Identification of wheat genetic resistance sources to the cereal nematode complex including the root lesion nematode (Pratylenchus thornei and P. neglectus) and cereal cyst nematode (Heterodera avenae)
Material type:
TextPublication details: Wageningen (Netherlands) European Society of Nematologists : 2010Description: p. 139Summary: Both the sedentary Cereal Cyst Nematode (CCN) and migratory Root Lesion Nematode (RLN) are known to be economically important nematodes of wheat production systems, particularly under rainy environments such as West Asia and North Africa. The main species of importance on spring wheat production systems in these locations is the CCN species Heterodera avenae and the two root lesion nematode species Pratylenchus thornei and P. neglectus. In Turkey and several countries within the region they commonly occur together in cereal production systems and one of the most cost effective and economically feasible options for their control is through the identification of genetic host resistance against one or more of these nematodes. CIMMYT International in Mexico have exploited many sources of identified resistance, which now have entered the international wheat nursery for distribution to wheat breeding programmes globally called the 27th Semi Arid Wheat Screening Nursery. Forty five lines of this nursery were screened under controlled in vitro conditions against the three species (H. avenae, P. thornei and P. neglectus) under a joint CIMMYT Turkey collaboration. Seven replicates of each line were pre- germinated and planted individually in open small tubes filled with soil grown under controlled in vitro conditions arranged as a randomised complete block design. Each tube was inoculated with either 400 P. thornei, P. neglectus or 200 H. avenae juveniles. Plants were harvested after 9 weeks, and numbers of CCN cysts or RLN per plant and soil were counted and resistance was assessed based on known standard lines. Preliminary results indicate more than 73% of the nursery lines have moderate resistance to one of these nematodes. Five entries (11%) of the nursery had moderate resistance to all three nematodes, 14 entries (31%) had moderate resistance against two of the nematodes, and similarly 14 entries (31%) against one nematode. This data requires further validation but suggests many valuable sources of resistance are available. This nursery has been globally distributed by CIMMYT Mexico and contains high yielding adapted materials which can be validated by other pathology programmes and used for future wheat improvement activities.
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|---|---|---|---|---|---|---|---|---|
| Conference proceedings | CIMMYT Knowledge Center: John Woolston Library | CIMMYT Staff Publications Collection | CIS-6206 (Browse shelf(Opens below)) | Available |
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Abstract only
Both the sedentary Cereal Cyst Nematode (CCN) and migratory Root Lesion Nematode (RLN) are known to be economically important nematodes of wheat production systems, particularly under rainy environments such as West Asia and North Africa. The main species of importance on spring wheat production systems in these locations is the CCN species Heterodera avenae and the two root lesion nematode species Pratylenchus thornei and P. neglectus. In Turkey and several countries within the region they commonly occur together in cereal production systems and one of the most cost effective and economically feasible options for their control is through the identification of genetic host resistance against one or more of these nematodes. CIMMYT International in Mexico have exploited many sources of identified resistance, which now have entered the international wheat nursery for distribution to wheat breeding programmes globally called the 27th Semi Arid Wheat Screening Nursery. Forty five lines of this nursery were screened under controlled in vitro conditions against the three species (H. avenae, P. thornei and P. neglectus) under a joint CIMMYT Turkey collaboration. Seven replicates of each line were pre- germinated and planted individually in open small tubes filled with soil grown under controlled in vitro conditions arranged as a randomised complete block design. Each tube was inoculated with either 400 P. thornei, P. neglectus or 200 H. avenae juveniles. Plants were harvested after 9 weeks, and numbers of CCN cysts or RLN per plant and soil were counted and resistance was assessed based on known standard lines. Preliminary results indicate more than 73% of the nursery lines have moderate resistance to one of these nematodes. Five entries (11%) of the nursery had moderate resistance to all three nematodes, 14 entries (31%) had moderate resistance against two of the nematodes, and similarly 14 entries (31%) against one nematode. This data requires further validation but suggests many valuable sources of resistance are available. This nursery has been globally distributed by CIMMYT Mexico and contains high yielding adapted materials which can be validated by other pathology programmes and used for future wheat improvement activities.
Global Wheat Program
English
Lucia Segura
INT2918|INT2410
CIMMYT Staff Publications Collection
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