Farklı biber (Capsicum annuum L.) genotiplerini iki değişik Fusarium solani L. izolatına karşı dayanıklılık durumlarının belirlenmesi

Örtü altı biber yetistiriciliginde sorun olan toprak kökenli patojenlerden Fusarium solani etmeni biberlerde kök ve gövde çürüklügü olusturarak bitkinin üst aksamlarının solmasına ve buna baglı olarak da bitki ölümlerine neden olmakta ve sonuçta ekonomik kayıplar ortaya çıkmaktadır. Bu çalısmanın amacı, F.solani’ye karsı dayanıklı biber genitörlerin tespit edilmesidir. Çalısmada, biberde kökbogazı yanıklıgı hastalıgına (Phytophthora capsici L.) karsı dayanıklılık çalısması için olusturulan biber gen havuzundan, 25 biber genotipi, Dogu Akdeniz ve Batı Akdeniz Bölgesinde örtü altı biber yetistiriciligi yapılan alanlardan izole edilen iki izolatla (AZMFS, NFS) dayanıklılık testine tabi tutulmuslardır. Yapılan testleme sonucunda 25 genotipin 6 tanesi (PBC-178, PBC-1364,PBC 413, PM-702, CM-334, PM-217) F.solani’nin her iki izolatına karsı dayanıklı bulunmustur. Her iki izolata karsı, Habenero ve Bagcı çarliston biber genotipleri en duyarlı genotip olarak belirlenmistir. Fusarium solani’ye dayanıklı CMM-334, PBC-178, PM-702 genotiplerinin P.capsici’ye karsı da dayanıklı bulunmaları ıslah çalısmaları için oldukça önemlidir.

Determine the genotypes resistant to Fusarium solani in pepper (Capsicum annuum L.)

Fusarium solani, a soil-born pathogen, is one of the most important disease problems in greenhouse pepper production. The disease causes root and stem roots, ultimately leading wilting symptoms on upper parts of the plant and significant economic losses. Due to limited effectiveness of cultural practices and expense, environmental problems associated with pesticides, host plant resistance appears as a promising alternative for protection. One of the first steps in host plant resistance is to establish resistant germplasm. In current study, two isolates of F. solani (AZMFS, NFS) originated from the greenhouse pepper cultures in east and west Mediterranean regions were used to test 25 pepper germplasm previously selected for Phytophthora capsici L. resistance. Six of the 25 germplasm (PBC-178, PBC-1364, PBC 413, PM-702, CM-334, PM-217) were found to be resistant to two isolates of F. solani. The most susceptible germplasms were Habenero and Bagci (Carliston type germplasm). The cross resistance of the germplasms, CMM-334, PBC-178, PM-702, to F. solani and P capsici is promising for developing breeding programs.

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