This chapter begins by reflecting upon the major theme of this book: that genetic exchange is pervasive across all biological lineages. It discusses the implications of this regarding the tree-of-life and web-of-life concepts. Research directions that will benefit our understanding of the role of genetic exchange in evolution are also discussed. Some of these, including the use of genomic information to discern web processes, are gaining momentum with the appearance of many new data-sets. Others, such as studies that investigate the role of ecological setting on the outcome of genetic exchange, are rare, yet they represent another Golden Fleece because of their potential to yield new insights of major importance.
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