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QTL for IHNV resistance and growth identified in a rainbow (Oncorhynchus mykiss) × Yellowstone cutthroat (Oncorhynchus clarki bouvieri) trout cross
Year:
2008
Source of publication :
aquaculture (source)
Authors :
Barroso, Renata Melon
;
.
Volume :
277
Co-Authors:
Barroso, R.M., School of Biological Sciences, Center for Reproductive Biology, Washington State University, Pullman, WA 99164-4236, United States
Wheeler, P.A., School of Biological Sciences, Center for Reproductive Biology, Washington State University, Pullman, WA 99164-4236, United States
LaPatra, S.E., Clear Springs Foods, Inc., PO Box 712, Buhl, ID 83316, United States
Drew, R.E., Department of Biological Sciences, University of Idaho, Moscow, ID 83844-4051, United States
Thorgaard, G.H., School of Biological Sciences, Center for Reproductive Biology, Washington State University, Pullman, WA 99164-4236, United States
Facilitators :
From page:
156
To page:
163
(
Total pages:
8
)
Abstract:
Infectious hematopoietic necrosis virus (IHNV) is a major constraint to rainbow trout culture. Yellowstone cutthroat trout (Oncorhynchus clarki bouvieri) have greater resistance to this virus than do rainbow trout (O. mykiss), but the genetic mechanism of this resistance is not understood. We conducted a genome scan using a backcross of cutthroat trout into a rainbow trout background to estimate the number and locations of quantitative trait loci (QTL) associated with IHNV resistance and growth in trout. IHNV resistance was considered in terms of both survival (binary trait) and days to death (quantitative trait). The genetic map was scanned using interval mapping via two different approaches: one model considered survival alone and a second two-part model combined both survival and days to death. Three QTL were significantly (P ≤ 0.05) associated with virus resistance genome-wide, explaining 32.5% of the phenotypic variation. Cutthroat alleles at two of these QTL resulted in increased resistance to the pathogen, as expected. No growth QTL were detected in this cross. We suggest that these traits are genetically independent. © 2008 Elsevier B.V. All rights reserved.
Note:
Related Files :
disease resistance
genetic analysis
Oncorhynchus clarki bouvieri
Rainbow trout
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Related Content
More details
DOI :
10.1016/j.aquaculture.2008.03.001
Article number:
0
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
28450
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:39
You may also be interested in
Scientific Publication
QTL for IHNV resistance and growth identified in a rainbow (Oncorhynchus mykiss) × Yellowstone cutthroat (Oncorhynchus clarki bouvieri) trout cross
277
Barroso, R.M., School of Biological Sciences, Center for Reproductive Biology, Washington State University, Pullman, WA 99164-4236, United States
Wheeler, P.A., School of Biological Sciences, Center for Reproductive Biology, Washington State University, Pullman, WA 99164-4236, United States
LaPatra, S.E., Clear Springs Foods, Inc., PO Box 712, Buhl, ID 83316, United States
Drew, R.E., Department of Biological Sciences, University of Idaho, Moscow, ID 83844-4051, United States
Thorgaard, G.H., School of Biological Sciences, Center for Reproductive Biology, Washington State University, Pullman, WA 99164-4236, United States
QTL for IHNV resistance and growth identified in a rainbow (Oncorhynchus mykiss) × Yellowstone cutthroat (Oncorhynchus clarki bouvieri) trout cross
Infectious hematopoietic necrosis virus (IHNV) is a major constraint to rainbow trout culture. Yellowstone cutthroat trout (Oncorhynchus clarki bouvieri) have greater resistance to this virus than do rainbow trout (O. mykiss), but the genetic mechanism of this resistance is not understood. We conducted a genome scan using a backcross of cutthroat trout into a rainbow trout background to estimate the number and locations of quantitative trait loci (QTL) associated with IHNV resistance and growth in trout. IHNV resistance was considered in terms of both survival (binary trait) and days to death (quantitative trait). The genetic map was scanned using interval mapping via two different approaches: one model considered survival alone and a second two-part model combined both survival and days to death. Three QTL were significantly (P ≤ 0.05) associated with virus resistance genome-wide, explaining 32.5% of the phenotypic variation. Cutthroat alleles at two of these QTL resulted in increased resistance to the pathogen, as expected. No growth QTL were detected in this cross. We suggest that these traits are genetically independent. © 2008 Elsevier B.V. All rights reserved.
Scientific Publication
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