Estimation of genetic parameters for chosen udder traits of different dairy ewes
Morphology of udder in ewes in one experimental herd was examined on the basis of linear evaluation (7 traits; 9 points scale; 1145 data for each trait) and exact measurements of udder (6 parameters; 1055 measurements at each trait) were taken. Estimation of covariance components and genetic paramet...
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| Format: | Article |
| Language: | English |
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Indian Council of Agricultural Research
2019-05-01
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| Series: | Indian Journal of Animal Sciences |
| Subjects: | |
| Online Access: | https://epubs.icar.org.in/index.php/IJAnS/article/view/90030 |
| _version_ | 1797896689604886528 |
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| author | PAVOL MAKOVICKÝ PETER MAKOVICKY MILAN MARGETÍN MELINDA NAGY |
| author_facet | PAVOL MAKOVICKÝ PETER MAKOVICKY MILAN MARGETÍN MELINDA NAGY |
| author_sort | PAVOL MAKOVICKÝ |
| collection | DOAJ |
| description | Morphology of udder in ewes in one experimental herd was examined on the basis of linear evaluation (7 traits; 9 points scale; 1145 data for each trait) and exact measurements of udder (6 parameters; 1055 measurements at each trait) were taken. Estimation of covariance components and genetic parameters were done using REML and BLUP-AM (VCE 4.0 package) for 7 traits (linear evaluation) or 6 traits (udder measurements) . Heritability coefficients for individual traits of linear evaluation varied from 0.090–0.294. Heritability coefficient (h2) for teat position was 0.242, 0.275 for teat size , and 0.294 for cistern depth, which is related to teat position. The highest value of genetic correlation (rg=0.980) was found between cistern depth and teat position. Negative genetic correlation was detected between teat position and teat size (–0.381), and teat position and udder cleft (–0.404). Heritability coefficients and genetic correlations of exact measurements of udder were comparable with traits of linear evaluation. For the parameter, udder length and rear udder depth, the detected band-measures were h2 = 0.219 or 0.223. Highest h2 was found for cistern depth (0.480), teat length (0.358) and teat angle (0.290) similar to linear evaluation. |
| first_indexed | 2024-04-10T07:46:45Z |
| format | Article |
| id | doaj.art-86d58268cd89431886a32da9d10faa6e |
| institution | Directory Open Access Journal |
| issn | 0367-8318 2394-3327 |
| language | English |
| last_indexed | 2024-04-10T07:46:45Z |
| publishDate | 2019-05-01 |
| publisher | Indian Council of Agricultural Research |
| record_format | Article |
| series | Indian Journal of Animal Sciences |
| spelling | doaj.art-86d58268cd89431886a32da9d10faa6e2023-02-23T10:34:24ZengIndian Council of Agricultural ResearchIndian Journal of Animal Sciences0367-83182394-33272019-05-0189510.56093/ijans.v89i5.90030Estimation of genetic parameters for chosen udder traits of different dairy ewesPAVOL MAKOVICKÝ0PETER MAKOVICKY1MILAN MARGETÍN2MELINDA NAGY3Assistant Professor, J Selye University, Bratislavsk¡ cesta 3322, 945 01 Kom¡rno, Slovak RepublicAssistant Professor, Laboratory of Veterinary Histopathology in Komárno, Komárno, Slovak RepublicProfessor, Faculty of Agrobiology and FoodResources, Department of Animal Production, Slovak University of Agriculture, Nitra, Slovak Republic.Associate Professor, J Selye University, Bratislavská cesta 3322, 945 01 Komárno, Slovak RepublicMorphology of udder in ewes in one experimental herd was examined on the basis of linear evaluation (7 traits; 9 points scale; 1145 data for each trait) and exact measurements of udder (6 parameters; 1055 measurements at each trait) were taken. Estimation of covariance components and genetic parameters were done using REML and BLUP-AM (VCE 4.0 package) for 7 traits (linear evaluation) or 6 traits (udder measurements) . Heritability coefficients for individual traits of linear evaluation varied from 0.090–0.294. Heritability coefficient (h2) for teat position was 0.242, 0.275 for teat size , and 0.294 for cistern depth, which is related to teat position. The highest value of genetic correlation (rg=0.980) was found between cistern depth and teat position. Negative genetic correlation was detected between teat position and teat size (–0.381), and teat position and udder cleft (–0.404). Heritability coefficients and genetic correlations of exact measurements of udder were comparable with traits of linear evaluation. For the parameter, udder length and rear udder depth, the detected band-measures were h2 = 0.219 or 0.223. Highest h2 was found for cistern depth (0.480), teat length (0.358) and teat angle (0.290) similar to linear evaluation.https://epubs.icar.org.in/index.php/IJAnS/article/view/90030Dairy ewesGenetic parametersMilk productionUdder traits |
| spellingShingle | PAVOL MAKOVICKÝ PETER MAKOVICKY MILAN MARGETÍN MELINDA NAGY Estimation of genetic parameters for chosen udder traits of different dairy ewes Indian Journal of Animal Sciences Dairy ewes Genetic parameters Milk production Udder traits |
| title | Estimation of genetic parameters for chosen udder traits of different dairy ewes |
| title_full | Estimation of genetic parameters for chosen udder traits of different dairy ewes |
| title_fullStr | Estimation of genetic parameters for chosen udder traits of different dairy ewes |
| title_full_unstemmed | Estimation of genetic parameters for chosen udder traits of different dairy ewes |
| title_short | Estimation of genetic parameters for chosen udder traits of different dairy ewes |
| title_sort | estimation of genetic parameters for chosen udder traits of different dairy ewes |
| topic | Dairy ewes Genetic parameters Milk production Udder traits |
| url | https://epubs.icar.org.in/index.php/IJAnS/article/view/90030 |
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