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Traditional maize landraces have long been part of Europe’s agricultural history. Developed through centuries of farmer selection and local adaptation, these varieties reflect the environmental, cultural, and farming conditions of different regions across the continent. Although modern hybrid breeding has transformed maize production, many of these older landraces remain preserved in European genebanks, where they represent an important reservoir of genetic diversity. Today, this diversity is receiving renewed attention. As agriculture faces increasing pressure from climate change, environmental stress, and the demand for sustainable crop production, researchers are looking back to traditional genetic resources for traits that may support future crop improvement. A recent study published in Biology, titled “Genetic and Phenotypic Evaluation of European Maize Landraces as a Tool for Conservation and Valorization of Agrobiodiversity”, explores how large-scale genetic and field-based evaluation can help reveal the value of European maize landraces and support both their conservation and practical use. Figure 1. Genetic and Phenotypic Evaluation of European Maize Landraces. Produced by MDPI academic video service (Source: https://encyclopedia.pub/video/1816). 1. From Historical Cultivation to Modern Research Maize was introduced to Europe in the late fifteenth century following its arrival from the Americas. Over time, farmers selected and cultivated maize populations adapted to local climates, soils, and agricultural practices. This long process of adaptation generated a remarkable diversity of landraces across Europe. Unlike modern commercial hybrids, landraces are genetically heterogeneous populations. Their diversity may provide greater adaptability to changing environmental conditions, making them potentially valuable for breeding programs focused on resilience and sustainability. Despite the large number of maize landraces preserved in European genebanks, many remain insufficiently characterized, limiting their broader use in crop improvement programs. 2. The EVA Maize Network To better understand and utilize European maize diversity, the ECPGR European Evaluation Network (EVA) was established as a collaborative public–private initiative. The EVA Maize Network brings together genebanks, research institutes, and breeding companies across Europe with the shared goal of evaluating maize genetic resources conserved in European collections. In this study, 626 maize landraces from eight national collections were analyzed using high-throughput SNP genotyping. Because maize is naturally outcrossing and highly heterogeneous, multiple plants were sampled from each landrace and their DNA was pooled before genotyping. The analysis applied allele-frequency prediction models with statistical assignment thresholds to classify landraces into different genetic groups and investigate patterns of diversity across Europe. 3. Genetic Diversity Patterns The genetic analysis separated the maize landraces into nine major genetic groups. These clusters reflected both geographic origins and historical patterns of maize introduction and diversification across Europe. The findings illustrate how maize diversified after arriving on the continent, with local adaptation and historical breeding practices contributing to the formation of distinct regional populations. The study also showed that some breeding materials originated from combinations of different genetic groups, highlighting the historical exchange of germplasm across European agriculture. Importantly, the results demonstrate that European genebank collections preserve substantial genetic diversity with significant potential for future breeding applications. 4. Genetic Structure of European Maize Landraces To complement the molecular analysis, the researchers also conducted large-scale field evaluations. A total of 588 landraces were tested in multi-location field trials conducted across eleven European sites over three years. Five commercial hybrid varieties were included as reference standards to support comparisons between locations and growing seasons. The experiments evaluated key agronomic traits, including flowering time, plant height, and ear height. The results revealed substantial variability in agronomic performance among the evaluated landraces. However, the phenotypic groupings only partially matched the genetic clusters identified through SNP analysis. This finding suggests that environmental adaptation and complex trait interactions play important roles in shaping maize performance under field conditions. 5. Implications for Breeding and Conservation The study highlights the importance of combining molecular characterization with large-scale phenotypic evaluation when assessing crop genetic resources. European maize landraces may contain traits associated with stress tolerance and local adaptation that could be valuable for future breeding programs. These characteristics may help support the development of maize varieties better suited to changing environmental conditions and more sustainable agricultural systems. At the same time, the research demonstrates the value of collaborative evaluation networks such as EVA. By integrating genebank resources, genetic analysis, and field testing across multiple countries, the project provides a more systematic framework for identifying useful breeding material. This approach may help bridge the gap between conservation and agricultural application. Rather than serving only as historical collections, maize landraces can become active genetic resources for crop improvement and food security. 6. Looking Forward As climate variability continues to challenge agricultural systems worldwide, maintaining crop genetic diversity is becoming increasingly important. Modern breeding depends heavily on access to diverse genetic resources capable of supporting resilience, productivity, and environmental adaptation. The combination of high-throughput genotyping and multi-environment field trials presented in this study offers a valuable strategy for unlocking the potential of European maize collections. Beyond maize itself, the work also provides a broader framework for evaluating and conserving agrobiodiversity in other crop species. Ultimately, the study reinforces the importance of preserving traditional landraces not only as part of agricultural heritage, but also as valuable resources for the future of sustainable agriculture.
Blog 28 May 2026
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Encyclopedia 2026, 6(5), 108; https://doi.org/10.3390/encyclopedia6050108

This review develops a configurational account of the relationship between religion and transnationalism by addressing a specific analytical limitation in the existing literature: its tendency to oscillate between substantializing religious traditions as already constituted entities that move across borders and segmenting transnational religion into disconnected domains such as networks, migrant communities, diasporic identities, institutions, political mobilization, digital mediation, social support, or pilgrimage. While these approaches have generated substantial empirical insight, they leave undertheorized the relational formation through which religious authority, practice, identity, material circulation, symbolic boundary-making, institutional organization, and mediated presence are assembled and made socially effective across multiple scales. To clarify this problem, the review reconstructs scholarship on religion and transnationalism through five major thematic domains: transnational religious networks, religious identity in transnational contexts, religion as a catalyst of transnationalism, the embedding of religion in transnational social practices, and distinctive forms of transnational religion. This reconstruction shows that transnational religious phenomena are inadequately understood as the spatial extension of pre-given traditions, as residual expressions of ethnicity or migration, or as discrete networks, movements, institutions, or diasporic communities. They are better grasped as historically contingent and relationally ordered formations whose temporary coherence is produced through the interaction of actors, authorities, practices, discourses, infrastructures, legal-regulatory environments, memories, obligations, and material flows. Building on the concept of social configuration, the review therefore proposes transnational religious configurations as a more precise unit of analysis for studying how the religious and the transnational are mutually constituted rather than externally connected. It defines such configurations as historically specific formations in which religious categories, institutions, practices, authorities, material resources, symbolic boundaries, and cross-border conditions of possibility are articulated across local, national, transnational, and global scales. The review operationalizes this approach through three analytical levels—conditions of possibility, construction and characteristics, and social realities and consequences—and illustrates its explanatory purchase by examining a new phenomenon within the contemporary transnational revival of Shi‘i Islam.

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