Chromosome-level genome sequence of the Genetically Improved Farmed Tilapia (GIFT, Oreochromis niloticus) highlights regions of introgression with O. mossambicus

Abstract Background The Nile tilapia (Oreochromis niloticus) is the third most important freshwater fish for aquaculture. Its success is directly linked to continuous breeding efforts focusing on production traits such as growth rate and weight. Among those elite strains, the Genetically Improved Fa...

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Main Authors: G. J. Etherington, W. Nash, A. Ciezarek, T. K. Mehta, A. Barria, C. Peñaloza, M. G. Q. Khan, A. Durrant, N. Forrester, F. Fraser, N. Irish, G. G. Kaithakottil, J. Lipscombe, T. Trong, C. Watkins, D. Swarbreck, E. Angiolini, A. Cnaani, K. Gharbi, R. D. Houston, J. A. H. Benzie, W. Haerty
Format: Article
Language:English
Published: BMC 2022-12-01
Series:BMC Genomics
Subjects:
Online Access:https://doi.org/10.1186/s12864-022-09065-8
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author G. J. Etherington
W. Nash
A. Ciezarek
T. K. Mehta
A. Barria
C. Peñaloza
M. G. Q. Khan
A. Durrant
N. Forrester
F. Fraser
N. Irish
G. G. Kaithakottil
J. Lipscombe
T. Trong
C. Watkins
D. Swarbreck
E. Angiolini
A. Cnaani
K. Gharbi
R. D. Houston
J. A. H. Benzie
W. Haerty
author_facet G. J. Etherington
W. Nash
A. Ciezarek
T. K. Mehta
A. Barria
C. Peñaloza
M. G. Q. Khan
A. Durrant
N. Forrester
F. Fraser
N. Irish
G. G. Kaithakottil
J. Lipscombe
T. Trong
C. Watkins
D. Swarbreck
E. Angiolini
A. Cnaani
K. Gharbi
R. D. Houston
J. A. H. Benzie
W. Haerty
author_sort G. J. Etherington
collection DOAJ
description Abstract Background The Nile tilapia (Oreochromis niloticus) is the third most important freshwater fish for aquaculture. Its success is directly linked to continuous breeding efforts focusing on production traits such as growth rate and weight. Among those elite strains, the Genetically Improved Farmed Tilapia (GIFT) programme initiated by WorldFish is now distributed worldwide. To accelerate the development of the GIFT strain through genomic selection, a high-quality reference genome is necessary. Results Using a combination of short (10X Genomics) and long read (PacBio HiFi, PacBio CLR) sequencing and a genetic map for the GIFT strain, we generated a chromosome level genome assembly for the GIFT. Using genomes of two closely related species (O. mossambicus, O. aureus), we characterised the extent of introgression between these species and O. niloticus that has occurred during the breeding process. Over 11 Mb of O. mossambicus genomic material could be identified within the GIFT genome, including genes associated with immunity but also with traits of interest such as growth rate. Conclusion Because of the breeding history of elite strains, current reference genomes might not be the most suitable to support further studies into the GIFT strain. We generated a chromosome level assembly of the GIFT strain, characterising its mixed origins, and the potential contributions of introgressed regions to selected traits.
