Practicable approaches to facilitate rapid and accurate molecular cytogenetic mapping in birds and mammals

Journal article


Morris, W., Stephenson, J., Robertson, L., Turner, K., Brown, H., Ioannou, D., Tempest, H., Skinner, B. and Griffin, D. 2007. Practicable approaches to facilitate rapid and accurate molecular cytogenetic mapping in birds and mammals. Cytogenetic and Genome Research. 117 (1-4), pp. 36-42. https://doi.org/10.1159/issn.1424-8581
AuthorsMorris, W., Stephenson, J., Robertson, L., Turner, K., Brown, H., Ioannou, D., Tempest, H., Skinner, B. and Griffin, D.
Abstract

Molecular cytogenetic mapping by FISH is a common feature of most genome projects as it provides a global, low-resolution overview of the genome and facilitates comparative genomics.
An essential prerequisite for cytogenetic mapping is the ability to identify accurately the chromosome on which the clone (e.g. BAC) resides.

This is not usually a barrier to human mapping as knowledge of the human karyotype is commonplace. For other species however accurate assignment can be problematic either because, as in birds, the karyotype is too complex to analyze by standard means or because of the paucity of individuals skilled to perform the karyotyping. Using chicken as a model we have developed a reproducible approach for accurate cytogenetic mapping that involves: a single colour FISH, measurement of the ratio of the size of the signal bearing chromosome to that of chromosome 8, and final assignment through a small series of dual colour experiments.
Reference values for size ratios were established using base pair estimate information from the Ensembl browser. By this method cytogenetic mapping to highly complex karyotypes can be achieved in a small number of simple steps.

We have also developed and tested a karyotyping tutorial programme adapted from one previously reported in this journal. That is, we have used pig as an example of a model species with a relatively tractable karyotype and demonstrated that scientists and students, even after only one hour using our tutorial, can readily identify pig chromosomes and thus make appropriate assignments using FISH. Simple, practicable means often provide preferable solutions than complex alternatives (e.g. m-FISH) to the solution of scientific problems.

Such is the case for the approaches described here.

Year2007
JournalCytogenetic and Genome Research
Journal citation117 (1-4), pp. 36-42
PublisherKarger
ISSN1424-8581
Digital Object Identifier (DOI)https://doi.org/10.1159/issn.1424-8581
Publication dates
PrintJul 2007
Publication process dates
Deposited29 Jun 2017
Output statusPublished
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https://repository.canterbury.ac.uk/item/88368/practicable-approaches-to-facilitate-rapid-and-accurate-molecular-cytogenetic-mapping-in-birds-and-mammals

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