Large scale trials using normal pressure, high pressure, or high pressure plus aged eggs for transgenic coho salmon, give triploidy frequencies of only 99.8 %, 97.6 %, and 97.0 %, respectively.
12.
Triploidy ( having three sets of chromosomes ), tetraploidy ( four sets of chromosomes ) and pentaploidy ( five sets of chromosomes ) are common in Salamanders . " Ambystoma nothagenes " is a unisexual, triploid hybrid of " Ambystoma laterale ", " Ambystoma texanum " and " Ambystoma tigrinum ", while hybrids of " Ambystoma platineum " and " Ambystoma texanum " have been found to be tetraploid.
