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

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

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.

HETEROZYGOUS ORYZA SATIVA L. DOUBLED HAPLOID GENERATED THROUGH IN VITRO ANDROGENESIS

2021 ◽  
Author(s):  
M.V. Ilyushko ◽  
◽  
M.V. Romashova
Keyword(s):  
Oryza Sativa ◽  
Doubled Haploid ◽  
Oryza Sativa L ◽  
Blast Resistance ◽  
Doubled Haploids ◽  
Resistance Allele ◽  
Blast Resistance Gene ◽  
Somatic Tissues ◽  
Selection For

In the course of marker-assessted selection for the blast resistance gene Pi-b, among 372 rice Oryza sativa L. doubled haploids DH0 geterozygous plant was identified. In the offspring (11 doubled haploids DH1), only Pi-b resistance allele was revealed. The reason for the appearance of false heterozygosity is discussed. By analogy with mixoploidy, an explanation is proposed for the phenomenon of somatic tissues mixogeny.

Doubled haploid versus S1 family recurrent selection for testcross performance in a maize population

2006 ◽  
Vol 112 (6) ◽  
pp. 1063-1072 ◽  
Author(s):  
J. Bordes ◽  
G. Charmet ◽  
R. Dumas de Vaulx ◽  
M. Pollacsek ◽  
M. Beckert ◽  
...  
Keyword(s):  
Doubled Haploid ◽  
Recurrent Selection ◽  
Testcross Performance ◽  
Maize Population ◽  
Selection For
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