カラフトマス雌とイワナ雄の異質3倍体雑種にみられた生存性の向上〔英文〕

概要

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Triploidization of hybrids between female pink salmon Oncorhynchus gorbuscha and male Japanese char Salvelinus leucomaenis was performed by treating fertilized eggs with hydrostatic pressure. The embryos were confirmed to be allotriploids comprising two sets of maternally derived genome and one set of paternally derived genome by observations of chromosomes and measurement of erythrocytes. No diploid hybrid developed beyond the eyed stage, while 62.5% of triploid hybrids reached the eyed stage and 26.1% hatched out. This evidence showed an increased viability of hybrids by artificial allotriploidization. From the present and previous results on viabilities of allotriploids, it is estimated that an influence of paternally derived genome has an essential role for ruling survival potentials of triploid hybrids.
日本水産學會の論文