Effect of Using Reproductive Technologies on Genetic Progress in Sistani Native Cattle of Iran: A Simulation Study

الموضوعات :

ه. فرجی-آروق ¹ (Research Center of Special Domestic Animals, University of Zabol, Zabol, Iran)
م. رکوعی ² (Department of Animal Science and Bioinformatics, Faculty of Agriculture, University of Zabol, Zabol, Iran)
ع. مقصودی ³ (Department of Animal Science and Bioinformatics, Faculty of Agriculture, University of Zabol, Zabol, Iran)
م. مهری ⁴ (Department of Animal Science, Faculty of Agriculture, University of Zabol, Zabol, Iran)
س. انصاری مهیاری ⁵ (Department of Animal Science, College of Agriculture, Isfahan University of Technology, Isfahan, Iran)
ا. کریستین سورنسن ⁶ (Department of Molecular Biology and Genetics, Center for Quantitative Genetics and Genomics, Blichers Allé 208830, Tjele, Denmark)

تاريخ الإرسال : 29 الثلاثاء , ربيع الثاني, 1439 تاريخ التأكيد : 18 الثلاثاء , ذو القعدة, 1439 تاريخ الإصدار : 24 الجمعة , جمادى الثانية, 1440

الکلمات المفتاحية: artificial insemination, embryo transfer, random mating, Sistani cattle,

ملخص المقالة :

The effect of artificial insemination (AI), embryo transfer (ET) to bull dams (BD), and sexed semen (SS) to cow dams (CD) with and without controlling inbreeding were studied using stochastic simulation. Three levels of embryo transfer (no ET, ET on all BD, and ET on 20% of BD), five levels of sexed semen (no SS: control, SS-X on all CD, SS-X on 20% CD, SS-Y on all CD, and SS-Y on 20% CD), three levels of artificial insemination (no AI, AI on 50% cows, and AI on 90% cows), two levels of mating system (random and minimum consistory) were combined together to make 66 scenarios in which the combination of no ET, no SS, and no AI are assigned as a control. The simulated population consisted of 40 herds with 50 cows each was monitored for 30 years. The results showed that the use of AI, ET, and SS techniques increased the annual change of total merit index (TMI), inbreeding, and selection accuracy. Compared to control, the rate of annual change in TMI and inbreeding were increased as 41.95, 36.91 and 83.91%; and 192, 57 and 207%, for using of AI, ET and combination of SS + AI + ET, respectively. The minimum consistory mating decreased inbreeding, but not affected other parameters. The results suggested that using of ET on 20% BD, SS-Y for all CD, and 90% AI alone or in combination with each other along with minimum consistory mating might resulted in high genetic progress and low inbreeding rate. These technologies and inbreeding control strategies may increase the ratio of annual change of TMI to inbreeding.

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