Effects of Non-Genetic Factors and Permanent Maternal Environment on Biometric Traits in Moghani Sheep

محورهای موضوعی : Camel

س. بخشعلی زاده ¹ , م. غفاری ² , ع. هاشمی ³ , ش. جعفری ⁴

1 - Department of Animal Science, Faculty of Agriculture, Urmia University, Urmia, Iran
2 - Department of Animal Science, Faculty of Agriculture, Urmia University, Urmia, Iran
3 - Department of Animal Science, Faculty of Agriculture, Urmia University, Urmia, Iran
4 - Young Researchers and Elite Club, Maku Branch, Islamic Azad University, Maku, Iran

تاریخ دریافت : 1394/06/02 تاریخ پذیرش : 1394/11/11 تاریخ انتشار : 1395/06/11

کلید واژه: Moghani sheep, biometric traits, non-genetic parameters,

چکیده مقاله :

The present study investigated basic statistics for biometric traits as well as non-genetic factors that may affect these traits in the Moghani breed of sheep. The data-set was computed by using biometric records of the Moghani sheep breeding and raising station over a period of 15 years (1996 to 2012). Year of birth, month of birth, birth type and lamb's sex and dam permanent environment were considered as the non-genetic factors. The studied biometric traits were: height at withers (HW), height at rump (HR), body length (BL), heart girth (HG) and leg circumference (LC). Least square means (cm) ± standard error were 69.8 ± 4.1, 69.7 ± 4.2, 50.2 ± 4.6, 85.9 ± 8.2 and 29.0 ± 5.4 for HW, HR, BL, HG and LC, respectively. All traits were affected significantly (P<0.05) by the fixed effect of year of birth. The lamb's sex had a significant effect (P<0.001) on the investigated traits except HG. The traits were affected significantly (P<0.001) by the birth type and month of birth. The maternal permanent environment as a non-genetic factor had no significant effect on the traits under study. The results of the present study suggested that non-genetic factors can be considered as notable sources of variation in the biometric traits. Therefore, improving environmental conditions can be suggested if an improvement in the biometric traits of Moghani sheep is desired.

چکیده انگلیسی:

تحقیق حاضرآمار توصیفی صفات بیومتریک و عوامل غیر ژنتیکی مؤثر در تغییرات این صفات در گوسفندان مغانی را مورد مطالعه قرار داده است. مجموعه داده‌ مورد استفاده از رکوردهای بیومتریک ایستگاه پرورش و اصلاح نژاد گوسفند مغانی در یک دوره 15 ساله (1375 تا 1390) استخراج شد. سال تولد، ماه تولد، نوع تولد و جنس بره و محیط دائمی مادری به عنوان پارامترهای غیر ژنتیکی در نظر گرفته شدند. صفات بیومتریک مورد مطالعه عبارت بودند از: ارتفاع از جدوگاه (HW)، ارتفاع از کپل (HR)، طول بدن (BL)، دور سینه (HG) و دور ران (LC). میانگین حداقل مربعات (سانتیمتر) ± خطای اشتباه برای صفات ارتفاع از جدوگاه، ارتفاع از کپل، طول بدن، دور سینه و دور ران به ترتیب 1/4 ± 8/69، 2/4 ± 7/69، 6/4 ± 2/50، 2/8 ± 9/85 و 4/5 ± 0/29 بود. تمامی صفات به طور معنی‌داری تحت تأثیر اثرات ثابت سال تولد قرار گرفتند (05/0P<). جنس بره اثرات معنی‌داری بروی تمام صفات مورد مطالعه به جزء دور سینه داشت (001/0P<). تمامی صفات مورد مطالعه بطور معنی داری (001/0P<) تحت تأثیر نوع تولد و ماه تولد قرار گرفتند. محیط دائمی مادری به عنوان عامل غیر ژنتیکی اثر معنی‌داری بر روی صفات مورد مطالعه نداشت. نتایج حاصل از مطالعه‌ حاضر نشان داد که عوامل غیر ژنتیکی می‌توانند به عنوان یک منبع تغییر قابل توجه بر روی صفات بیومتریک در نظر گرفته شوند. بنابراین بهبود شرایط محیطی می‌تواند به عنوان عاملی در جهت بهبود صفات بیومتریک در گوسفند مغانی پیشنهاد شود.

