scholarly journals Community Seed Banks in China: Achievements, Challenges and Prospects

2021 ◽  
Vol 5 ◽  
Author(s):  
Xin Song ◽  
Guanqi Li ◽  
Ronnie Vernooy ◽  
Yiching Song

The rich agrobiodiversity of China is under unprecedented threat, experiencing a dramatic loss of many valuable local varieties and wild relatives of main crops. The country's formal conservation system of ex situ genebanks faces serious challenges to address this loss. Community seed banks can play a key role to complement the conservation activities of these genebanks and provide other important collective goods, such as evolutionary services, but although they have been around for some 35 years in various parts of the world, in China they have a much shorter history. In recent years though the number has increased to almost 30 in 2020, in particular due to the efforts of the China Farmers' Seed Network. The community seed banks in the country are very diverse in terms of functions and services, forms of management and institutional linkages. Compared to the most common functions of community seed banks in other countries, China is bringing an important design innovation through two new functions: adding value to seed and produce through innovative marketing strategies, and building regional and national seed system linkages and fostering collaboration. The review of community seed banking not only provides rich empirical evidence, but also makes an important contribution to theory. Building on the achievements of community seed banking in the last decade, there is scope to scale this kind of very valuable agrobiodiversity conservation approach through more effective uptake and support by relevant national policies.

2021 ◽  
Vol 42 ◽  
pp. e69341
Author(s):  
Miguel Ángel González Pérez ◽  
Nereida Cabrera-García ◽  
Isabel Cayon-Fernández

Conservation seed banks are essential for ex-situ conservation of genetic biodiversity. These institutions are especially relevant for threatened species and play a vital role in their conservation by preserving genetic material. However, samples deposited in the seed banks must germinate when necessary to use them (i.e., recovery plans, etc.). This study uses four accessions of the endemic endangered species from Gran Canaria Island (Canary Islands), Isoplexis isabelliana (Webb & Berthel.) Masf. (Scrophulariaceae). Germination tests were carried out to measure seed viability through time and the possible impact of seed storage on their viability. These accessions have been kept in the seed bank for four months to thirty years under different storage conditions. Germination results differed for seeds after 45 days of exposition using 16 hours light and 8 hours darkness at 17 °C. Accessions kept in the seed bank, independently of storage, showed a high germination percentage (89%). Whereas the accessions with rough storage conditions showed a 0% germination rate. The results highlighted the good state of conservation of the material deposited in the Seed Bank of the Botanical Garden "Viera y Clavijo" and the reliability of the temperature and humidity conditions in which the seeds of I. isabelliana have been stored. We consider these results as momentous since several natural populations of I. isabelliana has been affected by the last forest fire on the island.


2020 ◽  
pp. 135676672095034
Author(s):  
Weisheng Chiu ◽  
Heetae Cho

Exploring tourist experience through analyzing user-generated content (UGC) has been considered as an appropriate approach for experience studies due to the rich information from the perspective of tourists. Thus, this study identified the conceptual map of individuals’ aboriginal tourism experiences by analyzing UGC, including photos and texts. A total of 206 photos and 278 reviews posted by tourists on TripAdvisor were collected and analyzed. Photo content analysis showed that aboriginal culture emerged as the most indelible experience for visitors. Analysis of text data disclosed key themes: park, tribe, car, garden, and children. Further analysis found different patterns in tourist experiences across numerous travel parties and satisfaction levels. This study explored tourists’ narratives and identified important concepts and themes of their ‘lived experience’ of aboriginal tourism. The findings of this study contribute to expanding theoretical knowledge by introducing innovative analytic techniques. Practically, this study offers a blueprint for designing the aboriginal tourism product, which can optimize the tourist experience. In addition, the differences in tourist experience with regard to travel party and level of satisfaction suggest specific marketing strategies for different segments.


Plants ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 2371
Author(s):  
Elinor Breman ◽  
Daniel Ballesteros ◽  
Elena Castillo-Lorenzo ◽  
Christopher Cockel ◽  
John Dickie ◽  
...  

There is a pressing need to conserve plant diversity to prevent extinctions and to enable sustainable use of plant material by current and future generations. Here, we review the contribution that living collections and seed banks based in botanic gardens around the world make to wild plant conservation and to tackling global challenges. We focus in particular on the work of Botanic Gardens Conservation International and the Millennium Seed Bank of the Royal Botanic Gardens, Kew, with its associated global Partnership. The advantages and limitations of conservation of plant diversity as both living material and seed collections are reviewed, and the need for additional research and conservation measures, such as cryopreservation, to enable the long-term conservation of ‘exceptional species’ is discussed. We highlight the importance of networks and sharing access to data and plant material. The skill sets found within botanic gardens and seed banks complement each other and enable the development of integrated conservation (linking in situ and ex situ efforts). Using a number of case studies we demonstrate how botanic gardens and seed banks support integrated conservation and research for agriculture and food security, restoration and reforestation, as well as supporting local livelihoods.


