Wheat genetic diversity trends during domestication and breeding

Abstract

It has been claimed that plant breeding reduces genetic diversity in elite germplasm which could seriously jeopardize the continued ability to improve crops. The main objective of this study was to examine the loss of genetic diversity in spring bread wheat during (1) its domestication, (2) the change from traditional landrace cultivars (LCs) to modern breeding varieties, and (3) 50 years of international breeding. We studied 253 CIMMYT or CIMMYT-related modern wheat cultivars, LCs, and Triticum tauschii accessions, the D-genome donor of wheat, with 90 simple sequence repeat (SSR) markers dispersed across the wheat genome. A loss of genetic diversity was observed from T. tauschii to the LCs, and from the LCs to the elite breeding germplasm. Wheat’s genetic diversity was narrowed from 1950 to 1989, but was enhanced from 1990 to 1997. Our results indicate that breeders averted the narrowing of the wheat germplasm base and subsequently increased the genetic diversity through the introgression of novel materials. The LCs and T. tauschii contain numerous unique alleles that were absent in modern spring bread wheat cultivars. Consequently, both the LCs and T. tauschii represent useful sources for broadening the genetic base of elite wheat breeding germplasm.

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References

  1. Anonymous (1972) Genetic vulnerability of major crops. National Academy of Sciences, Washington, D.C.

  2. Cox TS, Murphy JP, Rodgers DM (1986) Changes in genetic diversity in the red and winter wheat regions of the United States. Proc Natl Acad Sci USA 83:5583–5586

    PubMed  Article  CAS  Google Scholar 

  3. Cox TS, Wilson WJ, Gill DL, Leath S, Bockus WW, Browder LE (1992) Resistance to foliar diseases in a collection of Triticum tauschii germplasm. Plant Dis 76:1061–1064

    Article  Google Scholar 

  4. Dalrymple DG (1986) Development and spread of high-yielding wheat varieties in developing countries, 7th edn. US Agency for International Development, Washington, D.C.

    Google Scholar 

  5. Devos KM, Bryan GJ, Collins AJ, Stephenson P, Gale MD (1995) Application of two microsatellite sequences in wheat storage proteins as molecular markers. Theor Appl Genet 90:247–252

    PubMed  Article  CAS  Google Scholar 

  6. Dreisigacker S, Zhang P, Warburton M, Skovmand B, Hoisington D, Melchinger AE (2004a) Genetic diversity among and within CIMMYT wheat landrace accessions investigated with SSRs and implications for plant genetic resources management. Crop Sci (in press)

  7. Dreisigacker S, Zhang P, Warburton M, Skovmand B, Hoisington D, Melchinger AE (2004b) SSR and pedigree analyses of genetic diversity among CIMMYT wheat lines targeted to different megaenvironments. Crop Sci 44:381–388

    Article  CAS  Google Scholar 

  8. Dvorák J, Luo MC, Yang ZL, Zhang HB (1998) The structure of the Aegilops tauschii genepool and the evolution of hexaploid wheat. Theor Appl Genet 97:657–670

    Article  Google Scholar 

  9. Evenson RE, Gollin D (2003) Assessing the impact of the green revolution, 1960–2000. Science 300:758–762

    PubMed  Article  CAS  Google Scholar 

  10. Felsenstein J (1993) phylip—Phylopgeny Inference Package, version 3.5c. Department of Genetics, University of Washington, Seattle

  11. Frankel OH (1970) Genetic dangers in the green revolution. World Agric 19:9–14

    Google Scholar 

  12. Frisch M, Bohn M, Melchinger AE (2000) plabsim: software for simulation of marker-assisted backcrossing. J Hered 91:86–87

    PubMed  Article  CAS  Google Scholar 

  13. Harlan JR (1972) Genetics of disaster. J Environ Qual 1:212–215

    Article  Google Scholar 

  14. Ihaka R, Gentleman R (1996) A language for data analysis and graphics. J Comput Graph Stat 5:299–314

    Google Scholar 

  15. Kihara H (1944) Discovery of the DD-analyser, one of the ancestors of vulgare wheats (In Japanese). Agric Hortic 19:13–14

    Google Scholar 

  16. Kimber G, Feldman M (2001) Wild wheat. An introduction. Special Report 353, College of Agriculture, University of Missouri, Colombia, pp 129–131

  17. Lelley T, Stachel M, Grausgruber H, Vollmann J (2000) Analysis of relationships between Aegilops tauschii and the D genome of wheat utilizing microsatellites. Genome 43:661–668

    PubMed  CAS  Google Scholar 

  18. Lubbers EL, Gill KS, Cox TS, Gill BS (1991) Variation of molecular markers among geographically diverse accessions of Triticum tauschii. Genome 34:354–361

    Article  Google Scholar 

  19. Lynch M, Walsh B (1997) Genetics and analysis of quantitative traits. Sinauer Assoc, Sunderland

    Google Scholar 

  20. Malecot G (1948) Les mathématiques de l’hérédite. Masson et Cie, Paris

  21. McFadden ES, Sears ER (1946) The origin of Triticum spelta and its free-threshing hexaploid relatives. J Hered 37:81–89

    PubMed  Google Scholar 

  22. Melchinger AE, Messmer MM, Lee M, Woodman WL, Lamkey KR (1991) Diversity and relationships among U.S. maize inbreds revealed by restriction fragment length polymorphisms. Crop Sci 31:669–678

    Article  Google Scholar 

  23. Nei M (1987) Molecular evolutionary genetics. Columbia University Press, New York

    Google Scholar 

  24. Rajaram S (1994) Wheat breeding at CIMMYT: commemorating 50 years of research in Mexico for global wheat improvement. Wheat Special Report No 29. CIMMYT, Mexico D.F.

