Molecular genetic diversity of the Turkish national hazelnut collection and selection of a core set

Öztürk, Süleyman Can; Balık, Hüseyin İrfan; Balık, Selda Kayalak; Kızılcı, Gökhan; Duyar, Ömür; Doğanlar, Sami; Frary, Anne

doi:10.1007/s11295-017-1195-z

Cited by 21 publications

(16 citation statements)

References 34 publications

(48 reference statements)

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“…The hazelnut collection evaluated was highly polymorphic for its storage proteins as the percentage of polymorphic loci was 82.9%, showing also considerable diversity (h = 0.291 ± 0.029). In fact, using other molecular markers, several studies have consistently shown a great genetic diversity for this tree nut [ 9 , 27 ].…”

Section: Resultsmentioning

confidence: 99%

“…Individuals with minor hazelnut-induced allergic reactions might also consider carefully selecting specific hazelnut varieties for possible consumption. In fact, hazelnut is a wind-pollinated species and it has a self-incompatible mating system that enforces cross-pollination; thus, genetic diversity is expected to be high in naturally occurring plants [ 9 ]. The information on overall gene transcription patterns of hazelnut allergens is still very scarce [ 10 , 11 ] and their correlation with expressed proteins/allergens and its allergenic potential was not described.…”

Section: Introductionmentioning

confidence: 99%

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Natural Variation of Hazelnut Allergenicity: Is There Any Potential for Selecting Hypoallergenic Varieties?

et al. 2020

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Hazelnuts (Corylus avellana L.) have an important role in human nutrition and health. However, they are a common cause of food allergy. Due to hazelnut varietal diversity, variety-dependent differences in the IgE-binding properties may be suspected, which could allow therapeutic strategies based on the use of hypoallergenic varieties to induce desensitization. In a proteogenomic approach, we aimed to evaluate the allergenic potential of a genetically diverse set of hazelnuts (n = 13 varieties). Minor differences were found at the level of genes encoding important allergens, namely Cor a 8, Cor a 9, and Cor a 14. Nevertheless, IgE-reactivity was similar for all varieties using sera from seven allergic individuals. The predominant IgE-reactive proteins were Cor a 9 (100%) and Cor a 1.04 (60%), with the former being the most frequently identified by a two-dimensional gel electrophoresis (2-DE)-based proteomic approach. Therefore, it seems that the conventional exclusion diet will hold its ground for the time being.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Natural Variation of Hazelnut Allergenicity: Is There Any Potential for Selecting Hypoallergenic Varieties?

et al. 2020

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“…Additionally, woody perennial varieties often remain genetically indistinct from their uncultivated wild counterparts [84]. Comparative multivariate analysis of genome-wide DNA markers shows that cultivated individuals of apple [105], grape [106,107], and European hazelnut [108] appear undifferentiated from either their progenitors or wild relatives, even following selection. Such genetic similarities suggest ongoing gene flow between cultivated selections and wild germplasm following domestication [106], which occurs very regularly [109].…”

Section: Corylus Avellana Corylus Americanamentioning

confidence: 99%

Germplasm Development of Underutilized Temperate U.S. Tree Crops

et al. 2019

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In the Midwest U.S. dominated corn-soybean landscape, agroforestry systems can be particularly valuable for increasing the provisioning and regulatory capacity of the agricultural landscape. However, these systems have not yet been broadly integrated into the landscape of this region since they are mostly relegated to marginal lands. A growing body of literature suggests a path to increase the adoption of agroforestry in the Midwest U.S. lies in the incorporation of low-input food-producing tree species that provide economic incentives for farmers. Studies of the system-level integration of such approaches have proceeded by using the currently available cultivars and breeding selections of various tree nut and fruit species. While existing varieties and breeding selections provide the opportunity for initial system development and integration, their broad adaptability to the Midwest U.S. and its marginal land-types is unexplored. Thus, a second tier of research includes the genetic improvement and adaptation of tree crop selections to their respective target environments throughout the Midwest U.S. Fortunately, select tree crops of interest are amendable to systematic breeding and have wild relatives that are endemic across the region. In this paper, we discuss the value of these wild relatives for broadening the adaption of cultivated tree crop selections by using the hazelnut as an example species. We present a framework using geospatial tools to define and prioritize target environments for breeding and, in turn, exploiting wild relative germplasm.