2021 ◽  
Vol 10 (8) ◽  
pp. e55310817705
Author(s):  
Otavio Rechsteiner Maghelly ◽  
Juliana Bernardi Ogliari ◽  
Francisco Wilson Reichert Junior ◽  
Nuno de Campos Filho ◽  
Rosenilda de Souza ◽  
...  

Drought is the main factor of abiotic stress in dryland rice cultivation, responsible for considerable productivity losses and grain quality damages, as well as genetic erosion of local varieties of this crop. The use of indices in the drought tolerance estimation in grains of this crop is acquiring importance for its advantages in the operationalization of tests of comparison between genotypes and their effectiveness in the differentiation of responses to drought stress. Among local dryland varieties of rice preserved by small-scale farmers in far western Santa Catarina, different responses to drought tolerance are expected. The identification of these differential responses is important in the context of agrobiodiversity conservation, genetic improvement, and as an alternative to the effects of climate changes. The objective of the present study was to evaluate thirty-four local varieties of dryland rice from far western Santa Catarina regarding drought tolerance. For this aim, this work used the DTD (Drought Tolerance Degree) methodology. Fifteen varieties showed greater resistance when submitted to a water restriction level of 10% in water moisture. On the other hand, six varieties were more resistant to moderate stress (20%). Finally, three varieties were among the most resistant in the two applied stress levels.


2019 ◽  
Vol 97 (3) ◽  
pp. 413 ◽  
Author(s):  
Valeria Flores-Enríquez ◽  
Guillermo Castillo ◽  
Margarita Collazo-Ortega

<p><strong>Background</strong>: Podostemaceae are extremely susceptible to local extinction by habitat loss. Since ~70 % of the river systems in Mexico show some degree of water contamination, it is relevant to generate information about seed storage and germination behavior to design germplasm conservation strategies (<em>e.g</em>., <em>ex situ</em> seed banks) of Mexican podostemads.</p><p><strong>Hypotheses</strong>: Seed germination decreases as seed storage time increases. Further, light quality, temperature and collection site influence similarly the germination response of both species.</p><p><strong>Studied species</strong>: <em>Marathrum foeniculaceum</em> Humb. &amp; Bonpl., <em>Noveloa coulteriana</em> (Tul.)<em> </em>C. Philbrick</p><p><strong>Study site and years of study</strong>: 13 different seeds collections (1996-2013), at four locations in the rivers Horcones and Arroyo del Rincon Jalisco, México. </p><p><strong>Methods</strong>: A germination chamber experiment was performed to evaluate the effect of temperature, light quality and storage time on the germination of both species.</p><p><strong>Results</strong>: Seeds lose viability after nine years of storage. In both species, the time to reach the highest Accumulated Germination Percentage (AGP) was faster in seeds of one-two yr compared to seeds of six-seven yr. <em>N. coulteriana</em> have significant differences in Final Germination Percentage (FGP) between collection rivers. Storage time affects AGP of <em>N. </em>coulteriana more than in <em>M. foeniculaceum.</em></p><p><strong>Conclusions</strong>: Both species can form <em>ex situ</em> seed banks up to 8 yr age in paper bags storage. <em>N. coulteriana</em> is more susceptible to variation in storage conditions compared to <em>M. </em><em>foeniculaceum</em>. Collection site affect seed germination after storing.  Long-term conventional <em>ex situ</em> seed germination storage is not a viable strategy to conserve germplasm of Podostemaceae.</p>


Nature Plants ◽  
2019 ◽  
Vol 5 (2) ◽  
pp. 122-123 ◽  
Author(s):  
Sarah E. Dalrymple ◽  
Thomas Abeli
Keyword(s):  
Red List ◽  

Author(s):  
Marius Guillaume Sinha ◽  
Gilles Habib Todjro Cacaï ◽  
Jerome Anani Houngue ◽  
Serge Sètondji Houédjissin ◽  
Thiéris Dassoudo Sossou ◽  
...  

