Molecular markers: an important tool to analyze the genetic diversity of local Tunisian olive varieties

Rahmani, Sameh Mnasri; Debbabi, Olfa Saddoud; Naceur, M’barek Ben

doi:10.1007/s41207-019-0118-9

Cited by 5 publications

(2 citation statements)

References 38 publications

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“…These marginal genotypes, well adapted to the extreme environmental conditions typical of the country, could have a great potential for olive genetic breeding, holding characteristics that could help in improving the long-term productivity and enhancing the competitiveness of the sector in a globalized market, especially in marginal agricultural areas. Today, there is a strong interest in the recovery and preservation of agro-biodiversity, and several projects are in place to avoid the loss of this patrimony, setting up recovery collections [32][33][34][35]. In Tunisia, although there are institutions, such as the Olive Institute, that hold a large number of olive genotypes, it is still necessary to enlarge the existing collection and develop new conservation management strategies [36][37][38].…”

Section: Discussionmentioning

confidence: 99%

Recovery, Assessment, and Molecular Characterization of Minor Olive Genotypes in Tunisia

Debbabi

Miazzi

Elloumi³

et al. 2020

Plants

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Olive is one of the oldest cultivated species in the Mediterranean Basin, including Tunisia, where it has a wide diversity, with more than 200 cultivars, of both wild and feral forms. Many minor cultivars are still present in marginal areas of Tunisia, where they are maintained by farmers in small local groves, but they are poorly characterized and evaluated. In order to recover this neglected germplasm, surveys were conducted in different areas, and 31 genotypes were collected, molecularly characterized with 12 nuclear microsatellite (simple sequence repeat (SSR)) markers, and compared with 26 reference cultivars present in the Tunisian National Olive collection. The analysis revealed an overall high genetic diversity of this olive’s germplasm, but also discovered the presence of synonymies and homonymies among the commercialized varieties. The structure analysis showed the presence of different gene pools in the analyzed germplasm. In particular, the marginal germplasm from Ras Jbal and Azmour is characterized by gene pools not present in commercial (Nurseries) varieties, pointing out the very narrow genetic base of the commercialized olive material in Tunisia, and the need to broaden it to avoid the risk of genetic erosion of this species in this country.

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Section: Discussionmentioning

confidence: 99%

Recovery, Assessment, and Molecular Characterization of Minor Olive Genotypes in Tunisia

Debbabi

Miazzi

Elloumi³

et al. 2020

Plants

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“…Consequently, GI labels are considered to be among the most powerful marketing tools available, and products bearing such labels attract premium prices (Likudis 2016). Tunisia is currently aiming at this niche market, and is seeking to establish origin-labelled olive oils from potential GI areas (Laroussi-Mezghani et al 2015;Mnasri-Rahmani et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Soil geochemistry, edaphic and climatic characteristics as components of Tunisian olive terroirs: Relationship with the multielemental composition of olive oils for their geographical traceability

Damak

Bougi

Araoka

et al. 2021

Euro-Mediterr J Environ Integr

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Olive oil traceability based on the intrinsic chemical composition of the oil is becoming increasingly important due to the prevalence of fraudulent geographical labelling of olive oils. For a traceability tool to be valid, it should be based on olive oil properties that are clearly related to provenance factors. However, multielement analysis of the oil has been used as a traceability tool without any proof of a direct link between the multielemental composition and the geographical origin of the oil. In order to verify this link, Tunisian olive terroir components from the 11 major olive-producing regions were sampled to evaluate the influences of these components (especially soil and climate) on the geochemical composition of Tunisian olive oil. Overall, geochemical processes relating to strontium and rare-earth element (REE) enrichment were found to control the multelemental compositions of Tunisian soils. Even though olive oils from the 11 Tunisian olive-growing regions considered did not strongly reflect the geochemical signatures of the corresponding Tunisian soils, the concentrations of four elements in the oils, namely Fe, Ti, Ni and Ba, showed significant positive Spearman correlations with their concentrations in the bioavailable extracts from those soils. Moreover, there were numerous significant correlations of elements in the olive oil with soil chemical and climate parameters. Our results clearly confirm that the complex interactions of the olives with the climate and soil chemistry during cultivation significantly affect the multielemental composition of the resulting olive oil. This finding implies that the elemental profile of the olive oil is an effective and valid marker of the geographical origin of the oil, as it is significantly linked to oil provenance factors. It also explains the discrepancies between the geochemical signature of an oil and that of the soil in which the olives were grown, as climate parameters affect the transfer of that signature from soil to olives. This work therefore provides the basis for a scientifically based approach to olive oil traceability. The results of this work can be utilized by agricultural authorities to realise the multielement-based traceability of olive oils from various Tunisian regions. Graphic abstract

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Molecular Analysis of the Genetic Olive Patrimony Cultivated in the Tunisian Arid Regions

Mnasri,

Saddoud,

Saleh

et al. 2024

Recent Advances in Environmental Science From the Euro-Mediterranean and Surrounding Regions (4th Edition)

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Molecular markers: an important tool to analyze the genetic diversity of local Tunisian olive varieties

Cited by 5 publications

References 38 publications

Recovery, Assessment, and Molecular Characterization of Minor Olive Genotypes in Tunisia

Recovery, Assessment, and Molecular Characterization of Minor Olive Genotypes in Tunisia

Soil geochemistry, edaphic and climatic characteristics as components of Tunisian olive terroirs: Relationship with the multielemental composition of olive oils for their geographical traceability

Molecular Analysis of the Genetic Olive Patrimony Cultivated in the Tunisian Arid Regions

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