Comparison of different nuclear DNA markers for estimating intraspecific genetic diversity in plants

Molecular Ecology - Tập 13 Số 5 - Trang 1143-1155 - 2004
Hilde Nybom1
1Balsgård Department of Crop Science, Swedish University of Agricultural Sciences, Fjälkestadsvägen 459, SE-291 94 Kristianstad, Sweden

Tóm tắt

AbstractA compilation was made of 307 studies using nuclear DNA markers for evaluating among‐ and within‐population diversity in wild angiosperms and gymnosperms. Estimates derived by the dominantly inherited markers (RAPD, AFLP, ISSR) are very similar and may be directly comparable. STMS analysis yields almost three times higher values for within‐population diversity whereas among‐population diversity estimates are similar to those derived by the dominantly inherited markers. Number of sampled plants per population and number of scored microsatellite DNA alleles are correlated with some of the population genetics parameters. In addition, maximum geographical distance between sampled populations has a strong positive effect on among‐population diversity. As previously verified with allozyme data, RAPD‐ and STMS‐based analyses show that long‐lived, outcrossing, late successional taxa retain most of their genetic variability within populations. By contrast, annual, selfing and/or early successional taxa allocate most of the genetic variability among populations. Estimates for among‐ and within‐population diversity, respectively, were negatively correlated. The only major discrepancy between allozymes and STMS on the one hand, and RAPD on the other hand, concerns geographical range; within‐population diversity was strongly affected when the former methods were used but not so in the RAPD‐based studies. Direct comparisons between the different methods, when applied to the same plant material, indicate large similarities between the dominant markers and somewhat lower similarity with the STMS‐based data, presumably due to insufficient number of analysed microsatellite DNA loci in many studies.

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Molecular Ecology

Tập 13 Số 5

1143-1155

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