Sex-Linked Inheritance of thelfLocus in the Medaka Fish (Oryzias latipes)
- 1 January 1998
- journal article
- Published by Zoological Society of Japan in Zoological Science
- Vol. 15 (1) , 123-126
- https://doi.org/10.2108/zsj.15.123
Abstract
The lf (leucophore free) locus was previously reported autosomal recessive in the medaka fish (Oryzias latipes). However, extensive linkage analyses in this study using various strains revealed that the lf locus was closely sex-linked. The recombination frequency between lf and the male determining factor (y) was 2.2% (10 recombinants out of 464 progeny). Because the lf/lf homozygous fish do not have visible leucophores, they are distinguishable from wild type in early developmental stages. In the Qurt strain with heterozygous sex chromosomes (X(lf)/X(lf) in females and X(lf)/Y(+) in males), we can predict sex of each embryo on second day after fertilization. The strain should be a very useful material for studying sex determination or differentiation mechanisms in the medaka fish.Keywords
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