Estimation of the Genetic Parameters for Test-Day Milk, in Teleorman Black Head Sheep
The objective of this study was to determine the genetic parameters represented by heritability for test-day milk yield and the genetic correlation between test-days milk yield and the breeding value for Teleorman Black Head sheep. The genetic parameters of daily milk yield during the first three la...
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Agroprint Timisoara
2023-09-01
|
| Series: | Scientific Papers Animal Science and Biotechnologies |
| Subjects: | |
| Online Access: | https://spasb.ro/index.php/public_html/article/view/851 |
| _version_ | 1797215005460922368 |
|---|---|
| author | Rodica Stefania Pelmus Horia Grosu Mircea Catalin Rotar Mihail Alexandru Gras Cristina Lazar Florin Popa Elena Ghita |
| author_facet | Rodica Stefania Pelmus Horia Grosu Mircea Catalin Rotar Mihail Alexandru Gras Cristina Lazar Florin Popa Elena Ghita |
| author_sort | Rodica Stefania Pelmus |
| collection | DOAJ |
| description | The objective of this study was to determine the genetic parameters represented by heritability for test-day milk yield and the genetic correlation between test-days milk yield and the breeding value for Teleorman Black Head sheep. The genetic parameters of daily milk yield during the first three lactations of Teleorman Black Head ewes were estimated with the random regression test-day animal model. Data consisted of 631 test-day records of 81 ewes at first lactation, 351 test-day records of 58 ewes at second lactation and 229 test-day records of 33 ewes at third lactation from experimental farm of INCDBNA Balotesti. Lactations were analysed separately. The heritability estimates for test-day milk yield of ewes at first lactation ranged from 0.015 at 200 day in milk to 0.19 at 10 day in milk. For the ewes at second lactation the heritability estimates ranged from 0.016 at 180th in milk to 0.246 at 10 day in milk. For the ewes at third lactation the heritability estimates for test day milk yield ranged from 0.018 at 180th in milk to 0.249 at 10th day in milk. Genetic correlations between individual test days milk yield were high and positive. |
| first_indexed | 2024-04-24T11:23:11Z |
| format | Article |
| id | doaj.art-1ec3319e2bad4bc9b688183e146d4d4d |
| institution | Directory Open Access Journal |
| issn | 1841-9364 2344-4576 |
| language | English |
| last_indexed | 2024-04-24T11:23:11Z |
| publishDate | 2023-09-01 |
| publisher | Agroprint Timisoara |
| record_format | Article |
| series | Scientific Papers Animal Science and Biotechnologies |
| spelling | doaj.art-1ec3319e2bad4bc9b688183e146d4d4d2024-04-11T03:54:56ZengAgroprint TimisoaraScientific Papers Animal Science and Biotechnologies1841-93642344-45762023-09-015215656851Estimation of the Genetic Parameters for Test-Day Milk, in Teleorman Black Head SheepRodica Stefania Pelmus0Horia Grosu1Mircea Catalin Rotar2Mihail Alexandru Gras3Cristina Lazar4Florin Popa5Elena Ghita6National Research-Development Institute for Animal Biology and Nutrition, 1, Calea Bucuresti, 077015, Balotesti, RomaniaNational Research-Development Institute for Animal Biology and Nutrition, 1, Calea Bucuresti, 077015, Balotesti, RomaniaNational Research-Development Institute for Animal Biology and Nutrition, 1, Calea Bucuresti, 077015, Balotesti, RomaniaNational Research-Development Institute for Animal Biology and Nutrition, 1, Calea Bucuresti, 077015, Balotesti, RomaniaNational Research-Development Institute for Animal Biology and Nutrition, 1, Calea Bucuresti, 077015, Balotesti, RomaniaNational Research-Development Institute for Animal Biology and Nutrition, 1, Calea Bucuresti, 077015, Balotesti, RomaniaNational Research-Development Institute for Animal Biology and Nutrition, 1, Calea Bucuresti, 077015, Balotesti, RomaniaThe objective of this study was to determine the genetic parameters represented by heritability for test-day milk yield and the genetic correlation between test-days milk yield and the breeding value for Teleorman Black Head sheep. The genetic parameters of daily milk yield during the first three lactations of Teleorman Black Head ewes were estimated with the random regression test-day animal model. Data consisted of 631 test-day records of 81 ewes at first lactation, 351 test-day records of 58 ewes at second lactation and 229 test-day records of 33 ewes at third lactation from experimental farm of INCDBNA Balotesti. Lactations were analysed separately. The heritability estimates for test-day milk yield of ewes at first lactation ranged from 0.015 at 200 day in milk to 0.19 at 10 day in milk. For the ewes at second lactation the heritability estimates ranged from 0.016 at 180th in milk to 0.246 at 10 day in milk. For the ewes at third lactation the heritability estimates for test day milk yield ranged from 0.018 at 180th in milk to 0.249 at 10th day in milk. Genetic correlations between individual test days milk yield were high and positive.https://spasb.ro/index.php/public_html/article/view/851breeding valuerandom regression modeltest day milk yieldewesgenetic parameters |
| spellingShingle | Rodica Stefania Pelmus Horia Grosu Mircea Catalin Rotar Mihail Alexandru Gras Cristina Lazar Florin Popa Elena Ghita Estimation of the Genetic Parameters for Test-Day Milk, in Teleorman Black Head Sheep Scientific Papers Animal Science and Biotechnologies breeding value random regression model test day milk yield ewes genetic parameters |
| title | Estimation of the Genetic Parameters for Test-Day Milk, in Teleorman Black Head Sheep |
| title_full | Estimation of the Genetic Parameters for Test-Day Milk, in Teleorman Black Head Sheep |
| title_fullStr | Estimation of the Genetic Parameters for Test-Day Milk, in Teleorman Black Head Sheep |
| title_full_unstemmed | Estimation of the Genetic Parameters for Test-Day Milk, in Teleorman Black Head Sheep |
| title_short | Estimation of the Genetic Parameters for Test-Day Milk, in Teleorman Black Head Sheep |
| title_sort | estimation of the genetic parameters for test day milk in teleorman black head sheep |
| topic | breeding value random regression model test day milk yield ewes genetic parameters |
| url | https://spasb.ro/index.php/public_html/article/view/851 |
| work_keys_str_mv | AT rodicastefaniapelmus estimationofthegeneticparametersfortestdaymilkinteleormanblackheadsheep AT horiagrosu estimationofthegeneticparametersfortestdaymilkinteleormanblackheadsheep AT mirceacatalinrotar estimationofthegeneticparametersfortestdaymilkinteleormanblackheadsheep AT mihailalexandrugras estimationofthegeneticparametersfortestdaymilkinteleormanblackheadsheep AT cristinalazar estimationofthegeneticparametersfortestdaymilkinteleormanblackheadsheep AT florinpopa estimationofthegeneticparametersfortestdaymilkinteleormanblackheadsheep AT elenaghita estimationofthegeneticparametersfortestdaymilkinteleormanblackheadsheep |