Hybrid maize breeding with doubled haploids. IV. Number versus size of crosses and importance of parental selection in two-stage selection for testcross performance

2008 ◽  
Vol 117 (2) ◽  
pp. 251-260 ◽  
Author(s):  
Thilo Wegenast ◽  
C. Friedrich H. Longin ◽  
H. Friedrich Utz ◽  
Albrecht E. Melchinger ◽  
Hans Peter Maurer ◽  
...  
Keyword(s):  
Doubled Haploids ◽  
Maize Breeding ◽  
Two Stage ◽  
Parental Selection ◽  
Testcross Performance ◽  
Selection For ◽  
Hybrid Maize

Hybrid maize breeding with doubled haploids: I. One-stage versus two-stage selection for testcross performance

2006 ◽  
Vol 112 (5) ◽  
pp. 903-912 ◽  
Author(s):  
C. Friedrich H. Longin ◽  
H. Friedrich Utz ◽  
Jochen C. Reif ◽  
Wolfgang Schipprack ◽  
Albrecht E. Melchinger
Keyword(s):  
Doubled Haploids ◽  
Stage Versus ◽  
Maize Breeding ◽  
Two Stage ◽  
Testcross Performance ◽  
One Stage ◽  
Selection For ◽  
Hybrid Maize

Hybrid maize breeding with doubled haploids: III. Efficiency of early testing prior to doubled haploid production in two-stage selection for testcross performance

2007 ◽  
Vol 115 (4) ◽  
pp. 519-527 ◽  
Author(s):  
C. Friedrich H. Longin ◽  
H. Friedrich Utz ◽  
Jochen C. Reif ◽  
Thilo Wegenast ◽  
Wolfgang Schipprack ◽  
...  
Keyword(s):  
Doubled Haploid ◽  
Doubled Haploids ◽  
Maize Breeding ◽  
Two Stage ◽  
Testcross Performance ◽  
Haploid Production ◽  
Early Testing ◽  
Selection For ◽  
Hybrid Maize

scholarly journals Erratum to: Hybrid maize breeding with doubled haploids: V. Selection strategies for testcross performance with variable sizes of crosses and S1 families

2010 ◽  
Vol 121 (7) ◽  
pp. 1391-1393 ◽  
Author(s):  
Thilo Wegenast ◽  
H. Friedrich Utz ◽  
C. Friedrich H. Longin ◽  
Hans Peter Maurer ◽  
Baldev S. Dhillon ◽  
...  
Keyword(s):  
Doubled Haploids ◽  
Maize Breeding ◽  
Testcross Performance ◽  
Selection Strategies ◽  
Hybrid Maize

Hybrid maize breeding with doubled haploids: V. Selection strategies for testcross performance with variable sizes of crosses and S1 families

2009 ◽  
Vol 120 (4) ◽  
pp. 699-708 ◽  
Author(s):  
Thilo Wegenast ◽  
H. Friedrich Utz ◽  
C. Friedrich H. Longin ◽  
Hans Peter Maurer ◽  
Baldev S. Dhillon ◽  
...  
Keyword(s):  
Doubled Haploids ◽  
Maize Breeding ◽  
Testcross Performance ◽  
Selection Strategies ◽  
Hybrid Maize

Hybrid maize breeding with doubled haploids: Comparison between selection criteria

2006 ◽  
Vol 54 (3) ◽  
pp. 343-350 ◽  
Author(s):  
C. F. H. Longin ◽  
H. F. Utz ◽  
A. E. Melchinger ◽  
J.C. Reif
Keyword(s):  
Selection Criteria ◽  
Doubled Haploids ◽  
Optimum Allocation ◽  
Finite Sample ◽  
Sample Sizes ◽  
Maize Breeding ◽  
Selection Gain ◽  
Breeding Programmes ◽  
Hybrid Maize ◽  
Breeding Resources

The optimum allocation of breeding resources is crucial for the efficiency of breeding programmes. The objectives were to (i) compare selection gain ΔGk for finite and infinite sample sizes, (ii) compare ΔGk and the probability of identifying superior hybrids (Pk), and (iii) determine the optimum allocation of the number of hybrids and test locations in hybrid maize breeding using doubled haploids. Infinite compared to finite sample sizes led to almost identical optimum allocation of test resources, but to an inflation of ΔGk. This inflation decreased as the budget and the number of finally selected hybrids increased. A reasonable Pk was reached for hybrids belonging to the q = 1% best of the population. The optimum allocations for Pk(q) and ΔGkwere similar, indicating that Pk(q) is promising for optimizing breeding programmes.

Improvement of effectiveness in maize breeding

2006 ◽  
Vol 54 (3) ◽  
pp. 351-358 ◽  
Author(s):  
P. Pepó
Keyword(s):  
Recurrent Selection ◽  
Genetic Manipulation ◽  
Field Testing ◽  
Tissue Cultures ◽  
Maize Breeding ◽  
Breeding Programmes ◽  
Speed Up ◽  
Selection For

Plant regeneration via tissue culture is becoming increasingly more common in monocots such as maize (Zea mays L.). Pollen (gametophytic) selection for resistance to aflatoxin in maize can greatly facilitate recurrent selection and the screening of germplasm for resistance at much less cost and in a shorter time than field testing. In vivo and in vitro techniques have been integrated in maize breeding programmes to obtain desirable agronomic attributes, enhance the genes responsible for them and speed up the breeding process. The efficiency of anther and tissue cultures in maize and wheat has reached the stage where they can be used in breeding programmes to some extent and many new cultivars produced by genetic manipulation have now reached the market.

scholarly journals Selection Signatures Underlying Dramatic Male Inflorescence Transformation During Modern Hybrid Maize Breeding

Genetics ◽  
2018 ◽  
Vol 210 (3) ◽  
pp. 1125-1138 ◽  
Author(s):  
Joseph L. Gage ◽  
Michael R. White ◽  
Jode W. Edwards ◽  
Shawn Kaeppler ◽  
Natalia de Leon
Keyword(s):  
Selection Signatures ◽  
Maize Breeding ◽  
Male Inflorescence ◽  
Hybrid Maize
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