Variability of different pear hybrid populations in terms of hybridization performance and the response to fire blight (Erwinia amylovora) attack


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Evrenosoğlu Y., Mısırlı A. , Akçay M. E. , Ünal A., Acarsoy Bilgin N. , Özdemir N., ...Daha Fazla

Notulae Botanicae Horti Agrobotanici Cluj-Napoca, cilt.38, ss.241-247, 2010 (SCI Expanded İndekslerine Giren Dergi)

  • Cilt numarası: 38 Konu: 1
  • Basım Tarihi: 2010
  • Doi Numarası: 10.15835/nbha3814611
  • Dergi Adı: Notulae Botanicae Horti Agrobotanici Cluj-Napoca
  • Sayfa Sayıları: ss.241-247

Özet

The  production  of  pear,  which  is  one  of  the  most  important  fruits  in  Turkey,  was  restricted  by  the  occurrence  of  the  fire  blight disease.  There  isn’t  a  certain  chemical  management  against  fire  blight,  although  plant  activators  have  been  used,  at  present.  It’s  very important to improve resistant varieties in terms of an integrated management of bacterial diseases. With this purpose, different crosses have been made between resistant cultigens and P. communis varieties that have good fruit characteristics. Besides, self-pollination and open  pollination  treatments  have  been  carried  out  in  parental  plants.  Pollen  viability  and  germination  ratio,  fruit  set  ratio,  total  and mean seed number, seed germination ratio, the ratio of hybrid losses by root rot at early stage and the ratio of hybrid losses by natural fire blight infection were determined. The highest values of the properties such as pollen viability and germination ratio, fruit set ratio, mean  and  total  seed  number  were  obtained  from  the  crosses  with  ‘Kaiser  Alexandre’,  ‘Ankara’,  ‘Akça’,  ‘Conference’  and  ‘Santa  Maria’ cultivars, in general. As a result of natural fire blight infection in Izmir-Turkey conditions, the resistance level of the hybrids from various combinations differed through the cultivars used for cross pollination, and it is very important to evaluate these hybrid pear populations through their response to fireblight disease in terms of obtaining new resistant cultivars and using these populations as disease resistant genetic resources in the future.