crossbred

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1 - بررسی بیان ژن های مرتبط با تنش در گوسفندان آمیخته و بومی DOR: 20.1001.1.17359880.1400.14.3.5.6
ندا روح بخش نعمت هدایت ایوریق رضا سید شریفی میرداریوش شکوری

زمینه و هدف: افزایش دمای هوا و خشک شدن مراتع حیوانات را دچار تنش آبی و تغذیه ای می کند. در این پژوهش ژن‌های کنترل کننده مقاومت در گوسفندان دورگ و بومی مورد بررسی قرارگرفت.روش کار: در این تحقیق از ده بره‌ ی نر آمیخته رومانف و بومی و ده بره نر خالص بومی در 4 تیمار و 5 تکر أکثر

زمینه و هدف: افزایش دمای هوا و خشک شدن مراتع حیوانات را دچار تنش آبی و تغذیه ای می کند. در این پژوهش ژن‌های کنترل کننده مقاومت در گوسفندان دورگ و بومی مورد بررسی قرارگرفت.روش کار: در این تحقیق از ده بره‌ ی نر آمیخته رومانف و بومی و ده بره نر خالص بومی در 4 تیمار و 5 تکرار در هر گروه استفاده شدکه در دوگروه با محدودیت آبی و بدون محدودیت آبی تقسیم شدند در پایان آزمایش نمونه‌ها ی بافت کبد از حیوانات کشتار شده جمع آوری و بعد از استخراج RNA و پاکسازی نمونه ها انجام واکنش Real Time PCR توالی و طول قطعه های مورد نظر بررسی قرار گرفت و برای آنالیز آماری از روش آنالیز فاکتوریل 2×2 در قالب طرح کاملاً تصادفی با استفاده از نرم افزار آماری SAS استفاده گردید.یافته ها: با استخراج ژن ها مشخص گردید میزان بیان ژن های، NRT2, PRKAA1, SIRT3, TFAM,GPX1 در شرایط تنش در گوسفندان بومی نسبت به گوسفندهای آمیخته افزایش داشته است.نتیجه گیری: مطالعات انجام یافته بر روی بیان ژن های، PRKAA1, NRT2,GPX1,TFAM SIRT3در کبد دو گروه گوسفند بومی و دورگ در شرایط تنش و نرمال چنین استنباط شد که در شرایط استرس این چهار گروه ژن با مقابله با اکسیداسیون اکسیداتیو و ذخیره انرژی و جلوگیری از اتلاف انرژی و محافظت از سلول, مقاومت حیوان را در برابر شرایط تنش افزایش می دهند با توجه به سازگاری ژنتیکی گوسفندهای بومی با شرایط بیابانی منطقه, سبب مقاومت بیشتر حیوان در برابر گرما و بیماری می گردد. تفاصيل المقالة

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2 - Reproductive Performance for Holstein Friesian × Arsi and Holstein Friesian × Boran Crossbred Cattle
T. Wassie G. Mekuriaw Z. Mekuriaw

The study was carried out at Agarfa ATVET College dairy farm to evaluate the reproductive performance of Holstein Friesian× Arsi and Holstein Friesian ×Boran cattle. For the study, records compiled from 1983 to 2012 at the Agarfa dairy farm were used as orig أکثر

The study was carried out at Agarfa ATVET College dairy farm to evaluate the reproductive performance of Holstein Friesian× Arsi and Holstein Friesian ×Boran cattle. For the study, records compiled from 1983 to 2012 at the Agarfa dairy farm were used as original data. The effects of breed, bloodlines, season and parity on the reproductive traits were evaluated. Data were analyzed using the general model of the SAS program. The overall mean ± SE of age at first service (AFS), age at first calving (AFC), days open (DO), calving interval (CI), number of service per conception (NSPC), breeding efficiency (BE) and longevity were 32.05 ± 0.57 months, 41.16 ± 0.56 months, 194.62 ± 3.42 days, 475.92 ± 3.44 days, 1.35 ± 0.03 service, 68.67 ± 0.01% and 7.77 ± 0.25 years, respectively. Breed had significant effect (P<0.05) on AFS and AFC. Bloodlines, season and parity had significant effect (P<0.01) on DO and CI. Breed, bloodlines, season and parity had significant effect (P<0.01) on breeding efficiency. Season of insemination significantly affect NSPC (P<0.01). Longevity was only affected by bloodlines.Generally reproductive performances found in this study were lower than the performance reported in many tropical regions. Therefore, due consideration should be given in calf and heifer management, heat detection, accuracy of artificial insemination, feeding and health care. تفاصيل المقالة

