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. 1977 May 20;196(4292):900-2.
doi: 10.1126/science.860122.

Heteromorphic sex chromosomes in male rainbow trout

G H Thorgaard

Heteromorphic sex chromosomes in male rainbow trout

G H Thorgaard. Science. .

Abstract

A pair of subtelocentric chromosomes differs in the size of the short arm in male, but not female, rainbow trout (Salmo gairdneri). The morphological similarity of the X and Y chromosomes, and the observation of Y chromosomes intermediate between the X and normal Y, suggest that the sex chromosomes are at an early stage of differentiation in this species.

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