Effects of non-genetic factors on growth traits and age at first lambing in Corriedale sheep
Data pertaining to Corriedale sheep (4,367 birth records) spanning over a period of 25 years from 1989 to 2013 was analyzed with the Mixed Model Least Square and Maximum Likelihood algorithms to assess fixed effects of year, sex, type of birth and age of dam on various growth traits and age at firs...
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| Format: | Article |
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Indian Council of Agricultural Research
2020-09-01
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| Series: | Indian Journal of Animal Sciences |
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| Online Access: | https://epubs.icar.org.in/index.php/IJAnS/article/view/104995 |
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| author | MOHMMAD ASHRAF BABA T A S GANAI SAFEER ALAM MUBASHIR ALI RATHER AMBREEN HAMADANI |
| author_facet | MOHMMAD ASHRAF BABA T A S GANAI SAFEER ALAM MUBASHIR ALI RATHER AMBREEN HAMADANI |
| author_sort | MOHMMAD ASHRAF BABA |
| collection | DOAJ |
| description |
Data pertaining to Corriedale sheep (4,367 birth records) spanning over a period of 25 years from 1989 to 2013 was analyzed with the Mixed Model Least Square and Maximum Likelihood algorithms to assess fixed effects of year, sex, type of birth and age of dam on various growth traits and age at first lambing. The averages were 3.69, 12.16, 17.65, 22.45, 34.59 and 893.41 for birth weight (BW), weaning weight (WW), 6 month body weight (W6), 12 month body weight (W12), 18 month body weight (W18) and age at first lambing (AFL) respectively. The overall least square means (kg) for BW, WW, W6, W12, W18 and AFL (day) were 3.20±0.091, 11.05±0.408, 16.06±0.452, 21.69±0.722, 33.425±0.776 and 882.50±11.33 respectively. Year of birth had a highly significant influence on all the studied traits. The effect of type of the birth was significant on BW, WW, W6 but non-significant on W12, W18 and AFL. Sex of the lamb had a significant effect on BW, WW, W6 and W12 and non-significant effect on W18. Dam age had a significant effect on all the body weight traits except W18. It also had a significant effect on AFL. The overview of the study reveals that the non-genetic factors affected growth traits and age at first lambing therefore should be taken into consideration while evaluating the performance of the animals. The germplasm of the Corriedale breed which is a mutton breed of sheep can be improved by selection of good animals and improving the management conditions.
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| first_indexed | 2024-04-10T07:48:55Z |
| format | Article |
| id | doaj.art-8cd84228eb8a4d8d86e8b45ae83cd4a2 |
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| issn | 0367-8318 2394-3327 |
| language | English |
| last_indexed | 2024-04-10T07:48:55Z |
| publishDate | 2020-09-01 |
| publisher | Indian Council of Agricultural Research |
| record_format | Article |
| series | Indian Journal of Animal Sciences |
| spelling | doaj.art-8cd84228eb8a4d8d86e8b45ae83cd4a22023-02-23T10:21:38ZengIndian Council of Agricultural ResearchIndian Journal of Animal Sciences0367-83182394-33272020-09-0190610.56093/ijans.v90i6.104995Effects of non-genetic factors on growth traits and age at first lambing in Corriedale sheepMOHMMAD ASHRAF BABA0T A S GANAI1SAFEER ALAM2MUBASHIR ALI RATHER3AMBREEN HAMADANI4Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Jammu and Kashmir 190 006 IndiaSher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Jammu and Kashmir 190 006 IndiaSher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Jammu and Kashmir 190 006 IndiaSher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Jammu and Kashmir 190 006 IndiaSher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir, Jammu and Kashmir 190 006 India Data pertaining to Corriedale sheep (4,367 birth records) spanning over a period of 25 years from 1989 to 2013 was analyzed with the Mixed Model Least Square and Maximum Likelihood algorithms to assess fixed effects of year, sex, type of birth and age of dam on various growth traits and age at first lambing. The averages were 3.69, 12.16, 17.65, 22.45, 34.59 and 893.41 for birth weight (BW), weaning weight (WW), 6 month body weight (W6), 12 month body weight (W12), 18 month body weight (W18) and age at first lambing (AFL) respectively. The overall least square means (kg) for BW, WW, W6, W12, W18 and AFL (day) were 3.20±0.091, 11.05±0.408, 16.06±0.452, 21.69±0.722, 33.425±0.776 and 882.50±11.33 respectively. Year of birth had a highly significant influence on all the studied traits. The effect of type of the birth was significant on BW, WW, W6 but non-significant on W12, W18 and AFL. Sex of the lamb had a significant effect on BW, WW, W6 and W12 and non-significant effect on W18. Dam age had a significant effect on all the body weight traits except W18. It also had a significant effect on AFL. The overview of the study reveals that the non-genetic factors affected growth traits and age at first lambing therefore should be taken into consideration while evaluating the performance of the animals. The germplasm of the Corriedale breed which is a mutton breed of sheep can be improved by selection of good animals and improving the management conditions. https://epubs.icar.org.in/index.php/IJAnS/article/view/104995CorriedaleGrowth traitsLeast square meansNon-genetic factors |
| spellingShingle | MOHMMAD ASHRAF BABA T A S GANAI SAFEER ALAM MUBASHIR ALI RATHER AMBREEN HAMADANI Effects of non-genetic factors on growth traits and age at first lambing in Corriedale sheep Indian Journal of Animal Sciences Corriedale Growth traits Least square means Non-genetic factors |
| title | Effects of non-genetic factors on growth traits and age at first lambing in Corriedale sheep |
| title_full | Effects of non-genetic factors on growth traits and age at first lambing in Corriedale sheep |
| title_fullStr | Effects of non-genetic factors on growth traits and age at first lambing in Corriedale sheep |
| title_full_unstemmed | Effects of non-genetic factors on growth traits and age at first lambing in Corriedale sheep |
| title_short | Effects of non-genetic factors on growth traits and age at first lambing in Corriedale sheep |
| title_sort | effects of non genetic factors on growth traits and age at first lambing in corriedale sheep |
| topic | Corriedale Growth traits Least square means Non-genetic factors |
| url | https://epubs.icar.org.in/index.php/IJAnS/article/view/104995 |
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