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Wheat genetic diversity trends during domestication and breeding.
Theor Appl Genet. 2005 Mar; 110(5):859-64.TA

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.

Authors+Show Affiliations

Reif JC
Institute of Plant Breeding, Seed Science, and Population Genetics, University of Hohenheim, 70593, Stuttgart, Germany.
Zhang P
No affiliation info available
Dreisigacker S
No affiliation info available
Warburton ML
No affiliation info available
van Ginkel M
No affiliation info available
Hoisington D
No affiliation info available
Bohn M
No affiliation info available
Melchinger AE
No affiliation info available

MeSH

BreedingCluster AnalysisDNA FingerprintingGene FrequencyGenetic MarkersGenetic VariationGenotypePhylogenySpecies SpecificityTriticum

Pub Type(s)

Comparative Study
Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

15690175

Citation

Reif, J C., et al. "Wheat Genetic Diversity Trends During Domestication and Breeding." TAG. Theoretical and Applied Genetics. Theoretische Und Angewandte Genetik, vol. 110, no. 5, 2005, pp. 859-64.
Reif JC, Zhang P, Dreisigacker S, et al. Wheat genetic diversity trends during domestication and breeding. Theor Appl Genet. 2005;110(5):859-64.
Reif, J. C., Zhang, P., Dreisigacker, S., Warburton, M. L., van Ginkel, M., Hoisington, D., Bohn, M., & Melchinger, A. E. (2005). Wheat genetic diversity trends during domestication and breeding. TAG. Theoretical and Applied Genetics. Theoretische Und Angewandte Genetik, 110(5), 859-64.
Reif JC, et al. Wheat Genetic Diversity Trends During Domestication and Breeding. Theor Appl Genet. 2005;110(5):859-64. PubMed PMID: 15690175.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Wheat genetic diversity trends during domestication and breeding. AU - Reif,J C, AU - Zhang,P, AU - Dreisigacker,S, AU - Warburton,M L, AU - van Ginkel,M, AU - Hoisington,D, AU - Bohn,M, AU - Melchinger,A E, Y1 - 2005/02/03/ PY - 2004/10/25/received PY - 2004/11/04/accepted PY - 2005/2/4/pubmed PY - 2005/5/18/medline PY - 2005/2/4/entrez SP - 859 EP - 64 JF - TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik JO - Theor Appl Genet VL - 110 IS - 5 N2 - 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. SN - 0040-5752 UR - https://www.unboundmedicine.com/medline/citation/15690175/Wheat_genetic_diversity_trends_during_domestication_and_breeding_ DB - PRIME DP - Unbound Medicine ER -