Jump to content
Sign in to follow this  
Soothing Shrimp

Different Phenotypes of Marmorkrebs

Recommended Posts

Here's an interesting article dealing with Marble crays on Production of different phenotypes from the same genotype in the same environment by developmental variation.

 

http://jeb.biologists.org/content/211/4/510.full

Share this post


Link to post
Share on other sites

Great find. The keyword is epigenetics. The gene activity is influenced by epigenetic regulation such as DNA methylation and histone modification (acetylation, methylation, etc.). It is harder to study than the primary DNA sequence but for the variations in the phenotype likely as important as variations caused by mutations. Epigenetics should be taken into account by breeders, because the epigenetic marks can change during the lifetime of an organism or in its offspring and are often influenced by the environment, such as food, substrates and water chemistry.

It is one explanation why some interesting variations in phenotypes are sometimes not heritable or disappear or weaken if we put shrimps from one tank into another, or from move them from one breeder to another.

Share this post


Link to post
Share on other sites

So that is why my batch ranges from half an inch to two inches ... I think they are all from the same clutch of eggs, and I was worried that I was underfeeding them since there was such a big size variation.

Share this post


Link to post
Share on other sites

Yes, the (genetically identical) self cloning caryfish are an excellent system to study this variation.

I read some articles a while ago about coat color variation in genetically identical mice that was caused by epigenetic mechanisms.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
Sign in to follow this  

×
×
  • Create New...