The role of Turkey in the world hazelnut production and  exporting

Uzundumlu, Ahmet Semih; Kurtoğlu, Seval; Şerefoğlu, Coşkun

doi:10.9755/ejfa.2022.v34.i1.2810

Cited by 7 publications

(5 citation statements)

References 16 publications

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“…The intricate architecture of international business dictates that corporations must navigate through multiple economic, political, and cultural environments, which implies a constant confrontation with diversity and uncertainty. Diversification of companies, this is, the strategic expansion of their product or service portfolio, is a crucial component to ensure sustainability and business resilience in this scenario of globalization (Uzundumlu et al, 2022). This tactic is used to mitigate the risks associated with excessive dependence on a single product line or specific market niche while leveraging opportunities for innovation and added value creation.…”

Section: Introductionmentioning

confidence: 99%

Diversification of Fresh Asparagus Exports from Perú

Arbulú Ballesteros,

Montes Ninaquispe,

Ludeña Jugo

et al. 2024

JESR

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This quantitative descriptive study examined the diversification of asparagus exports in Peru using the Herfindahl-Hirschman Index (HHI). The results show a clear dominance of the United States as the main export destination, although there was an annual decrease of 6.7% in 2022. The HHI revealed a growing trend towards greater market concentration in Peruvian asparagus exports. At the company level, despite a general decrease in the number of exporting companies, significant growth was observed in some of them, such as Agrícola Cerro Prieto and Agrovision. Based on these results, it is recommended that Peruvian companies seek further diversification of their export markets to minimize dependence on a single market and develop adaptable and resilient business strategies to cope with a constantly evolving market. Received: 17 December 2023 / Accepted: 27 February 2024 / Published: 5 March 2024

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Section: Introductionmentioning

confidence: 99%

Diversification of Fresh Asparagus Exports from Perú

Arbulú Ballesteros,

Montes Ninaquispe,

Ludeña Jugo

et al. 2024

JESR

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“…Currently, commercial cultivation relies overwhelmingly on cultivars of European hazelnut (C. avellana) adapted to Mediterranean climates (Di Lena et al, 2022) with moderate winters to satisfy their chilling requirements (Mehlenbacher, 1991). The distribution of hazelnut production reflects these climatic requirements, with major centers of production in Turkey, Italy, and Spain, with Turkey alone producing over 65% of the global supply (Semih Uzundumlu et al, 2022). In the U.S., this narrow range of adaptation currently restricts production to relatively small regions such as the Willamette Valley in Oregon (Revord et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

The first two chromosome-scale genome assemblies of American hazelnut enable comparative genomic analysis of the genusCorylus

Brainard

Sanders

Brůna

et al. 2023

Preprint

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The native shrub American hazelnut (Corylus americana) is currently used in breeding programs that are aiming to develop commercially viable hazelnut varieties for the U.S. Upper Midwestern U.S. This species provides significant ecological benefits as it is a perennial crop and well-adapted to this region. Breeding cycles for perennial species are long, and may benefit from the use of predictive methods such as genomic selection to reduce cycle time and increase the efficiency of field trials. High-quality reference genome assemblies are very useful for the implementation marker-assisted selection and genomic prediction, and we therefore developed the first chromosome-scale reference assemblies for C. americana, using the accessions 'Rush' and 'Winkler'. Initial draft assemblies were created using HiFi PacBio reads and Arima Hi-C sequencing to assemble genomes into 11 pseudomolecules. We then utilized Oxford Nanopore reads and a high-density genetic map in order to perform error correction. N50 scores were calculated to be 31.9 Mb and 35.3 Mb for 'Rush' and 'Winkler', respectively, while 97.1% (for 'Winkler') and 90.2% (for 'Rush') of the total genome was assembled into the 11 pseudomolecules. Gene prediction was performed using both RNAseq libraries as well as protein homology data. 'Rush' had a BUSCO score of 99.0 for its assembly and 99.0 for its annotation, while 'Winkler' had corresponding scores of 96.9 and 96.5, indicating extremely high-quality assemblies. These two independent, de novo assemblies enable unbiased assessment of structural variation across the genome, as well as patterns of syntenic relationships within C. americana and the Corylus genus. These assemblies are also an important first step in providing a resource for using next-generation sequencing data in the improvement of C. americana. We demonstrate this utility through the generation of high-density SNP marker sets from genotyping-by-sequencing data for 1,343 C. americana, C. avellana, and C. americana x C. avellana hybrids, in order to assess population structure in natural and breeding populations. Finally, the transcriptomes of these assemblies, as well as several other recently published Corylus genomes, were utilized to perform phylogenetic analysis of sporophytic self-incompatibility (SSI) in hazelnut, providing further evidence of unique molecular pathways governing self-incompatibility in Corylus not exhibited in other well-studied SSI systems. We hope these assemblies will aide in the application of modern breeding methods to the development of commercially viable hazelnut varieties for the U.S. Upper Midwest.

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“…Globally, hazelnuts come in second place to almonds as far as cultivation is concerned. They have an important place in human nutrition and are mainly used in confectionery, but they are also used as table nuts and in oil production [1].…”

Section: Introductionmentioning

confidence: 99%

Nondestructive Estimation of Hazelnut (Corylus avellana L.) Terminal Velocity and Drag Coefficient Based on Some Fruit Physical Properties Using Machine Learning Algorithms

Kabas,

Kayakus,

Moiceanu

2023

Foods

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Hazelnut culture originated in Turkey, which has the highest volume and area of hazelnut production in the world. For the design and sizing of equipment and structures in agricultural operations for the hazelnut industry, especially harvesting operations and post-harvest operations, it is essential that an understanding of hazelnuts’ aerodynamic properties, i.e., terminal velocity and drag coefficient, is acquired. In this study, the moisture, mass, density, projected area, surface area, and geometric diameter were used as independent variables in the data set, and the dependent variables terminal velocity and drag coefficient estimation were determined. In this study, logistic regression (LR), support vector regression (SVR), and artificial neural networks (ANNs) were used based on machine learning methods. When the results were evaluated according to R2 (determination coefficient), MSE (mean squared error), and MAE (mean absolute error) metrics, it was seen that the most successful models were the ANN, SVR, and LR, respectively. According to the R2 metric, the ANN method achieved 91.5% for the terminal velocity of hazelnuts and 85.9% for the drag coefficient of hazelnuts. Using the independent variables in the study, it was seen that the terminal velocity and drag coefficient value of hazelnuts could be successfully estimated.

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The role of Turkey in the world hazelnut production and exporting

Cited by 7 publications

References 16 publications

Diversification of Fresh Asparagus Exports from Perú

Diversification of Fresh Asparagus Exports from Perú

The first two chromosome-scale genome assemblies of American hazelnut enable comparative genomic analysis of the genusCorylus

Nondestructive Estimation of Hazelnut (Corylus avellana L.) Terminal Velocity and Drag Coefficient Based on Some Fruit Physical Properties Using Machine Learning Algorithms

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