Genetic diversity in cultivated plants--loss or stability?

Human activities like urbanisation, the replacement of traditional agriculture systems by modern industrial methods or the introduction of modern high-yielding varieties may pose a danger to the biological diversity. Using microsatellite markers, we analysed samples of cultivated wheat (Triticum aes...

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Bibliographic Details
Published in:Theoretical and applied genetics 2004-05, Vol.108 (8), p.1466-1472
Main Authors: Khlestkina, E.K, Huang, X.Q, Quenum, F.J.B, Chebotar, S, Roder, M.S, Borner, A
Format: Article
Language:English
Subjects:
Agricultural research
Agriculture - trends
Albania
Alleles
alleles per locus
Allelomorphism
Asia
Austria
Biodiversity
Biological and medical sciences
Biological diversity
Classical genetics, quantitative genetics, hybrids
collection mission-shared alleles
collection mission-specific alleles
Cultivars
Distribution
Evolution, Molecular
Fundamental and applied biological sciences. Psychology
gene flow
Genetic aspects
Genetic diversity
genetic variation
Genetic Variation - genetics
Genetics of eukaryotes. Biological and molecular evolution
geographical variation
germplasm
India
intensive farming
loci
longitudinal studies
microsatellite repeats
Microsatellite Repeats - genetics
Nepal
plant exploration and collection
plant genetic resources
polymorphic information content
Production processes
Pteridophyta, spermatophyta
temporal variation
Time Factors
traditional farming
Triticum - genetics
Triticum aestivum
Urbanization
Vegetals
Wheat
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Summary:Human activities like urbanisation, the replacement of traditional agriculture systems by modern industrial methods or the introduction of modern high-yielding varieties may pose a danger to the biological diversity. Using microsatellite markers, we analysed samples of cultivated wheat (Triticum aestivum L.) collected over an interval of 40-50 years in four comparable geographical regions of Europe and Asia. No significant differences in both the total number of alleles per locus and in the PIC values were detected when the material collected in the repeated collection missions in all four regions were compared. About two-thirds of the alleles were common to both collection periods, while one-third represented collection mission-specific alleles. These findings demonstrate that an allele flow took place during the adaptation of traditional agriculture to modern systems, whereas the level of genetic diversity was not significantly influenced.
ISSN:0040-5752
1432-2242
DOI:10.1007/s00122-003-1572-x