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Cryopreservation is the science in which biological material is preserved at a very low temperature in such a way that germplasms are viable. The germplasm conservation ensures the availability of useful genetic material. Sperm and embryo cryopreservation are important technological tools for ex situ conservation. Sperm of several finfish species has been successfully cryopreserved by developing species-specific protocols. The development of species-specific protocol of cryopreservation is essential, because rapid variations in eco-physiological conditions of fishes have imparted...

Recent developments in DNA marker technologies have made it possible to uncover a large number of genetic polymorphisms at the DNA sequence level, and to use them as markers for evaluation of the genetic basis for the observed phenotypic variability. The molecular markers possess unique genetic properties and methodological advantages that make them more useful and amenable for genetic analysis compared to other genetic markers The commonly used techniques are allozyme analysis, RFLP, RAPD, AFLP, microsatellite typing, SNP and EST markers, etc. In present book, three DNA markers i.e....