Knowledge Center Catalog

Breeding for moisture-stressed areas. Chapter 12

By: Contributor(s): Material type: TextTextPublication details: 1987ISBN:
  • 0-471-91650-1
Subject(s): DDC classification:
  • 94-096634
 In: Srivastava, J.P.; Acevedo,-E.; Varma,-S. (ICARDA, Aleppo (Syria)); Porceddu,-E. (University of Tuscia, Viterbo (Italy). Inst. of Agricultural Biology) (eds.). National Research Council of Italy, Viterbo (Italy); International Center for Agricultural Research in the Dry Areas, Aleppo (Syria). Drought tolerance in winter cereals: proceedings of an international workshop. Chichester (United Kingdom). John Wiley and Sons. 1987. p. 151-161Summary: CIMMYT's approach to breeding for drought resistance is based on wide adaptation, high yield, and stability (i.e. input efficiency and input responsiveness) for semi-arid regions. This approach involves testing of F2, F5, and F6 in optimal conditions, and of F3 and F4 in water stress. The assumption is that high-yield potential at the optimum and stress levels can be combined. This is confirmed by analysis of the input-efficient and input-responsive cultivar Veery 'S', which has a high genetic yield potential and exhibits superior yield performance across the entire range of environments. Methods used at CIMMYT for identifying drought resistance are yield-performance evaluation under reduced irrigation, low-rainfall conditions, gradient irrigation, and multilocational international testing. Wide adaptation, high yield and yield stability - the most important characteristics of CIMMYT germplasm - are derived through the application of the shuttle breeding system in Mexico, using alternate sites of a contrasting nature. High fertility and optimum moisture are applied in the F2, F5, and F6 generations at Ciudad Obregon. The F3 and F4 generations are grown under low fertility and reduced moisture conditions at Huamantha and Cuidad Obregon. Advanced lines produced through this system undergo reduced irrigation, rainfed, and optimum moisture conditions. The lines performing well under all three conditions are internationally tested in various drought environments
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Reprint CIMMYT Knowledge Center: John Woolston Library AGRIS Collection 94-096634 (Browse shelf(Opens below)) Available
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3 tables; 1 fig. 14 ref. Summary (En)

CIMMYT's approach to breeding for drought resistance is based on wide adaptation, high yield, and stability (i.e. input efficiency and input responsiveness) for semi-arid regions. This approach involves testing of F2, F5, and F6 in optimal conditions, and of F3 and F4 in water stress. The assumption is that high-yield potential at the optimum and stress levels can be combined. This is confirmed by analysis of the input-efficient and input-responsive cultivar Veery 'S', which has a high genetic yield potential and exhibits superior yield performance across the entire range of environments. Methods used at CIMMYT for identifying drought resistance are yield-performance evaluation under reduced irrigation, low-rainfall conditions, gradient irrigation, and multilocational international testing. Wide adaptation, high yield and yield stability - the most important characteristics of CIMMYT germplasm - are derived through the application of the shuttle breeding system in Mexico, using alternate sites of a contrasting nature. High fertility and optimum moisture are applied in the F2, F5, and F6 generations at Ciudad Obregon. The F3 and F4 generations are grown under low fertility and reduced moisture conditions at Huamantha and Cuidad Obregon. Advanced lines produced through this system undergo reduced irrigation, rainfed, and optimum moisture conditions. The lines performing well under all three conditions are internationally tested in various drought environments

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