Theoretical and Applied Genetics

, Volume 116, Issue 7, pp 891–902 | Cite as

Genetic and QTL analyses of seed dormancy and preharvest sprouting resistance in the wheat germplasm CN10955

  • F. C. Ogbonnaya
  • M. Imtiaz
  • G. Ye
  • P. R. Hearnden
  • E. Hernandez
  • R. F. Eastwood
  • M. van Ginkel
  • S. C. Shorter
  • J. M. Winchester
Original Paper


The inheritance and genetic linkage analysis for seed dormancy and preharvest sprouting (PHS) resistance were carried out in an F8 recombinant inbred lines (RILs) derived from the cross between “CN19055” (white-grained, PHS-resistant) with locally adapted Australian cultivar “Annuello” (white-grained, PHS-susceptible). Seed dormancy was assessed as germination index (GI7) while assessment for preharvest sprouting resistance was based on whole head assay (sprouting index, SI) and visibly sprouted seeds (VI). Segregation analysis of the F2, F3 data from the glasshouse and the RIL population in 2004 and 2005 field data sets indicated that seed dormancy and PHS resistance in CN19055 is controlled by at least two genes. Heritabilities for GI7 and VI were high and moderate for SI. The most accurate method for assessing PHS resistance was achieved using VI and GI7 while SI exhibited large genotype by environment interaction. Two quantitative trait loci (QTLs) QPhs.dpivic.4A.1 and QPhs.dpivic.4A.2 were identified. On pooled data across four environments, the major QTL, QPhs.dpivic.4A.2, explained 45% of phenotypic variation for GI7, 43% for VI and 20% for SI, respectively. On the other hand, QPhs.dpivic.4A.1 which accounted for 31% of the phenotypic variation in GI7 in 2004 Horsham field trial, was not stable across environments. Physical mapping of two SSR markers, Xgwm937 and Xgwm894 linked to the major QTL for PHS resistance, using Chinese Spring deletions lines for chromosome 4AS and 4AL revealed that the markers were located in the deletion bins 4AL-12 and 4AL-13. The newly identified SSR markers (Xgwm937/Xgwm894) showed strong association with seed dormancy and PHS resistance in a range of wheat lines reputed to possess PHS resistance. The results suggest that Xgwm937/Xgwm894 could be used in marker-assisted selection (MAS) for incorporating preharvest sprouting resistance into elite wheat cultivars susceptible to PHS.


Seed Dormancy Germination Index Wheat Germplasm Deletion Line Synthetic Hexaploid Wheat 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



The authors would like to thank Jayne Wilson, Jacinta Bull, Rachel Ivess, David Burch, Erica Steadman and Julie Eder for their technical assistance. Dr. Evans Lagudah is gratefully acknowledged for supplying DNA of the wheat aneuploid lines. Department of Primary Industries, Victoria, Grains Research and Development Cooperation and CRC for Molecular Plant Breeding supported this research.


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Copyright information

© Springer-Verlag 2008

Authors and Affiliations

  • F. C. Ogbonnaya
    • 1
    • 2
    • 3
  • M. Imtiaz
    • 1
    • 2
    • 3
  • G. Ye
    • 1
    • 2
  • P. R. Hearnden
    • 4
  • E. Hernandez
    • 5
  • R. F. Eastwood
    • 6
  • M. van Ginkel
    • 1
    • 2
    • 3
  • S. C. Shorter
    • 7
  • J. M. Winchester
    • 7
  1. 1.Department of Primary IndustriesPrimary Industries Research Victoria (PIRVic)HorshamAustralia
  2. 2.Molecular Plant Breeding CRCLatrobe UniversityBundooraAustralia
  3. 3.International Centre for Agricultural Research in the Dry Areas (ICARDA)AleppoSyria
  4. 4.School of Agriculture and WineUniversity of AdelaideGlen OsmondAustralia
  5. 5.International Maize and Wheat Improvement Center (CIMMYT)El BatanMexico
  6. 6.Australian Grain TechnologyHorshamAustralia
  7. 7.NZ Institute for Crop and Food Research LimitedChristchurchNew Zealand

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