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3 - Preliminary Study on Productive and Reproductive Performances of Jamunapari, Black Bengal and Crossbred Goats at Chittagong Region of Bangladesh
ان. بومیک ام.ا م. میا ام.ام. رحمان اس. اسلام

The present study was conducted with a view to know the productive and reproductive performance of Jamunapari, Black Bengal and crossbred goats in Chittagong district during the period of May to December 2012. The data on productive and reproductive traits were collecte أکثر

The present study was conducted with a view to know the productive and reproductive performance of Jamunapari, Black Bengal and crossbred goats in Chittagong district during the period of May to December 2012. The data on productive and reproductive traits were collected from 324 goats as a whole. In the present study, the birth weight of Jamunapari goats was higher than other crosses. The adult weight of Jamunapari, Black Bengal and crossbred bucks and does were 50.70 ± 3.53, 24.27 ± 1.67 and 40.38 ± 2.90 kg and 45.47 ± 3.78, 21.06 ± 2.33 and 35.72 ± 2.97 kg, respectively. The highest milk yield and lactation period were observed in Jamunapari goats than other crosses. The average ageat puberty of Jamunapari, Black Bengal and crossbred goats were 335.00 ± 25.77,194.12 ± 18.73 and 287.50 ± 22.57 days, respectively. Ageat first conceptionof Jamunapari, Black Bengal and crossbred goats were 381.00 ± 22.54, 217.94 ± 16.87 and 321.25 ± 21.25 days,respectively. Ageat first kiddingof Jamunapari, Black Bengal and crossbred goats were 534.00 ± 24.58,368.12 ± 16.96 and 471.25 ± 21.25 days, respectively. The kidding interval of Black Bengal goat was lower i.e. the reproductive performance is better in Black Bengal goat than Jamunapari and crossbred goats.Gestation period of Jamunapari, Black Bengal and crossbred goats were 151.71 ± 8.19, 146.72 ± 7.61 and 147.85 ± 7.74 days, respectively. تفاصيل المقالة

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4 - Evaluation of Functional Properties and Fatty Acid Profiles of One-Hump and Crossbred (<i>Dromedarius and Bactrianus</i>) Camel Meat
ز. عبادی ف. سرحدی

In this study twenty-four male and female one-humped and crossbred (Camelus dromedarius and Camelus bactrianus) camel meat were evaluated during two fattening periods (6 and 9 months). The characteristics of camel meat and fatty acid profile in different parts of body ( أکثر

In this study twenty-four male and female one-humped and crossbred (Camelus dromedarius and Camelus bactrianus) camel meat were evaluated during two fattening periods (6 and 9 months). The characteristics of camel meat and fatty acid profile in different parts of body (leg, shoulder, loin and neck) were measured. The results indicated that the pH ultimate of crossbred camel meat was lower than one-humped sample and the males had higher level than the females (P<0.05). The genetic groups of crossbred and one-humped had significantly different percentage of cooking loss, water binding capacity (WBC) and meat pigment concentrations. The fatty acid (FA) composition of camel meat was affected by crossbreeding and fattening periods especially in neck, loin and shoulder cuts. High level of unsaturated FA percentage and the ratio of mono and polyunsaturated FA (MUFA+PUFA) to saturated FA (SFA) were found in crossbred meat samples. Fattening period from 6 to 9 months increased the level of MUFA + PUFA/SFA ratio and health index of crossbred camel meat. تفاصيل المقالة

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5 - Productive and Reproductive Potentialities of Different Genetic Groups of Crossbred Cows Reared under Different Farming Conditions
جی. میاه م.اس.اچ. سهل م.آی. حسین م. شهجلال م.اس. حسین م.آ. حسین ک.ن. اسلام

A cross-sectional comparative study was carried out to investigate the productive and reproductive performances of different genetic groups of crossbred cows at three different farming conditions in Bangladesh. Crossbred cows (n=90) those already completed third lactati أکثر

