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Journals / Turkish Journal of Biodiversity / 2025 / Cilt: 8 Sayı: 2

Morphological and molecular characterization of Myzocallis coryli on Corylus avellana in Artvin (Türkiye)

Türkiye'nin Artvin bölgesinde Corylus avellana üzerinde yetişen Myzocallis coryli'nin morfolojik ve moleküler karakterizasyonu

Hayal Akyıldırım Beğen(ARTVİN ÇORUH ÜNİVERSİTESİ, SAĞLIK HİZMETLERİ MESLEK YÜKSEKOKULU)0000-0003-2028-5827
Didem Tunalı(ARTVİN ÇORUH ÜNİVERSİTESİ)0009-0001-4595-4444
Pages
52–63
Publication Date
2025-12-31
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The estimated crown age of Myzocallis is approximately 0.38–0.45 million years ago (Ma), indicating a relatively recent diversification during the Late Pleistocene.

📌 3 Key Takeaways

🎯
Objective & Hypothesis:This study aims to identify aphid species observed on hazelnut (Corylus avellana) trees in Artvin and to characterize them at the molecular level.
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Key Findings & Data:Molecular analyses using COI gene region with Neighbour Joining (NJ) methods demonstrated that the resulting tree topologies were consistent with one another and that species-level distinctions were clearly resolved.
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Conclusion & Impact:The estimated crown age of Myzocallis is approximately 0.38–0.45 million years ago (Ma), indicating a relatively recent diversification during the Late Pleistocene.
🔬Design:Survey & Empirical Study
📍Scope:Comprehensive Sample
⚙️Variables:Artvin · Corylus avellana · fındık

Abstract

This study aims to identify aphid species observed on hazelnut (Corylus avellana) trees in Artvin and to characterize them at the molecular level. Field surveys conducted in the districts of Borçka, Kemalpaşa, Arhavi, and Hopa revealed that the species Myzocallis coryli was present in all regions at low densities , remaining well below the economic damage threshold. Molecular analyses using COI gene region with Neighbour Joining (NJ) methods demonstrated that the resulting tree topologies were consistent with one another and that species-level distinctions were clearly resolved. Individuals of M. coryli collected from different districts in Türkiye were included in the ML analysis together with reference sequences obtained from the GenBank database. Samples from Hopa, Arhavi, and Kemalpaşa clustered within the same clade as the reference sequences with high bootstrap support (99%), confirming that the specimens belong to the species M. coryli in accordance with morphological identifications. The close proximity of the three populations also indicates low intraspecific genetic variation among Turkish populations. The estimated crown age of Myzocallis is approximately 0.38–0.45 million years ago (Ma), indicating a relatively recent diversification during the Late Pleistocene.

Özet

Bu çalışma, Artvin’deki fındık (Corylus avellana) ağaçlarında görülen afit türlerinin belirlenmesi ve moleküler düzeyde karakterizasyonunu amaçlamaktadır. Borçka, Kemalpaşa, Arhavi ve Hopa ilçelerinde yürütülen arazi çalışmalarında Myzocallis coryli türünün tüm bölgelerde düşük yoğunlukta bulunduğu ve ekonomik zarar eşiğinin oldukça altında kaldığı tespit edilmiştir. Neighbour Joining (NJ), Maximum Likelihood (ML) ve Bayesian Inference (BI) analizleri ile COI gen bölgesi kullanılarak yapılan moleküler analizlerde, elde edilen ağaç topolojilerinin birbirleriyle uyumlu olduğu ve türler arasındaki ayrımın net biçimde yapıldığı görülmüştür. Türkiye’nin farklı ilçelerinden toplanan M. coryli bireyleri, GenBank veri tabanındaki referans sekanslarla birlikte ML analizine dâhil edilmiştir. Hopa, Arhavi ve Kemalpaşa örnekleri, referans dizilerle yüksek bootstrap desteği (%99) altında aynı klad içinde kümelenmiş, bu durum örneklerin morfolojik tanımlamalarla uyumlu biçimde M. coryli türüne ait olduğunu doğrulamıştır. Ayrıca üç popülasyonun birbirine yakın konumlanması, Türkiye’de tür içi genetik varyasyonun düşük olduğunu göstermektedir. Myzocallis cinsinin tahmini taç yaşı yaklaşık 0,38–0,45 milyon yıl önce (My) olup, bu durum Geç Pleyistosen sırasında gerçekleşen görece yakın zamanlı bir çeşitlenmeye işaret etmektedir.

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Cite This Article

Beğen, H. A., Tunalı, D. (2025). Morphological and molecular characterization of Myzocallis coryli on Corylus avellana in Artvin (Türkiye). Turkish Journal of Biodiversity, Cilt: 8 Sayı: 2, 52–63. https://doi.org/10.38059/biodiversity.1841725

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