Science online, take the stairs edition

Science online, take the stairs edition

 

Bang Rak Fire Station
Photo by Minette Layne.


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Science online, cracks of doom edition

Science online, cracks of doom edition

bees on Asclepias, enhanced a bit

Photo by Martin LaBar.


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Nothing in Biology Makes Sense: Making sense of pollination syndromes

Nothing in Biology Makes Sense: Making sense of pollination syndromes

 

2010.07.15 - Eastern Tiger Swallowtail
Pollinator at work. Photo by jby.

Over at Nothing in Biology Makes Sense! I’m discussing pollination syndromes—suites of traits held in common by plants that use similar pollinators.

  • Bee-pollinated flowers are usually blue or yellow, often with contrasting “guides” that point towards nectar rewards, and they usually have some sort of scent.
  • Bird-pollinated flowers tend to be red and tubular, and often open downwards. They produce lots of relatively weak nectar, and generally don’t have very strong scents …
  • Moth-pollinated flowers are usually white, opening in the evenings, and strongly scented.

To find out how evolution makes sense of these handy rules of natural historical thumb, go read the whole thing, and check out the new meta-analysis of pollination syndromes that I discuss.◼
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Proposed new consumer information labels for food products

Proposed new consumer information labels for food products

 

Energy in Bananas
Photo by Robert Fornal.

Produced with genetic engineering.

Contents derived from organisms produced by millennia of only occasionally deliberate selective breeding, and which may be so freakishly modified from their ancestral state that they would not survive five days without constant care and attention.

Product may make your tongue appear to be purple in color, but this effect is not permanent.

Read more …
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Science online, cologne and Faraday cages edition

Science online, cologne and Faraday cages edition

Follow the Leader

Photo by Bo Insogna.


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Nothing in Biology Makes Sense: Chipmunks have no respect for species boundaries

Nothing in Biology Makes Sense: Chipmunks have no respect for species boundaries

A yellow pine chipmunk, Tamias amoenus. Photo by Noah Reid, via Nothing in Biology Makes Sense.

At Nothing in Biology Makes Sens, Sarah Hird explains some of her own research, recently published at the journal Heredity, which documented just how “leaky” species boundaries can be in the chipmunks of western North America.

While doing a comparative phylogeography study, the Sullivan lab discovered that one particular subspecies, T. a. canicaudus, had a mitochondrial genome that was most closely related to the red-tailed chipmunk (T. ruficaudus), instead of the other yellow-pine subspecies. Additional data show that the T. a. canicaudus nuclear genome is in fact most similar to other yellow-pines – it’s just that the mitochondria is of red-tailed origin.

For all the sordid phylogenetic details, go read the whole post, and check out the original paper.◼
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The Molecular Ecologist: More functions, stronger selection?

The Molecular Ecologist: More functions, stronger selection?

Victorinox Swiss Army Knife

Photo by James Case.

Over at The Molecular Ecologist I’m discussing a new paper in the journal Genetics, which demonstrates that selection acts more strongly on genes that affect multiple traits:

Genes that have roles in multiple traits—pleiotropic genes—have long been thought to be under stronger selection as a result of those multiple functions. The basic logic is that, when a gene produces a protein that has a lot of different functional roles, there are more functions that will be disrupted by changes to that protein. Which would be more inconvenient: if your smartphone suddenly needed a new type of power connector, or if every electrical outlet in your house suddenly accepted only plugs with four prongs?

A team at the University of Queensland tested this idea using a lot of fruit flies and some cleverly applied gene expression resources. To find out how it all worked, go read the whole post, and check out the original paper.◼
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Science online, robot chicken-roost edition

Science online, robot chicken-roost edition

Chicken
Photo by Karen Jackson.


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Science online, cat fancy edition

Science online, cat fancy edition

The white cat

What’s going on in there? Photo by Enrico .


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The Molecular Ecologist: Scanning the genome for local adaptation

The Molecular Ecologist: Scanning the genome for local adaptation

The collection locations for plant lines sampled in my analysis. Figure 1 from Yoder et al. (2014).

This week at The Molecular Ecologist, I’ve just posted a new discussion of the latest publication to come out of my postdoctoral research with the Medicago HapMap Project. It’s an attempt to find genome regions that might be important for adaptation to climate, by scanning through a whole lot of genetic data from plants collected in different climates.

This is what’s known as a “reverse ecology” approach—it skips over the process of identifying specific traits that are important for surviving changing climates, and instead uses population genetic patterns to infer what’s going on. One approach for such a scan is presented in my latest paper, which is in this month’s issue of Genetics. Essentially I think of this as what you can do, given a lot of genetic data for a geographically distributed sample—in this case for barrel medick, or Medicago truncatula. Medicago truncatula is a model legume species, which has been used in a great deal of laboratory and greenhouse experimentation—but in this project, I tried to treat M. truncatula as a “field model” organism.

For a run-down of what I did, and what I found, go read the whole post—or check out the paper itself [PDF].◼
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