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spelling doaj.art-cb164b73212240a292a50ca50aa43b4b2022-12-22T04:23:38ZengBMCBMC Genomics1471-21642022-12-0123111610.1186/s12864-022-09065-8Chromosome-level genome sequence of the Genetically Improved Farmed Tilapia (GIFT, Oreochromis niloticus) highlights regions of introgression with O. mossambicusG. J. Etherington0W. Nash1A. Ciezarek2T. K. Mehta3A. Barria4C. Peñaloza5M. G. Q. Khan6A. Durrant7N. Forrester8F. Fraser9N. Irish10G. G. Kaithakottil11J. Lipscombe12T. Trong13C. Watkins14D. Swarbreck15E. Angiolini16A. Cnaani17K. Gharbi18R. D. Houston19J. A. H. Benzie20W. Haerty21Earlham Institute, Norwich Research ParkEarlham Institute, Norwich Research ParkEarlham Institute, Norwich Research ParkEarlham Institute, Norwich Research ParkThe Roslin Institute, The University of EdinburghThe Roslin Institute, The University of EdinburghThe Roslin Institute, The University of EdinburghEarlham Institute, Norwich Research ParkEarlham Institute, Norwich Research ParkEarlham Institute, Norwich Research ParkEarlham Institute, Norwich Research ParkEarlham Institute, Norwich Research ParkEarlham Institute, Norwich Research ParkWorldFishEarlham Institute, Norwich Research ParkEarlham Institute, Norwich Research ParkEarlham Institute, Norwich Research ParkDepartment of Poultry and Aquaculture, Institute of Animal Science, Agricultural Research Organization - Volcani InstituteEarlham Institute, Norwich Research ParkThe Roslin Institute, The University of EdinburghWorldFishEarlham Institute, Norwich Research ParkAbstract Background The Nile tilapia (Oreochromis niloticus) is the third most important freshwater fish for aquaculture. Its success is directly linked to continuous breeding efforts focusing on production traits such as growth rate and weight. Among those elite strains, the Genetically Improved Farmed Tilapia (GIFT) programme initiated by WorldFish is now distributed worldwide. To accelerate the development of the GIFT strain through genomic selection, a high-quality reference genome is necessary. Results Using a combination of short (10X Genomics) and long read (PacBio HiFi, PacBio CLR) sequencing and a genetic map for the GIFT strain, we generated a chromosome level genome assembly for the GIFT. Using genomes of two closely related species (O. mossambicus, O. aureus), we characterised the extent of introgression between these species and O. niloticus that has occurred during the breeding process. Over 11 Mb of O. mossambicus genomic material could be identified within the GIFT genome, including genes associated with immunity but also with traits of interest such as growth rate. Conclusion Because of the breeding history of elite strains, current reference genomes might not be the most suitable to support further studies into the GIFT strain. We generated a chromosome level assembly of the GIFT strain, characterising its mixed origins, and the potential contributions of introgressed regions to selected traits.https://doi.org/10.1186/s12864-022-09065-8Reference genomeTilapiaIntrogressionAquaculture
spellingShingle G. J. Etherington
W. Nash
A. Ciezarek
T. K. Mehta
A. Barria
C. Peñaloza
M. G. Q. Khan
A. Durrant
N. Forrester
F. Fraser
N. Irish
G. G. Kaithakottil
J. Lipscombe
T. Trong
C. Watkins
D. Swarbreck
E. Angiolini
A. Cnaani
K. Gharbi
R. D. Houston
J. A. H. Benzie
W. Haerty
Chromosome-level genome sequence of the Genetically Improved Farmed Tilapia (GIFT, Oreochromis niloticus) highlights regions of introgression with O. mossambicus
BMC Genomics
Reference genome
Tilapia
Introgression
Aquaculture
title Chromosome-level genome sequence of the Genetically Improved Farmed Tilapia (GIFT, Oreochromis niloticus) highlights regions of introgression with O. mossambicus
title_full Chromosome-level genome sequence of the Genetically Improved Farmed Tilapia (GIFT, Oreochromis niloticus) highlights regions of introgression with O. mossambicus
title_fullStr Chromosome-level genome sequence of the Genetically Improved Farmed Tilapia (GIFT, Oreochromis niloticus) highlights regions of introgression with O. mossambicus
title_full_unstemmed Chromosome-level genome sequence of the Genetically Improved Farmed Tilapia (GIFT, Oreochromis niloticus) highlights regions of introgression with O. mossambicus
title_short Chromosome-level genome sequence of the Genetically Improved Farmed Tilapia (GIFT, Oreochromis niloticus) highlights regions of introgression with O. mossambicus
title_sort chromosome level genome sequence of the genetically improved farmed tilapia gift oreochromis niloticus highlights regions of introgression with o mossambicus
topic Reference genome
Tilapia
Introgression
Aquaculture
url https://doi.org/10.1186/s12864-022-09065-8
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