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Chromosomal Localization and Heterochromatin Association of Ribosomal RNA Gene Loci and Silver-stained Nucleolar Organizer Regions in Salmonid Fishes
TLDR
Comparison of the assigned major rDNA loci and sequentially detected silver (Ag)-stained nucleolar organizer regions (AgNORs) in all the species revealed a considerable polymorphism in the number and size of AgNORs among or within those loci, suggesting a possible inter- or intralocus inactivation of the major rDNAs.
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Visualization of primordial germ cells in vivo using GFP-nos1 3'UTR mRNA.
TLDR
It is indicated that the 3'UTR of the zebrafish nos1 mRNA can promote maintenance of RNAs in the PGCs of different fish species, and the migration routes of P GCs in seven teleost species are described and compared.
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Xenogenesis in Teleost Fish Through Generation of Germ-Line Chimeras by Single Primordial Germ Cell Transplantation1
TLDR
The results show that xenogenesis is realistic and practical across species, genus, and family barriers and can be achieved by the transplantation of a single PGC from a donor species.
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Early Depletion of Primordial Germ Cells in Zebrafish Promotes Testis Formation
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Uniparental chromosome elimination in the early embryogenesis of the inviable salmonid hybrids between masu salmon female and rainbow trout male
TLDR
The present findings suggest that the paternal Rb chromosomes in the inviable hybrids are preferentially eliminated through mitotic abnormalities during early embryogenesis, owing to a possible incompatibility between the maternal Ms cytoplasm and paternal R b genome.
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A possible hybrid zone in the Mytilus edulis complex in Japan revealed by PCR markers
TLDR
Sequence analysis of the two fragments indicated that the 168 and 126 bp fragments are almost identical to previously reported sequences in M. trossulus and M. galloprovincialis, evident that mixing of genes occurred between the two species off Hokkaido.
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Developmental Stages and Germ Cell Lineage of the Loach (Misgurnus anguillicaudatus)
TLDR
Primordial germ cells of the loach derived from the cleavage furrows of 8-cell stage embryos began proliferation in the late blastula period and migrated to the gonadal anlagen through a migration pathway similar to that of the zebrafish.
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Genome size variation estimated by flow cytometry in Acipenser mikadoi, Huso dauricus in relation to other species of Acipenseriformes
Summary In Acipenseriformes, extant species can be categorized into three ploidy groups based on their genome size inferred from chromosome numbers and/or nuclear DNA content. However, genome size…
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The Origin And Migration Of Primordial Germ Cells In Sturgeons
TLDR
It is demonstrated that the migratory mechanism is well-conserved between sturgeon and other remotely related teleosts, such as goldfish, by a single PGCs transplantation (SPT) assay and evidence showing that P GCs are specified by inheritance of maternally supplied germplasm is provided.
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Localized maternal factors are required for zebrafish germ cell formation.
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