Background: Monovarietal cultivation of cotton plant allowed the genetic erosion for traditional cotton varieties that proceed essential traits mainly involved in cotton genetic breeding. These varieties need to be preserved for future used. This study aims to evaluate the effect of gibberellic acid on cotton seed germination and the effect of Benzylaminopurin (BAP), Kinetin (KIN), α-naphthalene acetic acid (NAA) and activated charcoal (CA) on cotton seedlings growth obtained from different type of explants. Methodology: The seeds of three improved varieties (KET782, ANG956, OKP768) and five local varieties (Q62, Q64, Q85, Q88, Q92) were germinated with different concentration of gibberellic acid (GA3). Different explants were collected from the germinated plantlets and cultivated in different culture media containing plants growth regulators and activated charcoal in different concentration. Results: We found that Gibberellic Acid activity on cotton seeds germination significantly varied according to the variety and GA3 concentration in the medium. 63.33% germination rate in OKP768 was obtained on the medium containing 0.5 mg/L of GA3 while the medium with 1 mg/l of GA3 gave the highest seed germination in Q85 (75%), Q64 (69.17%), and ANG956 (40.83%). The plantlets regeneration rate varied within the explants in different varieties used. 100%of axillary nodes were regenerated in Q62; Q85 and Q92 varieties while 60% were regenerated with the zygotic embryos in ANG956, and OKP768. Moreover, the medium supplemented with GA3 (1mg/l) + NAA (1 mg/l) induced the greatest number of roots (2.75 roots/plantlet) in the ANG956 and OKP768 varieties. With activated charcoal (10 g/l), ANG956 and OKP768 varieties achieved better performance with respective roots length average of 3.4 cm/plantlet and 2.1 cm/plantlet. The activated charcoal at 10 g/l highly influenced the length of roots with an average of 7.7cm in ANG956 variety. Implication: The protocol established during this study will be useful for in vitro regeneration and conservation for cotton local varieties.


2011 ◽  
Vol 22 (1) ◽  
pp. 45-53 ◽  
Author(s):  
Ana Loureiro Cheib ◽  
Queila Souza Garcia

AbstractThe influence of light and temperature on germination behaviour and the longevity of seeds were evaluated in four taxa of the genusArthrocereus(Cactaceae). Germination experiments were conducted at six constant temperatures with a 12-h photoperiod and in continuous darkness. Forin situstorage tests, the seeds were buried in the soil where the species naturally occur, and germination experiments were performed for 14 months. Seeds were also stored dry at room temperature in the laboratory for 12 months. The results indicated that, in spite of the variations between the four taxa studied, there is a consistent pattern in their germination behaviour. The seeds are small, with an absolute requirement of light for germination. In the presence of light, we obtained high germinability at temperatures between 20 and 30°C and low germination percentages at 10, 15 and 35°C. This behaviour may represent an adaptive mechanism during seasons when environmental conditions in open rocky fields are not favourable for seedling survival. In general, germination was relatively slow, which would favour establishment during the rainy season. Dry storage did not significantly alter seed germination behaviour, and buried seeds, likewise, remained viable and retained high germination percentages. We can therefore infer that the seeds of the species studied here are able to form persistent soil seed-banks. All studied species are threatened with extinction, so their ability to form soil seed-banks, together with the possibility ofex situseed preservation, will possibly give support for future conservation efforts.


Heredity ◽  
2021 ◽  
Author(s):  
Francis Denisse McLean-Rodríguez ◽  
Denise Elston Costich ◽  
Tania Carolina Camacho-Villa ◽  
Mario Enrico Pè ◽  
Matteo Dell’Acqua

AbstractGenomics-based, longitudinal comparisons between ex situ and in situ agrobiodiversity conservation strategies can contribute to a better understanding of their underlying effects. However, landrace designations, ambiguous common names, and gaps in sampling information complicate the identification of matching ex situ and in situ seed lots. Here we report a 50-year longitudinal comparison of the genetic diversity of a set of 13 accessions from the state of Morelos, Mexico, conserved ex situ since 1967 and retrieved in situ from the same donor families in 2017. We interviewed farmer families who donated in situ landraces to understand their germplasm selection criteria. Samples were genotyped by sequencing, producing 74,739 SNPs. Comparing the two sample groups, we show that ex situ and in situ genome-wide diversity was similar. In situ samples had 3.1% fewer SNPs and lower pairwise genetic distances (Fst 0.008–0.113) than ex situ samples (Fst 0.031–0.128), but displayed the same heterozygosity. Despite genome-wide similarities across samples, we could identify several loci under selection when comparing in situ and ex situ seed lots, suggesting ongoing evolution in farmer fields. Eight loci in chromosomes 3, 5, 6, and 10 showed evidence of selection in situ that could be related with farmers’ selection criteria surveyed with focus groups and interviews at the sampling site in 2017, including wider kernels and larger ear size. Our results have implications for ex situ collection resampling strategies and the in situ conservation of threatened landraces.


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