Reproductive performance of sexed versus conventional semen in Holstein heifers in various semiarid regions of Iran
For comparing reproductive performance of sexed versus conventional semen a total of 3573 heifer insemination records collected from five herds in four provinces of Iran were investigated. The studied provinces were classified into three regions: hot semiarid (Tehran and Alborz provinces), temperate...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2017-10-01
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| Series: | Italian Journal of Animal Science |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/1828051X.2017.1321473 |
| _version_ | 1817983588016062464 |
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| author | Sahereh Joezy-Shekalgorabi Ali Maghsoudi Mohammad Reza Mansourian |
| author_facet | Sahereh Joezy-Shekalgorabi Ali Maghsoudi Mohammad Reza Mansourian |
| author_sort | Sahereh Joezy-Shekalgorabi |
| collection | DOAJ |
| description | For comparing reproductive performance of sexed versus conventional semen a total of 3573 heifer insemination records collected from five herds in four provinces of Iran were investigated. The studied provinces were classified into three regions: hot semiarid (Tehran and Alborz provinces), temperate semiarid (Khorasan Razavi province) and cold semiarid (Zanjan province). Various parameters including the conception rate, number of services per conception, calf sex ratio, calf birth weight, gestation length, calving ease score, abortion and stillbirth as well as twining rate were investigated. The logistic regression method was deployed for the analysis of categorical variables while the GLM procedure was applied for the analysis of continuous variables. The average conception rate of sex sorted and conventional semen was 48.3 and 63.8%, respectively. The utilisation of sex sorted semen resulted in 91.1% female calves. The conception rate, number of services per conception, gestation length, calf birth weight and the calf sex ratio were among the reproductive variables that were significantly influenced by the semen sexing. A greater number of services per conception and calving ease score were observed in hot and temperate semiarid areas. These climatic regions also provided a lower incidence of female calf births compared to the cold semiarid regions. Our results highly reaffirm the previous findings on the reproductive performance of sex sorted semen. Yet, climatic and management practices of a herd within a special climate have to be considered when deciding for utilisation of sex sorted semen in a dairy farm. |
| first_indexed | 2024-04-13T23:34:58Z |
| format | Article |
| id | doaj.art-08ca5eed226345cf978dcdda9eb91fdb |
| institution | Directory Open Access Journal |
| issn | 1594-4077 1828-051X |
| language | English |
| last_indexed | 2024-04-13T23:34:58Z |
| publishDate | 2017-10-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Italian Journal of Animal Science |
| spelling | doaj.art-08ca5eed226345cf978dcdda9eb91fdb2022-12-22T02:24:47ZengTaylor & Francis GroupItalian Journal of Animal Science1594-40771828-051X2017-10-0116466667210.1080/1828051X.2017.13214731321473Reproductive performance of sexed versus conventional semen in Holstein heifers in various semiarid regions of IranSahereh Joezy-Shekalgorabi0Ali Maghsoudi1Mohammad Reza Mansourian2Shahr-e-Qods Branch, Islamic Azad UniversityUniversity of ZabolMinistry of Jihad AgricultureFor comparing reproductive performance of sexed versus conventional semen a total of 3573 heifer insemination records collected from five herds in four provinces of Iran were investigated. The studied provinces were classified into three regions: hot semiarid (Tehran and Alborz provinces), temperate semiarid (Khorasan Razavi province) and cold semiarid (Zanjan province). Various parameters including the conception rate, number of services per conception, calf sex ratio, calf birth weight, gestation length, calving ease score, abortion and stillbirth as well as twining rate were investigated. The logistic regression method was deployed for the analysis of categorical variables while the GLM procedure was applied for the analysis of continuous variables. The average conception rate of sex sorted and conventional semen was 48.3 and 63.8%, respectively. The utilisation of sex sorted semen resulted in 91.1% female calves. The conception rate, number of services per conception, gestation length, calf birth weight and the calf sex ratio were among the reproductive variables that were significantly influenced by the semen sexing. A greater number of services per conception and calving ease score were observed in hot and temperate semiarid areas. These climatic regions also provided a lower incidence of female calf births compared to the cold semiarid regions. Our results highly reaffirm the previous findings on the reproductive performance of sex sorted semen. Yet, climatic and management practices of a herd within a special climate have to be considered when deciding for utilisation of sex sorted semen in a dairy farm.http://dx.doi.org/10.1080/1828051X.2017.1321473sexed semenclimatereproductive performanceheiferiran |
| spellingShingle | Sahereh Joezy-Shekalgorabi Ali Maghsoudi Mohammad Reza Mansourian Reproductive performance of sexed versus conventional semen in Holstein heifers in various semiarid regions of Iran Italian Journal of Animal Science sexed semen climate reproductive performance heifer iran |
| title | Reproductive performance of sexed versus conventional semen in Holstein heifers in various semiarid regions of Iran |
| title_full | Reproductive performance of sexed versus conventional semen in Holstein heifers in various semiarid regions of Iran |
| title_fullStr | Reproductive performance of sexed versus conventional semen in Holstein heifers in various semiarid regions of Iran |
| title_full_unstemmed | Reproductive performance of sexed versus conventional semen in Holstein heifers in various semiarid regions of Iran |
| title_short | Reproductive performance of sexed versus conventional semen in Holstein heifers in various semiarid regions of Iran |
| title_sort | reproductive performance of sexed versus conventional semen in holstein heifers in various semiarid regions of iran |
| topic | sexed semen climate reproductive performance heifer iran |
| url | http://dx.doi.org/10.1080/1828051X.2017.1321473 |
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