Potential of Genomic Breeding Program in Iranian Native Chickens

محورهای موضوعی : Camel

س. ابراهیم‏پورطاهر ¹ , ص. علیجانی ² , س.ع. رأفت ³ , ا.ر. شریفی ⁴

1 - Department of Animal Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
2 - Department of Animal Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
3 - Department of Animal Science, Faculty of Agriculture, University of Tabriz, Tabriz, Iran
4 - Department of Animal Science, Faculty of Agriculture, University of Göttingen, Göttingen, Germany

تاریخ دریافت : 1396/07/05 تاریخ پذیرش : 1396/11/26 تاریخ انتشار : 1397/06/10

کلید واژه: simulation, genetic gain, genomic selection, economic profit,

چکیده مقاله :

Development of genomic selection can be a new strategy in breeding of native chicken. The main aim of this study was to evaluate application of a genomic selection program in Iranian native chickens from economic and genetic points of view. In this study, two scenarios including conventional scenario with 3360 and 3380 animals and genomic scenario were compared using ZPLAN+ software. The traits in the selection index were egg number, body weight, mean weight of egg and age at sexual maturity. In genomic scenario different reference population size were considered. In this scenario the genomic information from cocks (800 cocks were genotyped) was added to available information in conventional scenario based on selection index method. The generation interval was 14.5 months for all conventional and genomic scenarios. In comparison of scenarios, genetic gain and the economic profit increased by increasing reference population size in genomic scenario (€126.88-€147.45 with 80 cocks) and (€140.20 to €160.77 with 60 cocks) per animal unit. The reliability of selection index was 0.33 for cocks in conventional scenario. The reliabilities of genomic scenarios were 0.61-0.84 for 80 selected cocks and 0.66-0.87 for 60 selected cocks and that were high in comparison to conventional scenario. This study showed that genomic selection can increase the genetic improvement rate of native chickens. However, the costs of genomic scenarios were higher than conventional scenario, but genomic information increased accuracy of selection and genetic gain in breeding goals traits.

چکیده انگلیسی:

گله­های بومی در کشورهای کم درآمد و در حال توسعه همچون ایران، نقش مهمی ایفا می‏کنند. توسعه انتخاب ژنومی می‏تواند یک استراتژی جدید در اصلاح نژاد مرغان بومی باشد. هدف از این مطالعه بررسی کاربرد برنامه انتخاب ژنومی در مرغان بومی ایران از لحاظ اقتصادی و از دیدگاه ژنتیکی بود. در این مطالعه دو سناریو شامل سناریوی مرسوم با 3360 و 3380 حیوان با یک سناریوی ژنومی با استفاده از نرم‏افزار ZPLAN+ مقایسه شد. صفات موجود در شاخص انتخاب، تعداد تخم‏ مرغ، وزن بدن، متوسط وزن تخم ‏مرغ و سن بلوغ جنسی بود. در سناریوی ژنومی اندازه جمعیت مرجع متفاوت مد نظر بودند. در این سناریو اطلاعات ژنومی خروس‏ها (800 خروس تعیین ژنوتیپ شده بود) به اطلاعات موجود در سناریوی مرسوم بر پایه متد شاخص انتخاب اضافه شدند. فاصله بین‏نسلی در همه سناریوهای مرسوم و ژنومی 5/14 ماه بود. در مقایسه سناریوها، رشد ژنتیکی و سود اقتصادی در سناریوی ژنومی با افزایش اندازه جمعیت مرجع افزایش یافت (88/126 یورو تا 45/147 یورو با 80 خروس) و (20/140 یورو تا 77/160 یورو با 60 خروس) در هر واحد حیوانی. قابلیت اعتماد شاخص انتخاب در سناریوی مرسوم در مسیر خروس‏ها 33/0 بود. قابلیت اعتماد در سناریو ژنومی با 80 خروس انتخابی برابر 61/0 تا 84/0 و در سناریوی ژنومی با 60 خروس انتخابی 66/0 تا 87/0 بود و در مقایسه با سناریوی مرسوم بالاتر بود. این مطالعه نشان داد که انتخاب ژنومی می‏تواند نرخ پیشرفت ژنتیکی را در مرغان بومی افزایش دهد. در حالیکه هزینه‏های سناریوهای ژنومی از سناریوی مرسوم بالاتر بود اما اطلاعات ژنومی دقت و رشد ژنتیکی را در صفات هدف اصلاحی افزایش داد.

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