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تاثیر جنس گوساله روی صفات تولیدی و عملکردی گاوهای هلشتاین در استان اصفهان | ||
علوم دامی ایران | ||
دوره 54، شماره 2، تیر 1402، صفحه 129-137 اصل مقاله (1.11 M) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22059/ijas.2022.335710.653863 | ||
نویسنده | ||
ربیع رهبر* | ||
گروه کشاورزی، دانشگاه پیام نور، تهران، ایران. | ||
چکیده | ||
سود اقتصادی واحدهای پرورش گاو شیری تابعی از حجم تولید شیر، بازده تولیدمثلی و سلامت گله است که عوامل محیطی و فیزیولوژی مختلفی از جمله تغذیه، نوبتزایش و جنس نتاج میتوانند روی میزان بروز این صفات نقش داشتهباشند. هدف اصلی این پژوهش بررسی اثر جنس گوساله بر صفات تولیدی، تولیدمثلی و سلامت پستان گاوهای هلشتاین استان اصفهان بود. اطلاعات شامل 37038 راس گاو هلشتاین مربوط به دوره اول تا پنجم شیردهی از 13 گله صنعتی در طی سالهای 1384 تا 1396 بود. برای بررسی اثر جنس گوساله بر صفات تولیدی و سلامت، از رویه مدل خطی مختلط و بر صفات تولیدمثلی از رویه GLIMMIX نرم افزار SAS9.4 استفاده شد. نتایج نشان داد، گاوهای با گوساله ماده مقدار شیر 305 روز بیشتری (7/90 کیلوگرم) در مقایسه با گاوهای با گوساله نر داشتند (01/0P<). برای صفات درصد چربی و پروتئین شیر 305 روز و فاصله زایش تا اولین تلقیح، اثر تفاوت جنس گوساله کم اما معنی-دار بود (05/0P<). درحالیکه برای سایر صفات، بین زایش گوسالههای نر و ماده تفاوت معنیداری مشاهده نشد. باتوجه به نتایج حاصل، درنظرگرفتن اثر جنس گوساله در ارزیابی ژنتیکی گاوهای هلشتاین و همچنین تحلیل هزینه-فایده میزان استفاده از اسپرمهای تعیین جنسیت شده در گلهها بهویژه برای صفت تولید شیر، ضروری بهنظر میرسد. | ||
کلیدواژهها | ||
اسپرم تعیین جنسیت شده؛ فاصله گوسالهزایی؛ تولید شیر؛ صفات تولیدمثلی؛ صفات عملکردی | ||
عنوان مقاله [English] | ||
Effect of Calf Sex on the Production and Performance Traits of Holstein Cows in Isfahan Province | ||
نویسندگان [English] | ||
Rabie Rahbar | ||
Department of Agriculture, Payame Noor University (PNU), Tehran, Iran. | ||
چکیده [English] | ||
The economic benefit of dairy cattle breeding units is a function of milk production volume, reproductive efficiency and herd health that various environmental and physiological factors such as nutrition, parity and offspring sex can play a role in the incidence of these traits. the main aim of this study was to investigate the effect of calf sex on production, reproductive and udder health traits in Isfahan Holstein cows. The data included 37,038 Holstein cows from the first to fifth lactation period from 13 industrial herds during the years 2005 to 2017. To investigate the effect of calf sex on the production and health traits, the mixed linear model procedure and on the reproduction traits, GLIMMIX procedure of SAS9.4 software were used. The results showed that cows with female calf had higher 305-days of milk (90.7 kg) in compared to cows with male calf (P<0.01). For percentage of 305-d fat and protein and the number of days from calving to first service, the effect of calf sex different was low but significant (P<0.05). However, no significant difference was observed between male and female calves for other traits. According to the results, it seems necessary to consider the effect of calf sex in the genetic evaluation of Isfahan Holstein cows and also cost-benefit analysis of the use of sexed semen in herds. | ||
کلیدواژهها [English] | ||
sexed semen, calving interval, milk production, reproductive traits, productive life | ||
مراجع | ||
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