The Effects of Crossbreeding on Meat Fatty Acids Profile in Qazvinian Native Goats
محورهای موضوعی : Camel
م.ح. هادی-تواتری
1
,
ا. رشیدی
2
,
ح. جهانی-عزیزآبادی
3
,
م. رزم‌کبیر
4
1 - Department of Animal Science, Faculty of Agriculture, University of Kurdistan, Sanandaj, Iran
2 - گروه علوم دامی، دانشکده کشاورزی، دانشگاه کردستان، سنندج، ایران
3 - Department of Animal Science, Faculty of Agriculture, University of Kurdistan, Sanandaj, Iran
4 - Department of Animal Science, Faculty of Agriculture, University of Kurdistan, Sanandaj, Iran
کلید واژه: crossbreeding, Fatty acids profile, meat, Qazvinian goat, Saanen goat,
چکیده مقاله :
The study was conducted to investigate the fatty acid profile of intramuscular fat in longissimus lumborum (LL) of three genotypic groups: Qazvinian native (Q, n=10), crossbred Qazvinian native × Saanen breed (QS, n=10) and backcrossed Qazvinian native × Saanen breed (QSS, n=9) male kids.All of kids were weaned at 75-days-old and then fed with a diet consisted of concentrate (70%) and alfalfa hay (30%). The kids were slaughtered with an average age of 130 days and immediately samples of LL muscle were collected. Data were analyzed through one-way ANOVA using the generalized linear model (GLM) procedure. The total differences among genotypic groups were evaluated by a canonical discriminant analysis (CDA).The concentration of intramuscular fat (g/100g meat, Q=0.94, QS=2.01 and QSS=1.05) and saturated fatty acids (SFA; Q=40.87, QS=43.25 and QSS=36.9), polyunsaturated fatty acids (PUFA; Q=12.99, QS=13.89 and QSS=22.41), total conjugated linoleic acids (CLA, Q=2.1, QS=2.32 and QSS=1.02) and desirable fatty acids (Q=73.63, QS=67.18 and QSS=74.87) as g/100 g total fatty acids between genotypic groups were significant (p <0.05). Furthermore, the PUFA:SFA and linoleic (C18:2 n-6):alpha-linolenic acids (C18:3 n-3) ratio in genotypic groups were significant (p <0.05). The genotypic groups were separated by CDA, based on their meat fatty acids profile. Results demonstrated that crossbreeding could significantly change the intramuscular fatty acids profile. Therefore, it can be concluded that the fatty acids profile in crossbred kids are better than that of native Qazvinian kids. In these experimental conditions, results of the present study demonstrated that crossbreeding could be a suitable strategy for producing meat with higher concentration of unsaturated fatty acids with beneficial properties for health of consumers.
در این مطالعه پروفایل اسیدهای چرب ماهیچه longissimus lumborum (LL) بزغاله‌های نر سه گروه ژنوتیپی بزهای بومی استان قزوین (Q، 10=n)، آمیخته‌های بومی قزوین× سانن (QS، 10=n) و (بومی قزوین×سانن)×سانن (QSS، 9=n) مورد بررسی قرار گرفت. همه بزغاله‌ها در سن 75 روزگی از شیر گرفته شده بودند و با جیره‌ای حاوی 30 درصد یونجه و 75 درصد کنسانتره تغذیه شدند. بزغاله‌ها در سن 130 روزگی ذبح شده و بلافاصله از ماهیچه LL آنها نمونه‌‌ها جمع‌آوری گردید. داده‌ها با استفاده از تجزیه واریانس یک‌طرفه و روش GLM آنالیز شد. مجموع تغییرات پروفایل اسیدهای چرب گروه‌های ژنتیکی از طریق تجزیه تشخیص کانونی (CDA) مورد تجزیه و تحلیل قرار گرفت. تفاوت میانگین چربی درون ماهیچه‌ای (0.94=Q، QS=2.01 و 1.05=QSS، گرم در 100 گرم گوشت)، اسیدهای چرب اشباع (SFA، Q=40.78، QS=25.43 و 36.9=QSS)، اسیدهای چرب غیر اشباع با چندین باند مضاعف (PUFA، 99/12=Q، 89/13=QS و 41/22=QSS)، کل اسید لینولئیک مزدوج (CLA، Q=10.2، QS=2.32 و 1.02=QSS) و اسیدهای چرب مفید (73.63=Q، 67.18=QS و 74.87=QSS) معنی‌دار بود (0.05>P). همچنین نسبت‌های PUFA:SFA و C18:2,n-6:C18:2,n-3 درگروه‌های ژنتیکی معنی‌دار بود (0.05>P). گروه‌های ژنتیکی توسط روش CDA و بر اساس کل اسیدهای چرب موجود در چربی داخل ماهیچه LL در دسته بندی‌های متفاوت قرار گرفتند. نتایج حاصل نشان داد که آمیخته‌گری دارای اثر معنی‌دار (0.05>P) بر تغییرات پروفایل اسیدهای چرب ماهیچه LL بزغاله‌ها بود و پروفایل اسیدهای چرب ماهیچه LL بزغاله‌های آمیخته نسبت به بزغاله‌های بومی استان قزوین کیفیت بهتری داشت. بر اساس شرایط این آزمایش آمیخته‌گری می‌تواند استراتژی مناسبی برای تولید گوشت بز با غلظت بالایی از اسیدهای چرب غیر اشباع با جنبه‌های مفید برای سلامتی مصرف‌کننده باشد.
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