Küllemeye dayanıklılıkta kavun genotipleri arasında genetik varyasyon

Year 2020, Volume: 37 Issue: 1, 57 - 63, 01.06.2020

Abdullah Ünlü

https://doi.org/10.16882/derim.2020.721922

Abstract

Podosphaera xanthii'nin neden olduğu külleme hastalığı kavunda önemli ekonomik verim kayıplarına yol açmaktadır. Hastalık Türkiye dışında Asya, Avrupa ve Amerika’da kavun yetiştirilen tüm alanlarda etkili olmaktadır. Biyolojik ve kimyasal metotlarla mücadele ile kontrol altına alınmaya çalışılsa da tam bir başarı elde edilememektedir. Bu nedenle genetik olarak dayanıklı çeşitlerin geliştirilmesi önemlidir. Hastalık etmeninin bilinen ve en yaygın olan üç ırkı (ırk 1, 2 ve 5) vardır. Bu çalışmada Podosphaera xanthii'nin Türkiye’de en yaygın olan 5 nolu ırkına karşı 140 adet kavun genotipi test edilerek dayanıklılıkta genotipik varyasyon araştırılmıştır. Hastalık testlemesi, klasik olarak, iklim kontrollü kompartmanda, bitkiler fide döneminde iken gerçekleştirilmiş, hastalık belirtileri inokülasyonun 5., 10. ve 15. gününde 1-4 skalasına göre değerlendirilmiştir. Deneme iki tekerrürlü olarak kurulmuş ve her tekerrürde 6 bitki test edilmiştir. Test sonuçlarına göre genotipler arasında küllemeye dayanıklılık bakımından önemli varyasyonlar tespit edilmiştir.

Keywords

Podosphaera xanthii, ırk, inokülasyon, patojen

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