Abstract
The nematodes are important biotic constraint in rain-fed wheat production systems. In Turkey, they is found in 75.0% of soil samples in Central Anatolia with the dominant species being Heterodera filipjevi. Yield losses for winter wheat in rain-fed environments are documented between 27.0-46.0%. A single dominant gene for resistance to H. avenae, designated as Cre1, was assessed in Turkey. It was also found to be effective to Heterodera filipjevi. In this research, a STS based Cre1 marker was applied in a number of segregating wheat populations from F1 to F4 to discriminate Cre1-positive lines among the wheat populations. Results clearly indicated that Marker Assisted Selection (MAS) is functioning effectively, with recovery of Cre1 positive lines up to 88.0 % depending on the cross in early stage of breeding.
Highlights
Turkey, with 8.95 million hectare acreage, 17.78 million tons production and 2.2 tons per hectare yield, is one of the largest wheat producers in the world (FAO, 2008)
Preliminary yield loss studies indicate that H. filipjevi, which is a common nematode species in Turkey, has resulted in up to 50% yield loss of Turkish common bread wheat cultivars (Nicol et al, 2005)
Cy of Marker Assisted Selection (MAS) in the different stages of segregation populations of bread wheat which were generated by the International Winter Wheat Improvement Program-TURKEY, CIMMYT, ICARDA (IWWIP)
Summary
With 8.95 million hectare acreage, 17.78 million tons production and 2.2 tons per hectare yield, is one of the largest wheat producers in the world (FAO, 2008). One third of this acreage is under rainfed conditions and the main aims of wheat breeding in these conditions are to develop new wheat cultivars tolerant to biotic and abiotic stress factors. Preliminary yield loss studies indicate that H. filipjevi, which is a common nematode species in Turkey, has resulted in up to 50% yield loss of Turkish common bread wheat cultivars (Nicol et al, 2005). Cy of Marker Assisted Selection (MAS) in the different stages of segregation populations of bread wheat which were generated by the International Winter Wheat Improvement Program-TURKEY, CIMMYT, ICARDA (IWWIP)
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