منابع و مأخذ:

Abbasi M.A. and Ghafouri-Kesbi F. (2011). Geneticco (variance) components for body weight and body measurementsin Makuie sheep. Asian-Australas J. Anim. Sci. 24, 739-743.

Abegaz S., Van Wyk J.b. and Olivier J.J. (2005). Model comparisons and genetic and environmental parameter estimates of growth and the Kleiber ratio in Horro sheep. South African J. Anim. Sci. 35, 30-40.

Aghaali-Gamasaee V., Hafezian S.H., Ahmadi A., Baneh H., Farhadi A. and Mohamadi A. (2010). Estimation of genetic parameters for body weight at different ages in Mehraban sheep. African J. Biotechnol. 9(32), 5218-5223.

Akaike H. (1974). A new look at the statistical model identification. IEEE Trans. Autom. Control. 19, 716-723.

Akbarinejad V., Kazempoor R., Shojaei M., Rezaee M. and Oji R. (2014). Atlas of Iranian Sheep Breeds. Noorbakhsh Press, Tehran, Iran.

Alphonsus C., Finangwal H.I., Yashim S.M., Agubosi O.C.P. and Sam I.M. (2010). Effect of dam parity on measures of growth in red sokoto goats 1, 3, 6 and month of age. Cont. J. Anim. Vet. Res. 2, 9-13.

Cam M.A., Olfaz M. andSoydan E. (2010). Body measurements reflect body weights and carcass yield in Karayaka sheep. Asian J. Anim. Vet. Adv. 5(2), 120-127.

Dixit S.P., Dhilon J.S. and Sing G. (2001). Genetic and non-genetic parameter estimates for growth traits of Bharat Merino lambs. Small Rumin. Res. 42, 101-104.

Gowane G.R., Chopra A., Prince L.L.L., Mishra A.K. and Arora A.L. (2011). Genetic analysis for growth traits of prolific Garole × Malpura (GM) sheep. Trop. Anim. Health Prod. 43, 299-303.

Jafari S. and Hashemi A. (2014). Estimation of genetic parameters for body measurements and their association with yearling liveweight in the Makuie sheep breed. South African J. Anim. Sci. 44(2), 140-147.

Jafari S., Hashemi A., Darvishzadeh R. and Manafiazar G. (2014). Genetic parameters of live body weight, body measurements, greasy fleece weight, and reproduction traits in Makuie sheep breed. Spanish J. Agric. Res. 12(3), 653-663.

Mandal A., Dass G., Rout P.K. and Roy R. (2010). Genetic parameters for direct and maternal effects on post-weaning body measurements of Muzaffarnagari sheep in India. Trop. Anim. Health Prod. 10, 9752-9756.

Matika O., Van Wyk J.B., Erasmus G.J. and Baker R.L. (2003). Genetic parameter estimates in Sabi sheep. Livest. Prod. Sci. 79, 17-28.

Meyer K. (2007). WOMBAT-a tool for mixed model analysis in quantitative genetics by restricted maximum likelihood (REML). J. Zhejiang Univ. Sci. B. 8(11), 815-821.

Petrovic M.P., Caro Petrovic V., Ruzic-Muslic D., Ilic Z., Spasic Z., Stojkovic J. and Milenkovic M. (2012).Genetic and phenotypic aspects of the body measured traits in Merinolandschaf breed of sheep. Biotechnol. Anim. Husb. 28(4), 733-741.

Petrovic M.P., Ruzic-Muslic D., Maksimovic N. and Memisi N. (2009). Effect of environmental and paragenetic factors on birth mass variability of MIS sheep populations. Biotechnol. Anim. Husb. 25(3), 213-219.

Rahimi S.M., Rafat S.A. and Jafari S. (2014). Effects of environmental factors on growth traits in Makuie sheep. Biotechnol. Anim. Husb. 30(2), 185-192.

Rashidi A., Mokhtari M.S., Safari Jahanshahi A. and Abdi M.R. (2008). Estimation genetic parameters for pre-weaning growth traits in Kermani sheep. Small Rumin. Res. 74, 165-171.

SAS Institute. (2005). SAS^®/STAT Software, Release 6. SAS Institute, Inc., Cary, NC. USA.