How many marker loci are necessary? Analysis of dominant marker data sets using two popular population genetic algorithms

Ecology and Evolution

Michael F. Nelson¹ 

[1] Department of Horticultural Science, University of Minnesota, Saint Paul, Minnesota

关键词: AFLPs;    AMOVA;    Invasive species;    ISSRs;    Phalaris arundinacea;    sample size;    STRUCTURE;   

DOI  :  10.1002/ece3.725

来源: Wiley

【 摘 要 】

Abstract

The number of marker loci required to answer a given research question satisfactorily is especially important for dominant markers since they have a lower information content than co-dominant marker systems. In this study, we used simulated dominant marker data sets to determine the number of dominant marker loci needed to obtain satisfactory results from two popular population genetic analyses: STRUCTURE and AMOVA (analysis of molecular variance). Factors such as migration, level of population differentiation, and unequal sampling were varied in the data sets to mirror a range of realistic research scenarios. AMOVA performed well under all scenarios with a modest quantity of markers while STRUCTURE required a greater number, especially when populations were closely related. The popular ΔK method of determining the number of genetically distinct groups worked well when sampling was balanced, but underestimated the true number of groups with unbalanced sampling. These results provide a window through which to interpret previous work with dominant markers and we provide a protocol for determining the number of markers needed for future dominant marker studies.

【 授权许可】

CC BY   
© 2013 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.

Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.