Author Archives: Stacy Krueger-Hadfield

Not everyone likes it hot … winter or not

Posted on 26 Dec, 2014 by Stacy Krueger-Hadfield

On this Boxing Day, many of us may be bracing against winter storms.  For those of us in the Northern Hemisphere, we might all be dreaming of summer weather (including those of us who think a Southern Californian version of winter downright … Continue reading →

Posted in adaptation, natural history | Leave a comment

haploidy, diploidy, polyploidy … not a problem

Posted on 19 Dec, 2014 by Stacy Krueger-Hadfield

Investigating pairwise relatedness is fundamental to the characterization of the mating system and inferring genetic structure. If no pedigree exists, then relatedness is estimated from genetic markers (e.g., microsatellite loci) using method-of-moment or maximum-likelihood methods. However, not all individuals in … Continue reading →

Posted in natural history, pedigree, population genetics, software, Uncategorized | Leave a comment

Totally RAD

Posted on 12 Dec, 2014 by Stacy Krueger-Hadfield

Puritz et al. (2014) weigh the pros and cons of, the aptly titled, “RAD fad” in a comment recently published online in Molecular Ecology. They challenge: (1) the assertion that the original RAD protocol minimizes the impact of PCR artifacts … Continue reading →

Posted in bioinformatics, genomics, methods, next generation sequencing, Uncategorized | 4 Comments

Exotic gene flow surveillance

Posted on 5 Dec, 2014 by Stacy Krueger-Hadfield

Exotic forest plantations often cover large areas and, as such, may contribute female gametes, male gametes and/or zygotes to native stands. In seed plants, these three components of exotic gene flow have not been distinguished, though they will have different … Continue reading →

Posted in conservation, Molecular Ecology, the journal, population genetics, Uncategorized | Leave a comment

Caught sweeping 'cross the sea

Posted on 28 Nov, 2014 by Stacy Krueger-Hadfield

  The salmon louse Lepeophtheirus salmonis is an ectoparasite linked to declines in wild salmonid populations as well as causing huge economic losses in salmon farms. Previous studies, using a variety of molecular markers, yielded conflicting results ranging from strong … Continue reading →

Posted in adaptation, genomics, mutation, next generation sequencing | Leave a comment

The latest gadget for the molecular ecologist’s toolkit

Posted on 21 Nov, 2014 by Stacy Krueger-Hadfield

Designing a sampling scheme to collect an organism of interest for a population genetic/genomic study can be fraught with difficulty. How best to sample? Randomly? Or, along a grid? How many individuals to sample? Thirty? Or, perhaps, the sample size … Continue reading →

Posted in genomics, methods, Molecular Ecology, the journal, natural history, pedigree, population genetics, software | 2 Comments

The forest resounding at rare intervals with the note of … reproductive isolation

Posted on 14 Nov, 2014 by Stacy Krueger-Hadfield

Hybrid zones are often used as a window with which to gaze upon the evolutionary process (Barton and Hewitt 1989). With the advent of genomic tools, it is possible to detect the genomic signatures and the architecture underlying reproductive isolation. In … Continue reading →

Posted in adaptation, conservation, genomics, next generation sequencing, population genetics, speciation | 1 Comment

Happy as a clam, despite genetic uniformity

Posted on 7 Nov, 2014 by Stacy Krueger-Hadfield

  Introduced populations of non-native species are often associated with low genetic diversity, as measured by neutral genetic loci, and, thus, considered a paradox (but see Roman and Darling 2007). The study by Lise-Marie Pigneur and colleagues documents an extreme example … Continue reading →

Posted in natural history, population genetics | Leave a comment