Genetic and non-genetic parameter estimates for growth traits and Kleiber ratios in Dorper × indigenous sheep
Genetic improvement programme will only be successful when accompanied by a good understanding of the influence of different environmental factors, knowledge of the genetic parameters and the genetic relationships between the traits of interest. This study aimed to evaluate the influence of non-gene...
| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Journal Article |
| Language: | Inglés |
| Published: |
Elsevier
2022
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10568/126563 |
| _version_ | 1855522652401172480 |
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| author | Tesema, Zeleke Deribe, Belay Lakew, Mesfin Getachew, Tesfaye Tilahun, Mekonnen Belayneh, Negus Kefale, Alemu Shibeshi, Mekonnen Zegeye, Asres Yizengaw, Liuel Alebachew, Getachew W. Tiruneh, Solomon Kiros, Shambel Asfaw, Mengesha Bishaw, Molla |
| author_browse | Alebachew, Getachew W. Asfaw, Mengesha Belayneh, Negus Bishaw, Molla Deribe, Belay Getachew, Tesfaye Kefale, Alemu Kiros, Shambel Lakew, Mesfin Shibeshi, Mekonnen Tesema, Zeleke Tilahun, Mekonnen Tiruneh, Solomon Yizengaw, Liuel Zegeye, Asres |
| author_facet | Tesema, Zeleke Deribe, Belay Lakew, Mesfin Getachew, Tesfaye Tilahun, Mekonnen Belayneh, Negus Kefale, Alemu Shibeshi, Mekonnen Zegeye, Asres Yizengaw, Liuel Alebachew, Getachew W. Tiruneh, Solomon Kiros, Shambel Asfaw, Mengesha Bishaw, Molla |
| author_sort | Tesema, Zeleke |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Genetic improvement programme will only be successful when accompanied by a good understanding of
the influence of different environmental factors, knowledge of the genetic parameters and the genetic
relationships between the traits of interest. This study aimed to evaluate the influence of non-genetic fac-
tors on growth traits and Kleiber ratios and to estimate genetic parameters for early growth traits in
Dorper indigenous crossbred sheep. The effects of fixed factors were analysed by the general linear
model procedure of statistical analysis system, while the genetic parameters were estimated using a
WOMBAT computer program fitted animal model. The overall least-square mean for birth weight
(BRW), weaning weight (3MW), six-month weight, nine-month weight, and yearling weight were
3.03 ± 0.02, 14.5 ± 0.18, 20.4 ± 0.26, 24.8 ± 0.31, and 28.3 ± 0.40 kg, respectively. The overall least-
square mean for Kleiber ratio from birth to weaning (KR1), weaning to six months, six to nine months
and nine months to yearling age were 16.8 ± 0.10, 6.41 ± 0.17, 4.55 ± 0.21 and 3.38 ± 0.20 g/kg of meta-
bolic weight, respectively. The inclusion of maternal genetic effect had a significant influence on BRW,
and it explains 20% of the phenotypic variation. The total heritability estimates for BRW, 3MW, birth
to weaning average daily weight gain and KR1 were 0.10, 0.14, 0.16 and 0.12, respectively. The pheno-
typic correlation varied from 0.11 ± 0.05 to 0.98 ± 0.02, whereas the direct genetic correlation ranged
from 0.32 ± 0.40 to 0.98 ± 0.17. The mean inbreeding coefficient was 0.105% with an annual rate of
0.02%. The heritability estimates for growth traits and Kleiber ratio suggest that slow genetic progress
would be expected from the selection. However, the integration of selection with crossbreeding pro-
gramme can enhance genetic gain. Therefore, selection should be conducted based on breeding values
estimated from multiple information sources to increase the selection response. |
| format | Journal Article |
| id | CGSpace126563 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 2022 |
| publishDateRange | 2022 |
