Whole Genome Sequencing-Based Mapping and Candidate Identification of Mutations from Fixed Zebrafish Tissue
As forward genetic screens in zebrafish become more common, the number of mutants that cannot be identified by gross morphology or through transgenic approaches, such as many nervous system defects, has also increased. Screening for these difficult-to-visualize phenotypes demands techniques such as...
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Published in | G3 : genes - genomes - genetics Vol. 7; no. 10; pp. 3415 - 3425 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
Genetics Society of America
01.10.2017
Oxford University Press |
Subjects | |
Online Access | Get full text |
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Summary: | As forward genetic screens in zebrafish become more common, the number of mutants that cannot be identified by gross morphology or through transgenic approaches, such as many nervous system defects, has also increased. Screening for these difficult-to-visualize phenotypes demands techniques such as whole-mount
hybridization (WISH) or antibody staining, which require tissue fixation. To date, fixed tissue has not been amenable for generating libraries for whole genome sequencing (WGS). Here, we describe a method for using genomic DNA from fixed tissue and a bioinformatics suite for WGS-based mapping of zebrafish mutants. We tested our protocol using two known zebrafish mutant alleles,
and
, both of which cause myelin defects. As further proof of concept we mapped a novel mutation,
, identified in a zebrafish WISH screen for myelination defects. We linked
to chromosome 1 and identified a candidate nonsense mutation in the
(
) gene. Importantly,
mutants phenocopy previously described
mutants, and knockdown of
in wild-type animals produced similar defects, demonstrating that
disrupts
Together, these data show that our mapping protocol can map and identify causative lesions in mutant screens that require tissue fixation for phenotypic analysis. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 Present address: Institute of Neuroscience, University of Oregon, Eugene, OR 97403. These authors contributed equally to this work. Present address: Department of Pediatrics, Dell Medical School, University of Texas at Austin, Austin, TX 78723. Present address: The Vollum Institute Oregon Health and Science University L474 3181 SW Sam Jackson Park Road Portland, OR 97239-3098. |
ISSN: | 2160-1836 2160-1836 |
DOI: | 10.1534/g3.117.300212 |