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: | Article |
| Language: | English |
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Elsevier
2022-06-01
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| Series: | Animal |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1751731122000842 |
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| author | Zeleke Tesema Belay Deribe Mesfin Lakew Tesfaye Getachew Mekonnen Tilahun Negus Belayneh Alemu Kefale Mekonnen Shibesh Asres Zegeye Liuel Yizengaw Getachew W. Alebachew Solomon Tiruneh Shambel Kiros Mengesha Asfaw Molla Bishaw |
| author_facet | Zeleke Tesema Belay Deribe Mesfin Lakew Tesfaye Getachew Mekonnen Tilahun Negus Belayneh Alemu Kefale Mekonnen Shibesh Asres Zegeye Liuel Yizengaw Getachew W. Alebachew Solomon Tiruneh Shambel Kiros Mengesha Asfaw Molla Bishaw |
| author_sort | Zeleke Tesema |
| collection | DOAJ |
| 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 factors 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 metabolic 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 phenotypic 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 programme can enhance genetic gain. Therefore, selection should be conducted based on breeding values estimated from multiple information sources to increase the selection response. |
| first_indexed | 2024-12-12T05:33:00Z |
| format | Article |
| id | doaj.art-dadc91078e554553849961d7ff6bd482 |
| institution | Directory Open Access Journal |
| issn | 1751-7311 |
| language | English |
| last_indexed | 2024-12-12T05:33:00Z |
| publishDate | 2022-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Animal |
| spelling | doaj.art-dadc91078e554553849961d7ff6bd4822022-12-22T00:36:15ZengElsevierAnimal1751-73112022-06-01166100533Genetic and non-genetic parameter estimates for growth traits and Kleiber ratios in Dorper × indigenous sheepZeleke Tesema0Belay Deribe1Mesfin Lakew2Tesfaye Getachew3Mekonnen Tilahun4Negus Belayneh5Alemu Kefale6Mekonnen Shibesh7Asres Zegeye8Liuel Yizengaw9Getachew W. Alebachew10Solomon Tiruneh11Shambel Kiros12Mengesha Asfaw13Molla Bishaw14Sirinka Agricultural Research Center, P.O. Box 74, Woldia, Ethiopia; Corresponding author.Sirinka Agricultural Research Center, P.O. Box 74, Woldia, EthiopiaAmhara Agricultural Research Institute, P.O. Box 527, Bahir Dar, EthiopiaInternational Center for Agricultural Research in the Dry Areas (ICARDA), Addis Ababa, EthiopiaAndasa Livestock Research Center, P.O. Box 27, Bahir Dar, EthiopiaAndasa Livestock Research Center, P.O. Box 27, Bahir Dar, EthiopiaSirinka Agricultural Research Center, P.O. Box 74, Woldia, EthiopiaSirinka Agricultural Research Center, P.O. Box 74, Woldia, EthiopiaSirinka Agricultural Research Center, P.O. Box 74, Woldia, EthiopiaSirinka Agricultural Research Center, P.O. Box 74, Woldia, EthiopiaSirinka Agricultural Research Center, P.O. Box 74, Woldia, EthiopiaSirinka Agricultural Research Center, P.O. Box 74, Woldia, EthiopiaSirinka Agricultural Research Center, P.O. Box 74, Woldia, EthiopiaSirinka Agricultural Research Center, P.O. Box 74, Woldia, EthiopiaSirinka Agricultural Research Center, P.O. Box 74, Woldia, EthiopiaGenetic 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 factors 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 metabolic 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 phenotypic 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 programme can enhance genetic gain. Therefore, selection should be conducted based on breeding values estimated from multiple information sources to increase the selection response.http://www.sciencedirect.com/science/article/pii/S1751731122000842Genetic correlationGenetic trendHeritabilityInbreeding coefficientMaternal effect |
| spellingShingle | Zeleke Tesema Belay Deribe Mesfin Lakew Tesfaye Getachew Mekonnen Tilahun Negus Belayneh Alemu Kefale Mekonnen Shibesh Asres Zegeye Liuel Yizengaw Getachew W. Alebachew Solomon Tiruneh Shambel Kiros Mengesha Asfaw Molla Bishaw Genetic and non-genetic parameter estimates for growth traits and Kleiber ratios in Dorper × indigenous sheep Animal Genetic correlation Genetic trend Heritability Inbreeding coefficient Maternal effect |
| 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 | Genetic correlation Genetic trend Heritability Inbreeding coefficient Maternal effect |
| url | http://www.sciencedirect.com/science/article/pii/S1751731122000842 |
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