Genetic improvement of rainbow trout in Iran

Inthisstudy, Iranian and French male and femaleOncorhynchus mykiss broodstocks were invided into two groups 50 and 24 respectivelyin Research center of genetic and breeding of coldwater fishers, Yasouj,Iran and the genetic structure of them was investigated using 6 microsatellite markers. Along withbroodstockmaturation, fertilization 1:1(female:male) were randomly assigned and occurred in25 of12Iranian andFrenchtreatment respectively.Reproductiveparameterswere recordedfor the whole family.Average number of observed alleles in Iranian and French stocks was 6.68 and 6.83, respectively.Average number of effective alleles in Iranian and French stocks was 3.13 and 3.45 respectively.Fixation index Fstwas calculated based on allelic frequency between two stocks was 0.058 with significant difference between 2 stocks. Eyed percentage for french broodstock calaulated zero and deleted.Fertilization rate(100-0), the eyed percentage (98-0), The hatch rate(98- 0),the averagefecundity4114.708, the average eggs size 4.88 mm,Survivalinthe first three months 19-73% calculated for Iranian broodstocks.Considering thequality ofeggs and larvaeat different stagesandselectionbetween the differentfamilyandthe within family remained 10 treatments and are keptasfuturebroodstocks.Therelationship betweenfecundity-egg size, fecundity-weight,fecundity-length,egg sizeweightwas performedusingregression.The resultsshowed thatFecundity wasinfluenced more byweightandproductivelength.The research isbeginning toIDthebroodstockin our country.

Iranian Fisheries Science Research Institute

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