| publishDateSort | 2022 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | CGSpace1265632026-01-15T02:06:31Z Genetic and non-genetic parameter estimates for growth traits and Kleiber ratios in Dorper × indigenous sheep Tesema, Zeleke Deribe, Belay Lakew, Mesfin Getachew, Tesfaye Tilahun, Mekonnen Belayneh, Negus Kefale, Alemu Shibeshi, Mekonnen Zegeye, Asres Yizengaw, Liuel Alebachew, Getachew W. Tiruneh, Solomon Kiros, Shambel Asfaw, Mengesha Bishaw, Molla sheep heritability goal 1 no poverty genetic correlation inbreeding coefficient sheep genetic trend poverty reduction, livelihoods and jobs maternal effect Genetic improvement programme will only be successful when accompanied by a good understanding of the influence of different environmental factors, knowledge of the genetic parameters and the genetic relationships between the traits of interest. This study aimed to evaluate the influence of non-genetic fac- tors on growth traits and Kleiber ratios and to estimate genetic parameters for early growth traits in Dorper indigenous crossbred sheep. The effects of fixed factors were analysed by the general linear model procedure of statistical analysis system, while the genetic parameters were estimated using a WOMBAT computer program fitted animal model. The overall least-square mean for birth weight (BRW), weaning weight (3MW), six-month weight, nine-month weight, and yearling weight were 3.03 ± 0.02, 14.5 ± 0.18, 20.4 ± 0.26, 24.8 ± 0.31, and 28.3 ± 0.40 kg, respectively. The overall least- square mean for Kleiber ratio from birth to weaning (KR1), weaning to six months, six to nine months and nine months to yearling age were 16.8 ± 0.10, 6.41 ± 0.17, 4.55 ± 0.21 and 3.38 ± 0.20 g/kg of meta- bolic weight, respectively. The inclusion of maternal genetic effect had a significant influence on BRW, and it explains 20% of the phenotypic variation. The total heritability estimates for BRW, 3MW, birth to weaning average daily weight gain and KR1 were 0.10, 0.14, 0.16 and 0.12, respectively. The pheno- typic correlation varied from 0.11 ± 0.05 to 0.98 ± 0.02, whereas the direct genetic correlation ranged from 0.32 ± 0.40 to 0.98 ± 0.17. The mean inbreeding coefficient was 0.105% with an annual rate of 0.02%. The heritability estimates for growth traits and Kleiber ratio suggest that slow genetic progress would be expected from the selection. However, the integration of selection with crossbreeding pro- gramme can enhance genetic gain. Therefore, selection should be conducted based on breeding values estimated from multiple information sources to increase the selection response. 2022-06-01 2023-01-04T18:10:28Z 2023-01-04T18:10:28Z Journal Article https://hdl.handle.net/10568/126563 en Open Access application/pdf Elsevier Zeleke Tesema, Belay Deribe, Mesfin Lakew, Tesfaye Getachew, Mekonnen Tilahun, Negus Belayneh, Alemu Kefale, Mekonnen Shibeshi, Asres Zegeye, Liuel Yizengaw, Getachew W. Alebachew, Solomon Tiruneh, Shambel Kiros, Mengesha Asfaw, Molla Bishaw. (1/6/2022). Genetic and non-genetic parameter estimates for growth traits and Kleiber ratios in Dorper × indigenous sheep. animal, 16 (6). |
| spellingShingle | sheep heritability goal 1 no poverty genetic correlation inbreeding coefficient sheep genetic trend poverty reduction, livelihoods and jobs maternal effect Tesema, Zeleke Deribe, Belay Lakew, Mesfin Getachew, Tesfaye Tilahun, Mekonnen Belayneh, Negus Kefale, Alemu Shibeshi, Mekonnen Zegeye, Asres Yizengaw, Liuel Alebachew, Getachew W. Tiruneh, Solomon Kiros, Shambel Asfaw, Mengesha Bishaw, Molla Genetic and non-genetic parameter estimates for growth traits and Kleiber ratios in Dorper × indigenous sheep |
| title | Genetic and non-genetic parameter estimates for growth traits and Kleiber ratios in Dorper × indigenous sheep |
| title_full | Genetic and non-genetic parameter estimates for growth traits and Kleiber ratios in Dorper × indigenous sheep |
| title_fullStr | Genetic and non-genetic parameter estimates for growth traits and Kleiber ratios in Dorper × indigenous sheep |
| title_full_unstemmed | Genetic and non-genetic parameter estimates for growth traits and Kleiber ratios in Dorper × indigenous sheep |
| title_short | Genetic and non-genetic parameter estimates for growth traits and Kleiber ratios in Dorper × indigenous sheep |
| title_sort | genetic and non genetic parameter estimates for growth traits and kleiber ratios in dorper indigenous sheep |
| topic | sheep heritability goal 1 no poverty genetic correlation inbreeding coefficient sheep genetic trend poverty reduction, livelihoods and jobs maternal effect |
| url | https://hdl.handle.net/10568/126563 |
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