Turkey is among the few countries in terms of plant diversity. An example of this situation is the variation in walnut seedlings grown from seed throughout the country. The genetic material to be used in fruit breeding should be original and the genetic relations among the genotypes should be well elucidated. In this research, genetic diversity was investigated among the walnut genotypes selected from Uşak province of Turkey with the use of molecular markers. In this study, molecular results showed that the 19 SRAP primer combinations produced, on average, 171 bands in the accessions examined, of which 77.2% were polymorphic. Base lengths of the bands obtained from markers varied between 100-1500 bp. The similarity ratio of walnut genotypes varied between 0.21 – 0.85. According to the results of the study, it was determined that SRAP marker system can be used to determine genetic diversity among walnut genotypes.
Türkiye bitki çeşitliliği bakımından ender ülkeler arasındadır. Bu durumun bir örneği de ülke genelinde tohumdan yetişen ceviz çöğürlerindeki varyasyondur. Bu farklılığın ceviz ıslahında kullanılabilmesi için genetik materyalin ismine doğru olması ve aralarındaki genetik ilişkilerin belirlenmesi büyük önem taşımaktadır. Yapılan bu çalışmada Uşak ilinden seleksiyon ile elde edilmiş bazı ceviz genotiplerinde genetik çeşitliliğin moleküler markörler ile belirlenmesi amaçlanmıştır. Çalışmada 19 adet SRAP markör kombinasyonu kullanılmıştır. Bu markörlerden sayıları 2 ile 18 arasında değişen toplam 171 skorlanabilir bant elde edilmiş olup, bunların %77,2’si polimorfik olarak bulunmuştur. Markörlerden elde edilen bantların baz uzunlukları ise 100-1500 bp arasında değişim göstermiştir. Ceviz genotiplerine ait benzerlik oranı 0,21 – 0,85 arasında değişim göstermiştir. Çalışma sonucuna göre SRAP markör sisteminin ceviz genotipleri arasında genetik çeşitliliği belirlemede etkili şekilde kullanılabileceği tespit edilmiştir.
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