ReviewProtected Designation of Origin (PDO), Protected Geographical Indication (PGI) and Traditional Speciality Guaranteed (TSG): A bibiliometric analysis
Graphical abstract
Introduction
As part of its food quality policy, the European Union (EU) promotes three types of quality labels for agricultural products and foodstuffs: Protected Designation of Origin (PDO), Protected Geographical Indication (PGI) and Traditional Speciality Guaranteed (TSG) (European Commission, 2013). PDO covers agricultural products or foodstuffs that are produced, processed and prepared in a specific geographical area, using recognized know-how. PGI covers agricultural products or foodstuffs closely linked to a geographical area; at least one of the stages of production, processing or preparation occurs in that area, while the raw material used in production can come from another region. Finally, TSG covers agricultural products and foodstuffs that are produced using traditional raw material or traditional production methods, or that have a traditional composition, with no restriction as to the product's geographical origin.
The PDO, PGI and TSG schemes were introduced, not only as a way to support consumers' decisions, but also as a mean of food control (Grunert and Aachmann, 2016, Hajdukiewicz, 2014). European producers are aware of these schemes and consumers are showing renewed interest in traditional food (Almli et al., 2011, Grunert and Aachmann, 2016, Guerrero et al., 2010). On one hand, agricultural producers in the EU are increasingly interested in using geographical indications to differentiate their products in international markets, and thereby improve their competitiveness and profitability. On the other, consumers' growing interest in quality and traditional products creates a demand for agricultural products and foodstuffs with specific, identifiable characteristics, particularly those that are linked to their geographical origin and their production method (Hajdukiewicz, 2014).
In 1992, the first European legislation for agricultural products and foodstuffs was adopted, covering PGI and PDO labels. Those legislation was inspired on existing national systems, such as the French AOC (Appellation d'Origine Contrôlée) and Italian DOC (Denominazione d'Origine Controllata) (European Commission, 2011). The French AOC system is closely linked to the concept of terroir, since a terroir product is characterised by a specific geographical origin, developed over a long period of interaction with local traditions, the local environment and know-how (Barham, 2003, Hajdukiewicz, 2014). These factors are considered in applying PDO/PGI schemes (Hegnes, 2012).
In 2006, Regulation (EU) N° 509/2006 was adopted, creating a regulatory framework of the TSG label for agricultural products and foodstuffs. The latest regulation on agro-food quality certification schemes came into force on 3 January 2013 – Regulation (EU) N° 1151/2012. Applications to use any of those schemes are generally managed by a group of producers, through the national food authority's communication with the European Commission. The Commission analyses applications, in order to guarantee the right to use the respective label. However, Regulation (EU) N° 1151/2012 is not applied to wine products, except for wine vinegar, since those products require specific control rules, according to Regulation (CE) N° 1234/2007. Wine products can benefit from the PDO and PGI labels but not from TSG.
It is of note that currently producers from countries outside the EU can join EU quality certification systems, according to the World Trade Organization's rules on international commerce. Since 2006, applications for registration of PDO, PGI and TSG labels by producers in other countries, and objections in relation to applications made individually in other countries, can be made directly to the European Commission. However, the number of international registrations is very low (Hajdukiewicz, 2014).
There is a need to protect high quality products with geographical indications and designations of origin from possible commercial fraud, since such products are related to higher retail price and bring in higher financial benefits to producers in comparison with other similar products (Danezis, Tsagkaris, Brusic, & Georgiou, 2016). Methods for testing authenticity and providing analytical data on traceability require robust analytical techniques that can be used by the various regulatory authorities (Camin et al., 2017). So, it is not surprising that studies about food authentication cover more and more certified traditional products such as cheese (Fontenele, Bastos, dos Santos, Bemquerer, & do Egito, 2017), wine vinegars (Paneque et al., 2017, Ríos-Reina et al., 2017), vegetables (Drivelos et al., 2016, Mir-Marqués et al., 2016), meat (Mateus & Russo-Almeida, 2015), lard (Chiesa et al., 2016) or saffron (Cagliani, Culeddu, Chessa, & Consonni, 2015).
Food authentication aims to identify unique markers or groups of markers to characterise the authenticity of food or their potential adulterants/contaminants and use them to resolve authenticity problems (Guerreiro, Barros, Fernandes, Pires, & Bardsley, 2013). The studies about markers of authenticity of high-value added products, such PDO cheeses, analyse important topics like the evaluation of the proteolytic profiles in terms of ripening time and milk admixtures (Guerreiro et al., 2013), or the determination of biochemical, volatile and textural profiles during manufacture and ripening (Bertolino, Dolci, Giordano, Rolle, & Zeppa, 2011). Thus, reliability of food authenticity markers and the evaluation of factors that affect them are crucial to ensure the right decision about a product authenticity or an adulteration.
