scholarly journals Ex situ collections and their potential for the restoration of extinct plants

2020 ◽  
Vol 34 (2) ◽  
pp. 303-313 ◽  
Author(s):  
Thomas Abeli ◽  
Sarah Dalrymple ◽  
Sandrine Godefroid ◽  
Andrea Mondoni ◽  
Jonas V. Müller ◽  
...  
Keyword(s):  
Ex Situ ◽  
Ex Situ Collections

scholarly journals Gap analyses of priority wild relatives of food crop in current ex situ and in situ conservation in Indonesia

2021 ◽  
Author(s):  
Wiguna Rahman ◽  
Joana Magos Brehm ◽  
Nigel Maxted ◽  
Jade Phillips ◽  
Aremi R. Contreras-Toledo ◽  
...  
Keyword(s):  
Protected Areas ◽  
Protected Area ◽  
In Situ Conservation ◽  
Wild Relatives ◽  
Ex Situ ◽  
Area Network ◽  
Complementarity Analysis ◽  
Ex Situ Collections ◽  
Conservation Actions

AbstractConservation programmes are always limited by available resources. Careful planning is therefore required to increase the efficiency of conservation and gap analysis can be used for this purpose. This method was used to assess the representativeness of current ex situ and in situ conservation actions of 234 priority crop wild relatives (CWR) in Indonesia. This analysis also included species distribution modelling, the creation of an ecogeographical land characterization map, and a complementarity analysis to identify priorities area for in situ conservation and for further collecting of ex situ conservation programmes. The results show that both current ex situ and in situ conservation actions are insufficient. Sixty-six percent of priority CWRs have no recorded ex situ collections. Eighty CWRs with ex situ collections are still under-represented in the national genebanks and 65 CWRs have no presence records within the existing protected area network although 60 are predicted to exist in several protected areas according to their potential distribution models. The complementarity analysis shows that a minimum of 61 complementary grid areas (complementary based on grid cells) are required to conserve all priority taxa and 40 complementary protected areas (complementary based on existing protected areas) are required to conserve those with known populations within the existing in situ protected area network. The top ten of complementary protected areas are proposed as the initial areas for the development of CWR genetic reserves network in Indonesia. It is recommended to enhanced coordination between ex situ and in situ conservation stakeholders for sustaining the long term conservation of CWR in Indonesia. Implementation of the research recommendations will provide for the first time an effective conservation planning of Indonesia’s CWR diversity and will significantly enhance the country’s food and nutritional security.

scholarly journals Do living ex situ collections capture the genetic variation of wild populations? A molecular analysis of two relict tree species, Zelkova abelica and Zelkova carpinifolia

2014 ◽  
Vol 23 (12) ◽  
pp. 2945-2959 ◽  
Author(s):  
Camille Christe ◽  
Gregor Kozlowski ◽  
David Frey ◽  
Laurence Fazan ◽  
Sébastien Bétrisey ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Molecular Analysis ◽  
Tree Species ◽  
Ex Situ ◽  
Wild Populations ◽  
Ex Situ Collections

Ex situ collections of plants and how they adjust to ABS conditions *

2015 ◽  
pp. 207-225 ◽  
Author(s):  
Susette Biber-Klemm ◽  
Kate Davis ◽  
Laurent Gautier ◽  
Michael Kiehn ◽  
Sylvia I. Martinez
Keyword(s):  
Ex Situ ◽  
Ex Situ Collections

Key issues facing genebanks in preserving crop genetic diversity ex situ: overview of the range of challenges

2021 ◽  
pp. 139-154
Author(s):  
Paula Bramel ◽  
Keyword(s):  
Genetic Diversity ◽  
Genetic Resources ◽  
Plant Genetic Resources ◽  
Cost Effective ◽  
Ex Situ ◽  
Crop Genetic Diversity ◽  
Ex Situ Collections ◽  
Key Issues ◽  
Market Preference ◽  
The Impact

This chapter reviews the key issues and challenges facing genebanks in preserving crop genetic diversity ex situ. Local crop genetic diversity is challenged with changes in land use, urbanization, land degradation, changes in agricultural practises, availability of improved varieties, changes in market preference, and the impact of climate change. Efforts have been made to secure plant genetic resources ex situ for future use but there are significant issues related to cost effective, efficient, secure, rational, and sustainable long-term ex situ conservation. It begins by addressing issues for the composition of ex situ collections and moves on to discuss issues for routine operations for conservation. The chapter also highlights issues for the use of conserved genetic resources, before concluding with a summary of why the development of sustainable genebank systems is so important.

scholarly journals In situ and ex situ conservation gap analyses of crop wild relatives from Malawi

2020 ◽  
Author(s):  
Nolipher Khaki Mponya ◽  
Tembo Chanyenga ◽  
Joana Magos Brehm ◽  
Nigel Maxted
Keyword(s):  
Ex Situ Conservation ◽  
Plant Genetic Resources ◽  
Crop Wild Relatives ◽  
Wild Relatives ◽  
Conservation Strategy ◽  
Ex Situ ◽  
Grid Cells ◽  
Ex Situ Collections ◽  
Minimum Number

Abstract The study analysed the conservation gaps of the priority crop wild relatives (CWR) taxa for Malawi in order to contribute to the development of a harmonized conservation strategy that helps secure the priority CWR under in situ and ex situ. We used taxa distribution modelling, complementarity analysis and ecogeographic land characterization map to analyse spatial diversity and distribution of 123 priority taxa across different adaptive scenarios. We identified areas of observed and predicted richness, the minimum number of protected areas (PAs) that conserve the broadest ecogeographic diversity in situ and the minimum number of grid cells that capture highest diversity outside PAs to recommend the establishment of genetic reserves. We then analysed the representativeness of the conserved ecogeographic diversity of target taxa in ex situ collections to identify ex situ conservation gaps and advise for priority areas for ex situ collections. For the 123 taxa, 70.7% of the total diversity occurs in 36 PAs with 66.8% of the diversity captured in only 10 complementary PAs. Outside PAs, the broadest diversity was conserved in three grid cells of size 5 × 5 km. Fifty-three of 123 taxa have ex situ collections with only three taxa having ex situ collections at the Malawi Plant Genetic Resources Centre. The findings of this study will guide formulation of conservation actions for the priority taxa as well as lobbying for active conservation of the same under in situ and ex situ.

