Genotype by environment interaction for sexual maturity in Atlantic salmon (Salmo salar)
Genetic parameters and genotype by environment interactions were estimated for early sexual maturity in Atlantic salmon. About 23984 (24999) individuals from 115 (118) full-sib families were tested in six sea-cages at five different locations in Norway. After 15 to 16 months in the sea, all individu...
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Norwegian University of Life Sciences, Ås
2015
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ftunivmob:oai:nmbu.brage.unit.no:11250/295589 2023-05-15T15:31:47+02:00 Genotype by environment interaction for sexual maturity in Atlantic salmon (Salmo salar) Xia, Shuwen 2015 application/pdf http://hdl.handle.net/11250/295589 eng eng Norwegian University of Life Sciences, Ås http://hdl.handle.net/11250/295589 Navngivelse 3.0 Norge http://creativecommons.org/licenses/by/3.0/no/ CC-BY 51 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Aquaculture: 922 Master thesis 2015 ftunivmob 2021-09-23T20:15:37Z Genetic parameters and genotype by environment interactions were estimated for early sexual maturity in Atlantic salmon. About 23984 (24999) individuals from 115 (118) full-sib families were tested in six sea-cages at five different locations in Norway. After 15 to 16 months in the sea, all individuals were classified for indications of maturation. Large variation in percentage of maturing were observed at different farms for two year-classes . The heritabilities estimated for early sexual maturity ranged from 0.02 to 0.11 on observed scales, and varied from 0.04 to 0.21 on liability scale. Besides, the heritability estimates on observed scale were roughly two times higher than those on the linear scale. The effects common to full-sibs other than additive genetic effects accounted for less than 5% of the total phenotypic variance on observed scale and less than 7% on liability scale . Gentic correlation were estimated between pairs of test environments, for 0.67 to 0.99 in year-class 1983, and 0.36 to 0.99 in year-class 1987. Most estimates of genetic correlation were significantly different from unity which indicated the presence of genotype by environment interaction. The low and significant correlations of effects common to full-sibs were estimated which indicates the effects common to full-sibs became smaller after separating into production environments. The genetic gain was calculated based on estimated breeding values of full-sib families, and unfavorable genetic gains were observed in present study both for expect gain and and realized gain. M-AA Master Thesis Atlantic salmon Salmo salar Open archive Norwegian University of Life Sciences: Brage NMBU Norway |
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Open Polar |
collection |
Open archive Norwegian University of Life Sciences: Brage NMBU |
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ftunivmob |
language |
English |
topic |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Aquaculture: 922 |
spellingShingle |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Aquaculture: 922 Xia, Shuwen Genotype by environment interaction for sexual maturity in Atlantic salmon (Salmo salar) |
topic_facet |
VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920::Aquaculture: 922 |
description |
Genetic parameters and genotype by environment interactions were estimated for early sexual maturity in Atlantic salmon. About 23984 (24999) individuals from 115 (118) full-sib families were tested in six sea-cages at five different locations in Norway. After 15 to 16 months in the sea, all individuals were classified for indications of maturation. Large variation in percentage of maturing were observed at different farms for two year-classes . The heritabilities estimated for early sexual maturity ranged from 0.02 to 0.11 on observed scales, and varied from 0.04 to 0.21 on liability scale. Besides, the heritability estimates on observed scale were roughly two times higher than those on the linear scale. The effects common to full-sibs other than additive genetic effects accounted for less than 5% of the total phenotypic variance on observed scale and less than 7% on liability scale . Gentic correlation were estimated between pairs of test environments, for 0.67 to 0.99 in year-class 1983, and 0.36 to 0.99 in year-class 1987. Most estimates of genetic correlation were significantly different from unity which indicated the presence of genotype by environment interaction. The low and significant correlations of effects common to full-sibs were estimated which indicates the effects common to full-sibs became smaller after separating into production environments. The genetic gain was calculated based on estimated breeding values of full-sib families, and unfavorable genetic gains were observed in present study both for expect gain and and realized gain. M-AA |
format |
Master Thesis |
author |
Xia, Shuwen |
author_facet |
Xia, Shuwen |
author_sort |
Xia, Shuwen |
title |
Genotype by environment interaction for sexual maturity in Atlantic salmon (Salmo salar) |
title_short |
Genotype by environment interaction for sexual maturity in Atlantic salmon (Salmo salar) |
title_full |
Genotype by environment interaction for sexual maturity in Atlantic salmon (Salmo salar) |
title_fullStr |
Genotype by environment interaction for sexual maturity in Atlantic salmon (Salmo salar) |
title_full_unstemmed |
Genotype by environment interaction for sexual maturity in Atlantic salmon (Salmo salar) |
title_sort |
genotype by environment interaction for sexual maturity in atlantic salmon (salmo salar) |
publisher |
Norwegian University of Life Sciences, Ås |
publishDate |
2015 |
url |
http://hdl.handle.net/11250/295589 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
51 |
op_relation |
http://hdl.handle.net/11250/295589 |
op_rights |
Navngivelse 3.0 Norge http://creativecommons.org/licenses/by/3.0/no/ |
op_rightsnorm |
CC-BY |
_version_ |
1766362298828455936 |