Despite the importance of PDO, PGI and TSG schemes and the various issues related to those, literature reviews on the subject are lacking (Grunert & Aachmann, 2016). The few existing reviews are about specific topics such as consumer reactions to the use of this type of scheme (Grunert & Aachmann, 2016), the economic perspective (Hajdukiewicz, 2014) or food authentication (Danezis et al., 2016). Considering the continuing lack of a more generic and aggregating review of various research topics on this subject, our aim here is to make a bibliometric analysis of the PDO, PGI and TSG schemes, in order to understand the state of academic research in this field. The analysis will consider articles on the ISI Web of Science database, covering publications up to 2016.
This study is structured in various sections. After analysis of statistical data and description of the methodology used, we examine 501 articles included on the ISI Web of Science database, considering publication in all areas of research. This is followed by the descriptive analysis of the results and analysis of the main thematic areas, resorting to the bibliometric technique of term co-occurrence. In the last part, after summarizing the main aspects dealt with in this study, we indicate limitations and future lines of research.
Section snippets
Statistical data
According to DOOR database (2017), Southern European countries present the greatest number of PDO, PGI and TSG registrations. Italy and France stand out, having a long tradition of protecting and promoting products nationally, followed by Spain, Portugal and Greece (Fig. 1). PGI is the principal certification scheme, followed by PDO and TSG, although the last named has a low number of registrations (Fig. 2). “Fruit, vegetables and cereals”, and “cheeses”, are the product types with most
Data collection
Our research took place in June 2017 and focused on articles on ISI Web of Science, including articles up to 2016. In a first phase, documents using in the title, abstract or key words (Topic) one of the following terms: “Protected Designation of Origin”, “Protected Geographical Indication” or “Traditional Speciality Guaranteed” were selected. This search resulted in an initial sample of 577 documents. The review was limited to peer-reviewed published articles, omitting books, book chapters and
Descriptive analysis
In the sample of 501 articles on PDO, PGI and TSG, the first article was published in 1999 (Mannu et al., 1999) and falls into the area of microbiology. This is a topic with a growing number of articles published in recent years, with 83 articles published in 2016. As may be observed in Fig. 5, the PDO label stands out in comparison to PGI and TSG labels. Moreover, Fig. 5 also enhance that TSG is clearly the most understudied issue. Regarding journals, these are led by “Food Chemistry”,
Conclusions
This study presents a bibliometric analysis of three EU food quality certification schemes: PDO, PGI and TSG. Although the field has a growing number of articles published in recent years, our search failed to reveal any study addressing the main thematic lines of research. Therefore, by using the bibliometric technique of term co-occurrence, it was possible to group the literature in four thematic clusters: “Protected Geographical Indication”, “Certification of Olive Oil and Cultivars”, “
Limitations and future lines of research
Our study has some limitations. Firstly, it is based only on articles on ISI Web of Science. Secondly, the filtering process used may have omitted relevant literature but the rigorous methodological (reproducible) procedure mitigates the fact that excluded articles may include information significantly altering our conclusions. Furthermore, defining a minimum number of term occurrences, in the thematic analysis, prevents the identification of all terms as well as the relationship between them.
Acknowledgements
This work was supported by the Fundação para a Ciência e a Tecnologia under Grant [Number UID/ECO/04007/2013]; FEDER/COMPETE under Grant [number POCI-01-0145-FEDER-007659].
References (100)
- et al.
Muscle colour and chemical and fatty acid composition of “Agnello di Sardegna” PGI suckling lamb
Small Ruminant Research
(2013) - et al.
Effect of slaughter season on fatty acid composition, conjugated linoleic acid isomers and nutritional value of intramuscular fat in Barrosã-PDO veal
Meat Science
(2007) - et al.
General image and attribute perceptions of traditional food in six European countries
Food Quality and Preference
(2011) - et al.
Traceability of “Limone di Siracusa PGI” by a multidisciplinary analytical and chemometric approach
Food Chemistry
(2016) Translating terroir: The global challenge of French AOC labeling
Journal of Rural Studies
(2003)- et al.
Chemical characterization of chestnut cultivars from three consecutive years: Chemometrics and contribution for authentication
Food and Chemical Toxicology
(2012) - et al.
Evolution of chemico-physical characteristics during manufacture and ripening of Castelmagno PDO cheese in wintertime
Food Chemistry
(2011) - et al.
Microbiological characterisation of Robiola di Roccaverano cheese using PCR-DGGE
Food Microbiology
(2008) - et al.
Elemental and isotopic characterisation of typical Italian alpine cheeses
International Dairy Journal
(2011) - et al.
