scholarly journals Conservarea in situ a agrobiodiversității vegetale – factor de reușită în promovarea agriculturii durabile

2021 ◽  
Author(s):  
Anatolie Ganea ◽  
Keyword(s):  
Agricultural Production ◽  
In Situ Conservation ◽  
Natural Populations ◽  
Genetic Erosion ◽  
Crop Wild Relatives ◽  
Cultivated Plants ◽  
Political Factors ◽  
Climatic Zones ◽  
The Past

The article gives brief information on inventorying of some crop wild relatives in the forest ecosystems of different soil-climatic zones of Republic of Moldova, and collection of accessions of the local forms of cultivated plants on farms. It was found that natural populations of 5 pilot species – wild cherry, wild pear, cornelian cherry, wild apple and hazelnut are degrading under the influence of envi-ronmental stresses. It is noted that the range of social-economic and political factors of the past 60-70 years has led to significant genetic erosion of the local gene pool of agricultural crops. Elaboration of the effective methods for in situ conservation of agrobiodiversity will facilitate the greening of agricultural production and introduction of the elements of sustainable agriculture.

scholarly journals NATIVE SEEDS/SEARCH: BRIDGING IN SITU AND EX SITU CONSERVATION OF NATIVE SOUTHWESTERN CROPS

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1179d-1179
Author(s):  
Gary Paul Nabhan ◽  
Mahina Drees ◽  
Kevin Dahl
Keyword(s):  
Native American ◽  
International Organizations ◽  
Ex Situ Conservation ◽  
In Situ Conservation ◽  
Genetic Erosion ◽  
Crop Wild Relatives ◽  
Wild Relatives ◽  
Ex Situ ◽  
Educational Materials

The binational Southwest remains rich in native crop land races and crop wild relatives, despite numerous pressures favoring genetic erosion. Native Seeds/SEARCH is promoting in situ conservation in traditional Indian fields and nearby wild habitats, but also maintains a gene bank as a back-up, to allow future reintroductions. Seeds are distributed to Native American communities for free, and their value is reinforced through a variety of educational materials and presentations. Our regional focus allows us to serve as an effective bridge between in situ and ex situ conservationists, between Indian and international organizations, and between tribes. Methods, ethics and accomplishments to date will be highlighted.

scholarly journals Recommendations for the conservation of the wild onions (Allium) gene pool in the Northwestern Federal District of Russia

VAVILOVIA ◽  
2021 ◽  
Vol 3 (4) ◽  
pp. 23-33
Author(s):  
L. Yu. Shipilina
Keyword(s):  
Plant Genetic Resources ◽  
In Situ Conservation ◽  
Federal District ◽  
Crop Wild Relatives ◽  
Cultivated Plants ◽  
Important Species ◽  
Priority Method ◽  
Materials Used ◽  
Herbarium Collections

Abstract. Relevance. Preservation of the plant genetic diversity is necessary for carrying out largescale breeding activities in order to improve existing economically important species and create varieties of cultivated plants. The priority method is the in situ conservation. Hence is the relevance of studies of vulnerable crop wild relatives (CWR) in the Northwestern Federal District of Russia (NWFDR) for designing recommendations on their in situ conservation.Materials. The materials used in the present work were the herbarium collections of the N.I. Vavilov All-Russian Institute of Plant Genetic Resources (WIR), of the V.L. Komarov Botanical Institute of the Russian Academy of Sciences (LE), as well as the literature data, results of expeditionary surveys by VIR in 1946, 1948 and 1949, and from 2005 to 2020. The species included in the regional Red Data Books (RDB) were analyzed, data from GBIF and CWR open databases, and materials and maps of the Agroatlas used.Results and Discussions. Six species of the genus Allium, i.e. A. angulosum L., A. oleraceum L., A. schoenoprasum L., A. strictum Schrad., A. vineale L., and A. ursinum L. have been identified and proposed for conservation in the Northwestern Federal District of Russia. Maps have been built, numerous data sources, as well as the author’s own observations, analyzed. Conservation recommendations have been developed for each species based on their vulnerability.

scholarly journals Status of the Ex Situ and In Situ Conservation of Brazilian Crop Wild Relatives of Rice, Potato, Sweet Potato, and Finger Millet: Filling the Gaps of Germplasm Collections

