Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/34837
Appears in Collections:Aquaculture Journal Articles
Peer Review Status: Refereed
Title: Detection and characterization of small insertion and deletion genetic variants in modern layer chicken genomes
Author(s): Boschiero, Clarissa
Gheyas, Almas A
Ralph, Hannah K
Eory, Lel
Paton, Bob
Kuo, Richard
Fulton, Janet
Preisinger, Rudolf
Kaiser, Pete
Burt, David W
Contact Email: almas.gheyas@stir.ac.uk
Keywords: Dindel
SAMtools
False discovery rate
InDel
Layer chicken
Loss-of-function mutation
Next generation sequencing
Issue Date: Dec-2015
Date Deposited: 8-Feb-2023
Citation: Boschiero C, Gheyas AA, Ralph HK, Eory L, Paton B, Kuo R, Fulton J, Preisinger R, Kaiser P & Burt DW (2015) Detection and characterization of small insertion and deletion genetic variants in modern layer chicken genomes. <i>BMC Genomics</i>, 16, Art. No.: 562. https://doi.org/10.1186/s12864-015-1711-1
Abstract: Background Small insertions and deletions (InDels) constitute the second most abundant class of genetic variants and have been found to be associated with many traits and diseases. The present study reports on the detection and characterisation of about 883 K high quality InDels from the whole-genome analysis of several modern layer chicken lines from diverse breeds. Results To reduce the error rates seen in InDel detection, this study used the consensus set from two InDel-calling packages: SAMtools and Dindel, as well as stringent post-filtering criteria. By analysing sequence data from 163 chickens from 11 commercial and 5 experimental layer lines, this study detected about 883 K high quality consensus InDels with 93 % validation rate and an average density of 0.78 InDels/kb over the genome. Certain chromosomes, viz, GGAZ, 16, 22 and 25 showed very low densities of InDels whereas the highest rate was observed on GGA6. In spite of the higher recombination rates on microchromosomes, the InDel density on these chromosomes was generally lower relative to macrochromosomes possibly due to their higher gene density. About 43–87 % of the InDels were found to be fixed within each line. The majority of detected InDels (86 %) were 1–5 bases and about 63 % were non-repetitive in nature while the rest were tandem repeats of various motif types. Functional annotation identified 613 frameshift, 465 non-frameshift and 10 stop-gain/loss InDels. Apart from the frameshift and stopgain/loss InDels that are expected to affect the translation of protein sequences and their biological activity, 33 % of the non-frameshift were predicted as evolutionary intolerant with potential impact on protein functions. Moreover, about 2.5 % of the InDels coincided with the most-conserved elements previously mapped on the chicken genome and are likely to define functional elements. InDels potentially affecting protein function were found to be enriched for certain gene-classes e.g. those associated with cell proliferation, chromosome and Golgi organization, spermatogenesis, and muscle contraction. Conclusions The large catalogue of InDels presented in this study along with their associated information such as functional annotation, estimated allele frequency, etc. are expected to serve as a rich resource for application in future research and breeding in the chicken.
DOI Link: 10.1186/s12864-015-1711-1
Rights: This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
Licence URL(s): http://creativecommons.org/licenses/by/4.0/

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