Sahereh Joezy-Shekalgorabi; Ali Maghsoudi; A.R. Ghiasi; Mohammad Rokouei; Hadi Faraji Arough; Amir Zargaran
Volume 24, Issue 3 , October 2022, , Pages 247-258
Abstract
disadvantages of using sexed semen among dairy producers in terms of outcome and economic efficiency. A questionnaire containing 28 five-choice Likert scale questions was prepared to test the attitudes of respondents concerning the use of sexed sperm in terms of functional, economic, cognitive and ...
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disadvantages of using sexed semen among dairy producers in terms of outcome and economic efficiency. A questionnaire containing 28 five-choice Likert scale questions was prepared to test the attitudes of respondents concerning the use of sexed sperm in terms of functional, economic, cognitive and infrastructural aspects. The respondents were the researchers, consultants and dairy farm employees. The findings indicated that farm employees, unlike the researchers, believed that sexed sperm was effective in reducing dystocia, and the conception rate was not deleteriously affected in differentclimates (P<0.01). Better performance of sex-sorted semen in heifers compared to multiparous cows was significantly confirmed by farm employees and consultants compared to the researchers (P<0.01). According to the researchers, the use sex- sorted semen is uncommon and hence the use of this type of sperm has a higher risk (P<0.01). The results of this study indicated that the attitude of employees in large industrial dairy farms is largely consistent with the scientific facts published in the field of sex-sorted semen, and the disagreement of this
Hamideh Nouri Sadegh; Ali Maghsoudi; Mohammad Rokouei; Hadi Faraju-Arough; Mehdi Jahantigh
Volume 24, Issue 1 , April 2022, , Pages 13-21
Abstract
In the current research, immune system responses against sheep red blood cells (SRBC) and Newcastle disease virus (NDV) in two sexes of both wild and Italian speckled quails were investigated. To compare phenotypic differences of two sexes for humoral immune responses a one-way analysis was applied, ...
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In the current research, immune system responses against sheep red blood cells (SRBC) and Newcastle disease virus (NDV) in two sexes of both wild and Italian speckled quails were investigated. To compare phenotypic differences of two sexes for humoral immune responses a one-way analysis was applied, and a simple animal model using the MCMCglmm package of R software was used for genetic analysis, assuming variance components between the two sexes are different. Phenotypic comparison between males and females did not show a significant difference in any of the strains. In both strains, heritability of humoral immunity in males was higher than females. Results showed, in wild strain, heritability of IgT in males (0.187), and IgY in females (0.177) were higher than other estimates. The highest heritability was related to the NDV, which was estimated to be 0.214 and 0.268 in males and females, respectively. Therefore, genetic selection for IgN can be expected to improve the performance of the birds’ humoral immune system. Likewise, according to the higher estimates of immune responses in males, genetic selection of humoral immune responses for IgN, leads to higher genetic progression.