Doğu Akdeniz Bölgesi’nde doğa koşullarında bazı turunçgil anaçlarının Turunçgil nematodu’na [Tylenchulus semipenetrans (Cobb, 1913) (Tylenchida: Tylenchulidae)] karşı dayanıklılığının araştırılması

Öz

Anaçlar, meyve verimi, kalitesi, abiyotik ve biyotik stres koşullarına karşı tolerans/direnç açısından turunçgil üreticiliğinde önemli bir rol oynamaktadır. Turunçgil üretimini sınırlandıran faktörlerden biri de Tylenchulus semipenetrans (Cobb, 1913) (Tylenchida, Tylenchulidae)’dır. Dayanıklı anaçlar, T. semipenetrans’ın mücadelesinde en iyi seçeneklerden birisi olmuştur. Bu çalışmada Adana ilinde Turunçgil nematodu T. semipenetrans ile doğal olarak bulaşık Çukurova Üniversitesi Turunçgil Koleksiyon parsellerinden, seçilen 54 anaçdan 2012-2016 yılları arasında toprak ve kök örnekleri alınmıştır. Toprak örneklerinden nematodlar, geliştirilmiş Baerman Huni yöntemi kullanılarak ekstrakte edilmiştir ve kök örnekleri asit fuksinle boyanmıştır. Kök ve toprak örnekleri incelendiğinde 17 anaç çeşidin köklerinde ve rizosferdeki toprakta Turunçgil nematoduna çok az rastlanırken, Citrus aurantium L. (Rutaceae)’ye ait 37 anaçtan Tuzcu 31-25T, Tuzcu 31-30T ve Tuzcu 891 hariç diğerlerinde zararlı yoğun olarak bulunmuştur. Anaç kökleri ve rizosferde bulunan Turunçgil nematodunun popülasyon yoğunluğuna göre, Tuzcu 31-25T orta hassas; Tuzcu 31-30T, Nasnaran, Poncirus trifoliata, Kleopatra ant, Local trifoliate, Cloex swingle, Citrumelo 4475, C-35, Gou tou, Sunki, Tuzcu 891, Carrizo citrange dayanıklı; diğer tüm anaçlar hassas olarak tespit edilmiştir. Tüm anaçlar nematod çoğalmasını desteklemiş ancak farklı duyarlılık seviyeleri göstermiştir.

Anahtar Kelimeler

• Carrizo sitranjı
• Citrus aurantium L.
• Poncirus trifoliata
• Cloex swingle
• Kleopatra mandarini
• turunçgil nematodu

Investigation of the resistance of some citrus rootstocks against citrus nematode [Tylenchulus semipenetrans (Cobb, 1913) (Tylenchida: Tylenchulidae)] under field conditions in the Eastern Mediterranean Region

Öz

Rootstocks play a significant role in citriculture in terms of fruit yield, quality, and tolerance/resistance to abiotic and biotic stress conditions. One of the limiting factors to citrus production is Tylenchulus semipenetrans (Cobb, 1913) (Tylenchida, Tylenchulidae). Resistant rootstocks had been one of the best options of choice in the management of T. semipenetrans. In this study, soil and root samples were taken from 54 selected rootstocks from the citrus collection at Cukurova University, which are naturally infested with citrus nematode T. semipenetrans in Adana province between 2012 and 2016. Nematodes were extracted from soil samples using the modified ‘The Baermann Funnel Method’, and root samples were stained by acid fuchsin. When the root and soil samples were examined, citrus nematode was found a few in the roots and rhizosphere soil of 17 rootstock varieties, while it was very intense in rootstocks of Citrus aurantium L. (Rutaceae) except Tuzcu 31-25T, Tuzcu 31-30T, and Tuzcu 891. According to the population density of citrus nematode in rootstock and rhizosphere, Tuzcu 31-25T moderately susceptible; Tuzcu 31-30T, Nasnaran, Poncirus trifoliata, Cleopatra ant, Local trifoliate Cloex swingle, Citrumelo 4475, C-35, Gou tou, Sunki, Tuzcu 891, Carrizo citrange resistant; all other rootstocks were identified as susceptible. All rootstocks supported nematode reproduction but showed different levels of susceptibility.

Anahtar Kelimeler

• Carrizo citrange
• Citrus aurantium L.
• Poncirus trifoliata
• Cloex swingle
• Cleopatra mandarin
• citrus nematode

Kaynakça

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