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“…European hazelnut ( Corylus avellana L.) is a diploid (2n = 22), monecious, dichogamous, self-incompatible, perennial, wind-pollinated species belonging to the Betulaceae family, and can be grown in bush form or from a single trunk ( Brown et al, 2016 ; Öztürk et al, 2017b ). European hazelnut is commercially important for its nuts.…”

Section: Introductionmentioning

confidence: 99%

“…Randomly amplified polymorphic DNA (RAPD), intersimple sequence repeat (ISSR), and amplified fragment length polymorphism (AFLP) markers have also been used to characterize the relatedness between Turkish hazelnut varieties ( Kafkas et al, 2009 ; Erdoğan et al, 2010 ). Öztürk et al (2017b) also studied the Turkish national hazelnut collection to identify genetic diversity and population structure, as well as selecting a core set which includes the most diverse accessions. This collection consists of 402 different accessions collected from the Black Sea Region including cultivars, landraces and wild accessions, which were classified using SSR markers ( Öztürk et al, 2017b ).…”

Section: Introductionmentioning

confidence: 99%

Unraveling Genetic Diversity Amongst European Hazelnut (Corylus avellana L.) Varieties in Turkey

et al. 2021

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European hazelnut (Corylus avellana) is a diploid (2n = 22), monecious and wind-pollinated species, extensively cultivated for its nuts. Turkey is the world-leading producer of hazelnut, supplying 70–80% of the world’s export capacity. Hazelnut is mostly grown in the Black Sea Region, and maintained largely through clonal propagation. Understanding the genetic variation between hazelnut varieties, and defining variety-specific and disease resistance-associated alleles, would facilitate hazelnut breeding in Turkey. Widely grown varieties ‘Karafındık’ (2), ‘Sarıfındık’ (5), and ‘Yomra’ (2) were collected from Akçakoca in the west, while ‘Tombul’ (8), ‘Çakıldak’ (3), ‘Mincane’ (2), ‘Allahverdi’ (2), ‘Sivri’ (4), and ‘Palaz’ (5) were collected from Ordu and Giresun provinces in the east (numbers in parentheses indicate sample sizes for each variety). Powdery mildew resistant and susceptible hazelnut genotypes were collected from the field gene bank and heavily infected orchards in Giresun. Every individual was subjected to double digest restriction enzyme-associated DNA sequencing (ddRAD-seq) and a RADtag library was created. RADtags were aligned to the ‘Tombul’ reference genome, and Stacks software used to identify polymorphisms. 101 private and six common alleles from nine hazelnut varieties, four private from resistants and only one from susceptible were identified for diagnosis of either a certain hazelnut variety or powdery mildew resistance. Phylogenetic analysis and population structure calculations indicated that ‘Mincane’, ‘Sarıfındık’, ‘Tombul’, ‘Çakıldak’, and ‘Palaz’ were genetically close to each other; however, individuals within every varietal group were found in different sub-populations. Our findings indicated that years of clonal propagation of some preferred varieties across the Black Sea Region has resulted in admixed sub-populations and great genetic diversity within each variety. This impedes the development of a true breeding variety. For example, ‘Tombul’ is the most favored Turkish variety because of its high quality nuts, but an elite ‘Tombul’ line does not yet exist. This situation continues due to the lack of a breed protection program for commercially valuable hazelnut varieties. This study provides molecular markers suitable for establishing such a program.

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Molecular genetic diversity of the Turkish national hazelnut collection and selection of a core set

Cited by 21 publications

References 34 publications

Natural Variation of Hazelnut Allergenicity: Is There Any Potential for Selecting Hypoallergenic Varieties?

Natural Variation of Hazelnut Allergenicity: Is There Any Potential for Selecting Hypoallergenic Varieties?

Germplasm Development of Underutilized Temperate U.S. Tree Crops

Unraveling Genetic Diversity Amongst European Hazelnut (Corylus avellana L.) Varieties in Turkey

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