ecosystem >30 years after establishment},
  author={Christina Magdalena M{\"u}ller and Bj{\"o}rn Huwe and Volker Wissemann and Jasmin Joshi and Birgit Gemeinholzer},
  journal={Biodiversity and Conservation},
  pages={2699 - 2716}
To counter species loss living ex situ collections in botanic gardens became important elements of robust conservation programs. Several limitations, problems, and risks associated with living ex situ collections have been reported such as appropriate cultivation management to maintain genetic diversity and stochastic effects in small isolated populations in artificial habitats. However, not all small and isolated populations exhibit these predicted genetic changes. In a multi-species in situ… 

Meta‐analysis of genetic representativeness of plant populations under ex situ conservation in contrast to wild source populations

  • Xinzeng WeiM. Jiang
  • Environmental Science
    Conservation biology : the journal of the Society for Conservation Biology
  • 2020
The results suggest that current ex-situ plant collections do not effectively capture the genetic variation of wild populations, and it is necessary to employ more thorough sampling strategies in future collecting efforts and to add new individuals where needed.



Ex situ cultivation affects genetic structure and diversity in arable plants.

To assess whether ex situ cultivation affects genetic diversity of annuals, five annual arable species with similar breeding systems were assessed with 42 in situ populations being compared to 20 ex situ populations using a random amplified polymorphic DNA (RAPD) analysis approach.

Influence of Habitat Patchiness on Genetic Diversity and Spatial Structure of a Serpentine Endemic Plant

The findings suggest that plant conservation strategies must take into account the natural distribution of populations, and the effects of habitat fragmentation on C. collina and other plant species that occur naturally in small, discrete patches may be unlike those that have been documented in more recently fragmented species.

Domestication and the distribution of genetic variation in wild and cultivated populations of the Mesoamerican fruit tree Spondias purpurea L. (Anacardiaceae)

Levels of genetic variation in cultivated S. purpurea populations are significantly less than variation found in wild populations, although the amount of diversity varies in different agricultural habitats, and results suggest that S. Purpurea was domesticated in two distinct regions within Mesoamerica.

Rapid genetic differentiation between ex situ and their in situ source populations: an example of the endangered Silene otites (Caryophyllaceae)

The high genetic differentiation and loss of genetic diversity during spatial and temporal isolation in the ex situ populations can be attributable to small population sizes and unconscious selection during cultivation, therefore, adequate sampling prior to ex situ cultivation and large effective population sizes are important to preserve genetic diversity.

Comparative molecular studies on the genetic diversity of an ex situ garden collection and its source population of the critically endangered polish endemic plant Cochlearia polonica E. Fröhlich

Ex situ conservation resulted in a decrease of the species’ genetic diversity, implying that the artificial population only partly represents the primary genetic variability found in the source population, and suggested differences in genetic composition of the analyzed populations.

Genetic consequences of habitat fragmentation in plant populations: susceptible signals in plant traits and methodological approaches

It is concluded that current conservation efforts in fragmented habitats should be focused on common or recently rare species and mainly outcrossing species and outline important issues that need to be addressed in future research on this area.

Genetic diversity of barley landrace accessions (Hordeum vulgare ssp. vulgare) conserved for different lengths of time in ex situ gene banks

Genetic diversity levels were assessed for morphological and isozyme markers within gene bank accessions of two barley landraces from Syria that had been stored for 10, 40 and 72 years, and it was estimated that the effective population size of rejuvenation populations over their period in storage was only 4.7.