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Published online 20 May 2008
Published in Crop Sci 48:911-922 (2008)
© 2008 Crop Science Society of America
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Alternative Recurrent Selection Strategies Using Doubled Haploid Lines in Hybrid Maize Breeding

G. Andres Gordillo and Hartwig H. Geiger*

Univ. of Hohenheim, Institute of Plant Breeding, Seed Science, and Population Genetics, D-70593 Stuttgart, Germany


Figure 1
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Figure 1. Flow chart of the optimized recurrent selection scheme based on doubled haploid lines.

 

Figure 2
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Figure 2. Interlinking Strategy 1 using superior lines from the subpopulation started 1 yr before the subpopulation under consideration, exemplified for two-stage testcross selection. RE, recombination; TC1 and TC2, first and second testcross evaluation, respectively.

 

Figure 3
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Figure 3. Interlinking Strategy 2 using superior lines from the subpopulation started 1 yr after the subpopulation under consideration, exemplified for two-stage testcross selection. RE, recombination; TC1 and TC2, first and second testcross evaluation, respectively.

 

Figure 4
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Figure 4. Annual genetic gain with interlinking Strategies 1 and 2 under the standard ratio of variance components (Scenario II) as a function of the proportion of lines selected from staggered Subpopulation {Pi}j (P{Pi}J). An arrow ({downarrow}) identifies the maximum for each recurrent selection procedure.

 





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