Conservation of Fruit Tree Genetic Resources and Their Use in the Breeding Process

2017 ◽  
Vol 11 (1) ◽  
pp. 66-69 ◽  
Author(s):  
Mihai Botu ◽  
Ion Botu ◽  
Gheorghe Achim ◽  
Silvia Preda ◽  
Anca Scutelnicu ◽  
...  
Keyword(s):  
Genetic Resources ◽  
Biological Diversity ◽  
Fruit Tree ◽  
Ex Situ ◽  
Convention On Biological Diversity ◽  
Sweet Chestnut ◽  
Ex Situ Collections ◽  
Fruit Growing ◽  
New Varieties ◽  
The University

Abstract Conservation of fruit tree biodiversity is important for the mankind according to the Convention on Biological Diversity. In Romania, due to favorable environmental conditions, numerous genetic resources of plum, apple, walnut, hazelnut, sweet chestnut and other fruit crops are present. Identification, evaluation and conservation of fruit genetic resources activities were launched in 1970’ in order to limit the loss of the biodiversity due to erosion and genetic vulnerability. Fruit Growing Research & Extension Station (SCDP) of Valcea, which is belonging now to the University of Craiova, was assigned to deal with conservation of genetic resources for the Prunus, Juglans, Corylus and Castanea genera. As result, national hazelnut collection, the sweet chestnut collection and a part of the plum and walnut national collections are located here. Genetic resources of Malus, Pyrus, Sambucus, Carya and Salix are hold in the active collections too. The ex situ collections include 1160 accessions, out of those 48 species, 533 cultivars and 565 other types like hybrids, biotypes, mutants, etc. Autochthonous or ‘original’ accessions include 173 local cultivars and 565 other genotypes. Breeding activity based on valuable germplasm conducted to releasing of a total number of 31 cultivars and 8 rootstocks registered in the Romanian Official Catalogue for Varieties, 15 varieties have been patented in Romania and for one by CPVO. Identification, in situ evaluation, collection, ex situ evaluation, propagation and regeneration activities regarding fruit tree genetic resources have to be continued in order to conserve the local fruit tree biodiversity and to value it through breeding and use of the new varieties in the orchards.

Genetic diversity patterns in ex situ collections of Oryza officinalis Wall. ex G. Watt revealed by morphological and microsatellite markers

2016 ◽  
Vol 64 (4) ◽  
pp. 733-744 ◽  
Author(s):  
Maria Elizabeth Boncodin Naredo ◽  
Sheila Mae Quilloy Mercado ◽  
Maria Celeste Naynes Banaticla-Hilario ◽  
Myrricar Loren Berdos ◽  
Mario Alcantara Rodriguez ◽  
...  
Keyword(s):  
Genetic Diversity ◽  
Microsatellite Markers ◽  
Ex Situ ◽  
Oryza Officinalis ◽  
Diversity Patterns ◽  
Ex Situ Collections

scholarly journals Molecular markers in the genetic analysis of crossability of bread wheat with rye

2020 ◽  
Vol 24 (6) ◽  
pp. 557-567
Author(s):  
I. V. Porotnikov ◽  
O. Yu. Antonova ◽  
O. P. Mitrofanova
Keyword(s):  
Molecular Markers ◽  
Bread Wheat ◽  
Related Species ◽  
Genetic Material ◽  
Triticum Aestivum L ◽  
Ex Situ ◽  
Wheat Gene ◽  
Ex Situ Collections ◽  
Ph1 Gene ◽  
New Varieties

Bread wheat (Triticum aestivum L.), the varieties of which are widely used for the grain production, is difficultly crossable with related species of Triticeae Dum. This factor limits the chance of introduction of alien genetic material into the wheat gene pool and the possibility of new varieties breeding with good adaptation to adverse environmental factors. The crossability between wheat and related species is controlled by Kr1-Kr4 genes (Crossability with Rye, Hordeum and Aegilops spp.) and the SKr gene (Suppressor of crossability). SKr and Kr1 have the largest influence on the trait. In the case of the recessive alleles, these genes do not function and the quantity of hybrid seeds after pollination with alien species can achieve more than 50 %. SKr is located on 5BS between the GBR0233 and Xgwm234 markers, closely linked with the markers Xcfb341, TGlc2 and gene12. Kr1 was mapped on 5BL, proximally to the Ph1 gene, between the EST-SSR markers Xw5145 and Xw9340. The markers of SKr were used to control the transfer of its recessive allele into other wheat genotypes, which made it possible to obtain highly crossable forms. However, the advantages of using the SKr and Kr1 markers in marker-assisted selection and in the screening of ex situ collections are not sufficiently studied. The published Kr1 sequence for varieties with different crossability offers great prospects, because it will be possible to create allele-specific markers. In this review, the following issues are considered: genetic resources created by wheat and rye hybridization, the geographical distribution of easy-to-cross forms of wheat, genetic control of the wheat and rye compatibility, advances of the use of molecular markers in the mapping of Kr-genes and their transmission control.

Sign in / Sign up

Export Citation Format

Share Document