Agronomy ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 638
Author(s):  
Marcelo B. Medeiros ◽  
José F. M. Valls ◽  
Aluana G. Abreu ◽  
Gustavo Heiden ◽  
Suelma Ribeiro-Silva ◽  
...  
Keyword(s):  
Finger Millet ◽  
Ex Situ Conservation ◽  
Gap Analysis ◽  
In Situ Conservation ◽  
Germplasm Collection ◽  
Crop Wild Relatives ◽  
Wild Relatives ◽  
Ex Situ ◽  
The Status

This study presents the status of ex situ and in situ conservation for the crop wild relatives of rice, potato, sweet potato, and finger millet in Brazil, and the subsequent germplasm collection expeditions. This research is part of a global initiative entitled “Adapting Agriculture to Climate Change: Collecting, Protecting, and Preparing Crop Wild Relatives” supported by the Global Crop Diversity Trust. Species of the primary, secondary, and tertiary gene pools with occurrences reported in Brazil were included: Oryza alta Swallen, O. grandiglumis (Döll) Prod., O. latifolia Desv., O. glumaepatula Steud., Eleusine tristachya (Lam.) Lam., E. indica (L.) Gaertn., Solanum commersonii Dunal, S. chacoense Bitter, Ipomoea grandifolia (Dammer) O’Donell, I. ramosissima (Poir.) Choisy, I. tiliacea (Willd.) Choisy, I. triloba L., and I. cynanchifolia Meisn. The status of the ex situ and in situ conservation of each taxon was assessed using the gap analysis methodology, and the results were used to plan 16 germplasm collection expeditions. Seeds of the collected material were evaluated for viability, and the protocols for seed germination and cryopreservation were tested. The final conservation score, resulting from the gap analysis and including the average of the ex situ and in situ scores, resulted in a classification of medium priority of conservation for all the species, with the exception of I. grandifolia (high priority). The total accessions collected (174) almost doubled the total accessions of these crop wild relatives incorporated in Embrapa’s ex situ conservation system prior to 2015. In addition, accessions for practically absent species were collected for the ex situ conservation system, such as Ipomoea species, Eleusine indica, and Solanum chacoense. The methods used for dormancy breaking and low temperature conservation for the Oryza, Eleusine, and Ipomoea species were promising for the incorporation of accessions in the respective gene banks. The results show the importance of efforts to collect and conserve ex situ crop wild relatives in Brazil based on previous gap analysis. The complementarity with the in situ strategy also appears to be very promising in the country.

Genetic diversity and population structure of Vigna exilis and Vigna grandiflora (Phaseoleae, Fabaceae) from Thailand based on microsatellite variation

Botany ◽  
2013 ◽  
Vol 91 (10) ◽  
pp. 653-661 ◽  
Author(s):  
Anochar Kaewwongwal ◽  
Arunee Jetsadu ◽  
Prakit Somta ◽  
Sompong Chankaew ◽  
Peerasak Srinives
Keyword(s):  
Genetic Diversity ◽  
Population Structure ◽  
Allelic Richness ◽  
Gene Diversity ◽  
In Situ Conservation ◽  
Natural Populations ◽  
Microsatellite Variation ◽  
Genetic Clusters ◽  
Simple Sequence

The objective of this research was to determine the genetic diversity and population structure of natural populations of two rare wild species of Asian Vigna (Phaseoleae, Fabaceae), Vigna exilis Tateishi & Maxted and Vigna grandiflora (Prain) Tateishi & Maxted, from Thailand. Employing 21 simple sequence repeat markers, 107 and 85 individuals from seven and five natural populations of V. exilis and V. grandiflora, respectively, were analyzed. In total, the markers detected 196 alleles for V. exilis and 219 alleles for V. grandiflora. Vigna exilis populations showed lower average values in number of alleles, allelic richness, observed heterozygosity, gene diversity, and outcrossing rate than V. grandiflora populations, namely 58.00% versus 114.60%, 51.96% versus 74.80%, 0.02% versus 0.18%, 0.40% versus 0.66%, and 3.24% versus 17.41%, respectively. Pairwise FST among populations demonstrated that V. exilis was much more differentiated than V. grandiflora. Analysis of molecular variance revealed that 41.83% and 15.06% of total variation resided among the populations of V. exilis and V. grandiflora, respectively. Seven and two genetic clusters were detected for V. grandiflora and V. exilis by STRUCTURE analysis. Our findings suggest that different strategies are required for in situ conservation of the two species. All V. exilis populations, or as many as possible, should be conserved to protect genetic resources of this species, while a few V. grandiflora populations can capture the majority of its genetic variation.

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