Doubled Haploids

2009 ◽  
pp. 127-142 ◽  
Author(s):  
Ming-Tang Chang ◽  
Edward H. Coe
Keyword(s):  
Doubled Haploids

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.

Androgenetic vs. Gynogenetic Doubled Haploids of Tobacco

Crop Science ◽  
1989 ◽  
Vol 29 (5) ◽  
pp. 1151-1155 ◽  
Author(s):  
E. A. Wernsman ◽  
D. F. Matzinger ◽  
Rebeca C. Rufty
Keyword(s):  
Doubled Haploids

Production of Haploids and Doubled Haploids of the Amphiploids Aegilops Variabilis × Secale Cereale

2002 ◽  
Vol 30 (1-2) ◽  
pp. 39-45 ◽  
Author(s):  
Aleksandra Ponitka ◽  
Aurelia Ślusarkiewicz-Jarzina ◽  
Barbara Wojciechowska
Keyword(s):  
Secale Cereale ◽  
Doubled Haploids ◽  
Aegilops Variabilis

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

scholarly journals Vernalization response of winter x spring wheat derived doubled-haploids

2012 ◽  
Vol 7 (48) ◽  
pp. 6465-6473 ◽  
Author(s):  
Sharma Shivali ◽  
Sharma Rajan ◽  
Chaudhary HK
Keyword(s):  
Spring Wheat ◽  
Doubled Haploids ◽  
Vernalization Response

Production of Doubled Haploids in Brassica

2008 ◽  
pp. 65-73 ◽  
Author(s):  
J. Gil-Humanes ◽  
F. Barro
Keyword(s):  
Doubled Haploids

scholarly journals Double Haploid Development and Assessment of Androgenic Competence of Balkan Pepper Core Collection in Bulgaria

Plants ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 2414
Author(s):  
Stanislava Grozeva ◽  
Gancho Pasev ◽  
Vesela Radeva-Ivanova ◽  
Velichka Todorova ◽  
Valentina Ivanova ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
Double Haploid ◽  
Genetic Improvement ◽  
Core Collection ◽  
Culture Medium ◽  
Doubled Haploids ◽  
Caps Marker ◽  
Regenerated Plants ◽  
Direct Embryogenesis ◽  
Pepper Breeding

This study was designed to assess the androgenic potential of 180 pepper accessions and 11 progenies (four F1 and seven BC) possessing PMMoV resistance in order to complement an ongoing pepper breeding program. The experiment was carried out in 10 replications with 20 anthers for each accession in two different induction mediums from 2017 to 2019. The highest androgenic response was observed in culture medium 17-2 but differences between two mediums were nonsignificant. From a total of 191 genotypes, 102 genotypes expressed a potential for direct embryogenesis. Embryo induction was seen to be genotype-dependent and decreased in the following order: Pumpkin > Conical > Bell or blocky > Round > Elongate as the most responsive genotypes with over 10% reacted anthers being observed in CAPS-23, CAPS-29, CAPS-127, CAPS-157, CAPS-169, F1 and BC 887 derived from CAPS-23. The number of regenerated plants was higher in the conical group and least in the round varietal group. Regenerated plants were examined visually and by flow cytometry for identification of spontaneous doubled haploids (DH) and haploids. Those originating from F1 and BC progenies were additionally evaluated by a CAPS marker targeting L4 allele for resistance against PMMoV. Obtained results revealed two groups consisting of homozygous susceptible and resistant plants. Therefore, use of anther culture in ongoing breeding will greatly facilitate the pepper genetic improvement.

scholarly journals Comparison of methods for obtaining doubled haploids of carrot

2017 ◽  
Vol 86 (2) ◽  
Author(s):  
Waldemar Kiszczak ◽  
Urszula Kowalska ◽  
Agata Kapuścińska ◽  
Maria Burian ◽  
Krystyna Górecka
Keyword(s):  
Plant Regeneration ◽  
Doubled Haploid ◽  
Aspartate Aminotransferase ◽  
Doubled Haploids ◽  
The Other ◽  
Plant Production ◽  
Comparison Of Methods ◽  
Anther Cultures ◽  
Induction Stage ◽  
Main Factor

Doubled haploid lines of carrot can be obtained through androgenesis in anther cultures and in isolated microspore cultures. The two methods were compared using three carrot cultivars (‘Kazan F1’, ‘Feria F1’, and ‘Narbonne F1’) at the androgenesis induction stage, during plant regeneration from embryos, and during acclimatization of androgenetic plants as well as their characterization. It was found that cultivar was the main factor affecting the efficiency at each stage of plant production in both anther and isolated microspore cultures. The efficiency of androgenesis in anther cultures of ‘Feria F1’ was considerably higher in comparison with isolated microspore cultures, and more plants were obtained from the embryos of androgenesis-cultured plants. In ‘Kazan F1’ and ‘Narbonne F1’, more acclimatized androgenetic plants were produced from anther cultures. Ploidy assessment of acclimatized plants of ‘Narbonne F1’ showed that the majority of the plants in the population derived from anther cultures had a doubled chromosome (DH) set. On the other hand, the majority of plants obtained from isolated microspore cultures were haploids. When assessing homozygosity, it was found among plants obtained in anther cultures that the percentage of homozygotes for phosphoglucose isomerase (PGI) and aspartate aminotransferase (AAT) depended on the cultivar. In contrast, the majority of plants derived from isolated microspore cultures were homozygous regardless of cultivar.

Sign in / Sign up

Export Citation Format

Share Document