Abstract
The hybrids are obtained by the routine artificial fertilization between a single female rainbow trout Salmo gairdneri and a male brook trout Salvelinus fontinalis. The chromosome spreads from the culture cells of eyed-embryos and fins of the parents and the hybrids. Two eyed-embryos have 72 chromosomes and eight eyed-embryos and fifteen fingerlings have 102 chromosomes, respectively. The individuals with 72 chromosomes (31 M and SM, 3 ST, 38 A) have a intermediate karyotype between the parents. The individuals with 102 chromosomes (53 M and SM, 4 ST, 45 A) are triploid having two genomes of rainbow trout and one genome of brook trout.
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