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Tag: Salamander

Salamander genome provides clues to the amphibian's regenerative abilities

Salamander genome provides clues to the amphibian's regenerative abilities

Science
Dec. 22 (UPI) -- Scientists have for the first time sequenced the entire genome of the Iberian ribbed newt. Their efforts revealed a unique family of genes important to the salamander's impressive regenerative abilities.The Iberian ribbed newt, Pleurodeles waltl, maxes out at a foot in length, but the amphibian boasts a massive genome -- six times larger than the human genome.The sequencing of the giant genome by scientists at the Karolinska Institutet in Sweden revealed numerous copies of a microRNA group typically found in mammalian stem cells and tumor cells. Researchers believe this unique group is key to the salamander's ability to regenerate brain neurons and other parts of its body."It will be exciting to figure out how regeneration in the adult organism re-activates embryonic genes...
Salamander found to reproduce using the sperm of at least three males

Salamander found to reproduce using the sperm of at least three males

Science
June 12 (UPI) -- Why pass along the genes of a single mate when you can impart one's offspring with DNA from three fathers? Such is the unique reproductive strategy used by hybrid all-female populations of ambystomatid salamanders.When biologists from the University of Iowa sequenced the genome of all-female, or unisexual, salamanders, they found equal portions of DNA from three different species, Ambystoma laterale, Ambystoma texanum and Ambystoma tigrinum."We're hypothesizing the successful individuals have balanced gene expression," Maurine Neiman, a professor of biology at Iowa, said in a news release. "This balance might have been a prerequisite for the emergence and continued success of this particular hybrid lineage."Researchers believe all-female salamanders employ a reproductive t...