Nutritional quality of chestnut (Castanea sativa Mill.) cultivars from Portugal
Food Chemistry
(2008)
Lipid and fatty acid profiles of Castanea sativa Mill. Chestnuts of 17 native Portuguese cultivars
Journal of Food Composition and Analysis
Microsatellite and DNA-barcode regions typing combined with High Resolution Melting (HRM) analysis for food forensic uses: A case study on lentils (Lens culinaris)
Food Research International
Characterisation of the geographical origin of buffalo milk and mozzarella cheese by means of analytical and spectroscopic determinations
Food Chemistry
Stable isotope techniques for verifying the declared geographical origin of food in legal cases
Trends in Food Science and Technology
Olive oil stability under deep-frying conditions
Food and Chemical Toxicology
Characterisation of PDO olive oil Chianti Classico by non-selective (UV-visible, NIR and MIR spectroscopy) and selective (fatty acid composition) analytical techniques
Analytica Chimica Acta
Authentication of Italian PDO lard using NIR spectroscopy, volatile profile and fatty acid composition combined with chemometrics
Food Chemistry
Quantification of free and esterified sterols in Portuguese olive oils by solid-phase extraction and gas chromatography-mass spectrometry
Journal of Chromatography A
Food authentication: state of the art and prospects
Current Opinion in Food Science
Characterisation by SPME-GC-MS of the volatile profile of a Spanish soft cheese P.D.O. Torta del Casar during ripening
Food Chemistry
Antibiotic resistance and microbial composition along the manufacturing process of Mozzarella di Bufala Campana
International Journal of Food Microbiology
Rare earth elements minimal harvest year variation facilitates robust geographical origin discrimination: The case of PDO “Fava Santorinis”
Food Chemistry
In vitro digestion of Bresaola proteins and release of potential bioactive peptides
Food Research International (Part B)
Goat systems of Villuercas-Ibores area in SW Spain: Problems and perspectives of traditional farming systems
Small Ruminant Research
Metabolite composition of chestnut (Castanea sativa Mill.) upon cooking: Proximate analysis, fibre, organic acids and phenolics
Food Chemistry
Trace-element composition and stable-isotope ratio for discrimination of foods with Protected Designation of Origin
TrAC Trends in Analytical Chemistry
Consumer reactions to the use of EU quality labels on food products: A review of the literature
Food Control
Principal component analysis of proteolytic profiles as markers of authenticity of PDO cheeses
Food Chemistry
Perception of traditional food products in six European regions using free word association
Food Quality and Preference
Winter feeding systems and dairy cow breed have an impact on milk composition and flavour of two Protected Designation of Origin French cheeses
Animal
PDO virgin olive oil quality-Minor components and organoleptic evaluation
Food Research International
Study of oils from Calabrian olive cultivars by chemometric methods
Food Chemistry
Classification of extra virgin olive oils according to the protected designation of origin, olive variety and geographical origin
Talanta
Effect of microwave heating with different exposure times on physical and chemical parameters of olive oil
Food and Chemical Toxicology
Comparison of purge and trap and solid phase microextraction techniques for studying the volatile aroma compounds of three European PDO hard cheeses
International Dairy Journal
Detection of irradiated chestnuts: preliminary study using three analytical techniques
Radiation Physics and Chemistry
Strain typing among enterococci isolated from home-made Pecorino Sardo cheese
FEMS Microbiology Letters
Class-modeling techniques in the authentication of Italian oils from Sicily with a Protected Denomination of Origin (PDO)
Chemometrics and Intelligent Laboratory Systems
Traceability of 9 Portuguese cattle breeds with PDO products in the market using microsatellites
Food Control
Chemometric characterization of three varietal olive oils (Cvs. Cobrançosa, Madural and Verdeal Transmontana) extracted from olives with different maturation indices
Food Chemistry
Carcass characteristics of suckling lambs protected by the PGI “lechazo de Castilla y León” European quality label: Effect of breed, sex and carcass weight
Meat Science
Quality traits of suckling-lamb meat covered by the protected geographical indication “Lechazo de Castilla y León” European quality label
Small Ruminant Research
Pattern recognition of peach cultivars (Prunus persica L.) from their volatile components
Food Chemistry
Terpenes and fatty acid profiles of milk fat and “Bitto” cheese as affected by transhumance of cows on different mountain pastures
Food Chemistry
A sensitive HPLC method to detect hen’s egg white lysozyme in milk and dairy products
International Dairy Journal
Chemometric classification of several olive cultivars from Trás-os-Montes region (northeast of Portugal) using artificial neural networks
Chemometrics and Intelligent Laboratory Systems
Sheep's and goat's dairy products in Italy: Technological, chemical, microbiological, and sensory aspects
Small Ruminant Research
Towards a multiplex cereal traceability tool using padlock probe ligation on genomic DNA
Food Chemistry
The relevance of origin information at the point of sale
Food Quality and Preference
Yield and olive oil characteristics of a low-density orchard (cv. Cordovil) subjected to different irrigation regimes
Agricultural Water Management
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