    Google Scholar 

  25. Rajaram S, van Ginkel M (2001) Mexico: 50 years of international wheat breeding. In: Bonjean AP, Angus WJ (eds) The world wheat book. A history of wheat breading. Lavoisier, Paris, pp 579–610

    Google Scholar 

  26. Reeves T, Rajaram S, van Ginkel M, Trethowan R, Braun H, Cassaday K (1999) New wheats for a secure, sustainable future. CIMMYT, Mexico D.F.

  27. Reif JC, Xia XC, Melchinger AE, Warburton ML, Hoisington D, Beck D, Bohn M, Frisch M (2004) Genetic diversity determined within and among CIMMYT maize populations of tropical, subtropical, and temperate germplasm by SSR markers. Crop Sci 44:326–334

    Article  CAS  Google Scholar 

  28. Rogers JS (1972) Studies in genetics VII. University of Texas Publ, Austin

    Google Scholar 

  29. Roussel V, Koenig J, Beckert M, Balfourier F (2004) Molecular diversity in French bread wheat accessions related to temporal trends and breeding programmes. Theor Appl Genet 108:920–930

    PubMed  Article  CAS  Google Scholar 

  30. Salamini F, Özkan H, Brandolini A, Schäfer-Pregl R, Martin W (2002) Genetics and geography of wild cereal domestication in the Near East. Nat Rev Genet 3:429–441

    PubMed  CAS  Google Scholar 

  31. Sayre KD, Rajaram S, Fischer RA (1997) Yield potential progress in short bread wheats in northwest Mexico. Crop Sci 37:36–42

    Article  Google Scholar 

  32. Smale M, Reynolds MP, Warburton M, Skovmand B, Trethowan R, Singh RP, Ortiz-Monasterio I, Crossa J (2002) Dimensions of diversity in modern spring bread wheat in developing countries from 1965. Crop Sci 42:1766–1779

    Article  Google Scholar 

  33. Snedecor GW, Cochran WG (1980) Statistical methods. Iowa State University Press, Ames

    Google Scholar 

  34. St Martin SK (1982) Effective population size for the soybean improvement program in maturity groups 00 to IV. Crop Sci 22:151–152

    Article  Google Scholar 

  35. Talbert LE, Smith LY, Blake MK (1998) More than one origin of hexaploid wheat is indicated by sequence comparison of low-copy DNA. Genome 41:402–407

    Article  CAS  Google Scholar 

  36. Tanksley SD, McCouch R (1997) Seed banks and molecular maps: unlocking genetic potential from the wild. Science 277:1063–1066

    PubMed  Article  CAS  Google Scholar 

  37. Vigouroux Y, McMullen M, Hittinger CT, Houchins K, Schulz L, Kresovich S, Matsuoka Y, Doebley J (2002) Iden.gifying genes of agronomic importance in maize by screening microsatellites for evidence of selection during domestication. Proc Natl Acad Sci USA 99:9650–9655

    PubMed  Article  CAS  Google Scholar 

  38. Villareal RL, Davila GF, Kazi AM (1995) Synthetic hexaploids × Triticum aestivum advanced derivatives resistant to karnal bunt (Tilletia indica Mitra). Cereal Res Commun 23:127–132

    Google Scholar 

  39. Zhang P, Dreisigacker S, Melchinger AE, van Ginkel M, Hoisington D, Warburton ML (2005) Quan.gifying novel sequence variation and selective advantage in synthetic hexaploid wheats and their backcross-derived lines using SSR markers. Mol Breed (in press)

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Acknowledgements

We thank Bent Skovmand for providing the wheat material for this study. We are also indebted to the Vater & Sohn Eiselen-S.giftung, Ulm, and the German Federal Ministry of Economic Co-operation and Development, for their grateful financial support and collaboration within the project “Efficient management of genetic diversity in wheat: DNA marker for use in wheat breeding programs and gene banks”. We dedicate this article to Dr. Norman Borlaug, the father of the “Green Revolution”.

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Correspondence to A. E. Melchinger.

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Communicated by H.C. Becker

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Reif, J.C., Zhang, P., Dreisigacker, S. et al. Wheat genetic diversity trends during domestication and breeding. Theor Appl Genet 110, 859–864 (2005). https://doi.org/10.1007/s00122-004-1881-8

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Keywords

  • Simple Sequence Repeat Marker
  • Wheat Breeding
  • Karnal Bunt
  • Spring Bread Wheat
  • International Breeding