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Genetic Components of Yield Stability in Maize Breeding Populations

E. A. Lee*, T. K. Doerksen and L. W. Kannenberg

University of Guelph, Department of Plant Agriculture, Crop Science Building, Guelph, ON, N1G 2W1 Canada



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  		Fig. 1. Mean grain yield of all population crosses involving either EliteA C0 ({blacktriangleup}) or CA (•), and per se grain yield of either EliteA C0 ({diamondsuit}) or CA ({blacksquare}) populations over six environments. Dashed lines represent the response of the C0 population and solid lines represent the response of the CA population over a range of environments. Environmental index is the grand mean grain yield of the experiment in that environment.

 


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  		Fig. 2. Mean grain yield of all population crosses involving either EliteB C0 ({blacktriangleup}) or CA (•), and per se grain yield of either EliteB C0 ({diamondsuit}) or CA ({blacksquare}) populations over six environments. Dashed lines represent the response of the C0 population and solid lines represent the response of the CA population over a range of environments. Environmental index is the grand mean grain yield of the experiment in that environment.

 


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  		Fig. 3. Mean grain yield of all population crosses involving either Stiff Stalk C0 ({blacktriangleup}) or CA (•), and per se grain yield of either Stiff Stalk C0 ({diamondsuit}) or CA ({blacksquare}) populations over six environments. Dashed lines represent the response of the C0 population and solid lines represent the response of the CA population over a range of environments. Environmental index is the grand mean grain yield of the experiment in that environment.

 


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  		Fig. 4. Mean grain yield of all population crosses involving either Lancaster C0 ({blacktriangleup}) or CA (•), and per se grain yield of either Lancaster C0 ({diamondsuit}) or CA ({blacksquare}) populations over six environments. Dashed lines represent the response of the C0 population and solid lines represent the response of the CA population over a range of environments. Environmental index is the grand mean grain yield of the experiment in that environment.

 


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  		Fig. 5. Mean grain yield of all population crosses involving either Wigor C0 ({blacktriangleup}) or CA (•), and per se grain yield of either Wigor C0 ({diamondsuit}) or CA ({blacksquare}) populations over six environments. Dashed lines represent the response of the C0 population and solid lines represent the response of the CA population over a range of environments. Environmental index is the grand mean grain yield of the experiment in that environment.

 


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  		Fig. 6. Mean grain yield of all population crosses involving either SynA(R) C0 ({blacktriangleup}) or CA (•), and per se grain yield of either SynA(R) C0 ({diamondsuit}) or CA ({blacksquare}) populations over six environments. Dashed lines represent the response of the C0 population and solid lines represent the response of the CA population over a range of environments. Environmental index is the grand mean grain yield of the experiment in that environment.

 


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  		Fig. 7. Mean grain yield of all population crosses involving either CBI C0 ({blacktriangleup}) or CA (•), and per se grain yield of either CBI C0 ({diamondsuit}) or CA ({blacksquare}) populations over six environments. Dashed lines represent the response of the C0 population and solid lines represent the response of the CA population over a range of environments. Environmental index is the grand mean grain yield of the experiment in that environment.

 


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  		Fig. 8. Mean grain yield of all population crosses involving either CBII C0 ({blacktriangleup}) or CA (•), and per se grain yield of either CBII C0 ({diamondsuit}) or CA ({blacksquare}) populations over six environments. Dashed lines represent the response of the C0 population and solid lines represent the response of the CA population over a range of environments. Environmental index is the grand mean grain yield of the experiment in that environment.

 


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  		Fig. 9. Mean grain yield of all population crosses involving either SynB(S) C0 ({blacktriangleup}) or CA (•), and per se grain yield of either SynB(S) C0 ({diamondsuit}) or CA ({blacksquare}) populations over six environments. Dashed lines represent the response of the C0 population and solid lines represent the response of the CA population over a range of environments. Environmental index is the grand mean grain yield of the experiment in that environment.

 


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  		Fig. 10. Mean grain yield of all population crosses involving either SynA(S) C0 ({blacktriangleup}) or CA (•), and per se grain yield of either SynA(S) C0 ({diamondsuit}) or CA ({blacksquare}) populations over six environments. Dashed lines represent the response of the C0 population and solid lines represent the response of the CA population over a range of environments. Environmental index is the grand mean grain yield of the experiment in that environment.

 


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  		Fig. 11. Mean grain yield of all population crosses involving either CCGP A/B C0 ({blacktriangleup}), A CA (•), or B CA ({circ}), and per se grain yield of either CCGP A or B C0 ({diamondsuit}), A CA ({blacksquare}), or B ({square}) populations over six environments. Dashed lines represent the response of the C0 population and solid lines represent the response of the CA populations over a range of environments. Environmental index is the grand mean grain yield of the experiment in that environment.

 




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