RSS 2.0 Feed

» Welcome Guest Log In :: Register

Pages: (59) < [1] 2 3 4 5 6 ... >   
  Topic: Science Break, Selected Shorts< Next Oldest | Next Newest >  
Timothy McDougald

Posts: 1030
Joined: Dec. 2006

(Permalink) Posted: Sep. 04 2008,22:29   

Natural Selection on a Major Armor Gene in Threespine Stickleback

Here is the abstract:

Experimental estimates of the effects of selection on genes determining adaptive traits add to our understanding of the mechanisms of evolution. We measured selection on genotypes of the Ectodysplasin locus, which underlie differences in lateral plates in threespine stickleback fish. A derived allele (low) causing reduced plate number has been fixed repeatedly after marine stickleback colonized freshwater from the sea, where the ancestral allele (complete) predominates. We transplanted marine sticklebacks carrying both alleles to freshwater ponds and tracked genotype frequencies over a generation. The low allele increased in frequency once lateral plates developed, most likely via a growth advantage. Opposing selection at the larval stage and changing dominance for fitness throughout life suggest either that the gene affects additional traits undergoing selection or that linked loci also are affecting fitness.

I have a copy, email me at if you would like one.

Church burning ebola boy

FTK: I Didn't answer your questions because it beats the hell out of me.

PaV: I suppose for me to be pried away from what I do to focus long and hard on that particular problem would take, quite honestly, hundreds of thousands of dollars to begin to pique my interest.

  1753 replies since July 16 2008,08:10 < Next Oldest | Next Newest >  

Pages: (59) < [1] 2 3 4 5 6 ... >   

Track this topic Email this topic Print this topic

[ Read the Board Rules ] | [Useful Links] | [Evolving Designs]