A cross-sectional comparative study was carried out to investigate the productive and reproductive performances of different genetic groups of crossbred cows at three different farming conditions in Bangladesh. Crossbred cows (n=90) those already completed third lactations, were selected randomly from three different dairy farms (e.g. Jarip, Mullah and Nahar) located in Chittagong, Bangladesh. The numbers of animals of each of the genetic groups were 30 for 50% Holstein Friesian (HF) × 50% Sahiwal (SL) cross, 30 for 62.5% HF × 37.5% SL cross and 30 for 75% HF × 25% SL cross. Different productive and reproductive traits of crossbred cows such as age at first heat, calving interval, gestation length, service per conception, days open, lactation length and milk yield, etc., were measured in this study. Results demonstrated that gestation length of 50% HF × 50% SL, lactation length of 62.5% HF × 37.5% SL, gestation and lactation length of 75% HF × 25% SL crossbred cows between the farms were significantly influenced (P<0.05). Other parameters of crossbred cows such as age at first heat, age at first calving, service per conception, average daily milk yield, days open and calving interval of different genotypes were not influenced (P>0.05) by different farms. The highest (282.00±0.00 days) and lowest (276.43±0.92 days) gestation length were found in crossbred cows of the Jarip and Nahar dairy farm, respectively. The highest (297.50±3.50 days) and lowest (282.00±0.00 days) gestation length were found in crossbred cows of Mullah and the Jarip dairy farm, respectively. The overall productive and reproductive performance of different crossbred cows of the Nahar and Mulla dairy farm were superior to that of the Jarip dairy farm. تفاصيل المقالة

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6 - Oestrus Duration and Status of Reproductive Organs in Repeat Breeding Cows
F.A. Bhat H.K. Bhattacharyya

The present study was conducted to see the effect of non-specific genital infections and ovulatory disturbances on clinical signs of oestrusnamely oestrus duration, tonicity of uterus, relaxation of cervix and persistence of follicle. The mean values of oestrus duration أکثر

The present study was conducted to see the effect of non-specific genital infections and ovulatory disturbances on clinical signs of oestrusnamely oestrus duration, tonicity of uterus, relaxation of cervix and persistence of follicle. The mean values of oestrus duration, tonicity of uterus and relaxation of cervix varied significantly (P<0.05) amongthe group of impaired ovulation (anovulation and delayed ovulation) and normal ovulation. Following the onset of oestrus, follicle was palpated up to144 hrs in all anovulation animals, 72.00±4.17 hrs in case of delayed ovulation, 36.89±0.62 hrs in case of normal ovulation with infection and 36.71±1.61 hrs in the control group (normal ovulation without infection).The study revealed that oestrus duration and status of reproductive organs are important criteria in the diagnosis of ovulatory disturbances in repeat breeding cattle. تفاصيل المقالة

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7 - Influence of Body Condition Score on Yield and Composition of Milk in Crossbred Dairy Cows
م.ای. حسین تی. چندا جی.کا. دبناث م.م. حسن آ.اچ. شایکات م.آ. هکو

The study was carried out for a period of 150 days on 120 Holstein Friesian crossbred dairy cows between mid to late lactation to quantify the influence of body condition score (BCS) on yield and composition of milk. Total 12 dairy farms having same housing systems and أکثر

The study was carried out for a period of 150 days on 120 Holstein Friesian crossbred dairy cows between mid to late lactation to quantify the influence of body condition score (BCS) on yield and composition of milk. Total 12 dairy farms having same housing systems and holding at least 20 crossbred dairy cows per farm between mid to late lactation were selected for this study purposes. BCS of individual cows was recorded in a 1-5 scale. Milk samples were collected from individual cow. Samples collected from cows having same BCS were mixed together to make composite sample. Chemical analyses of the samples were carried out in triplicate for fat, protein, lactose, ash, total solids (TS) and solids not fat (SNF). Results indicated that, BCS significantly (P<0.05) affected milk yield, milk fat and ash content in crossbred Holstein Friesian dairy cows. Highest milk yield (13.45±1.80 kg/day) was recorded with moderate BCS (3.00) followed by lower (2.75 to 2.25) and higher (3.25 to 4.00). Milk protein, lactose, TS, SNF and specific gravity (SG) increased non significantly (P>0.05) with increasing BCS up to 4.0. Correlation coefficient matrix indicated that BCS was negatively correlated with milk yield. However, there was a positive relationship of BCS with milk protein, lactose, TS, SNF and SG even though the strength of association was variable. تفاصيل المقالة

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8 - Photoperiod as a Factor for Studying Fluctuations ofSeminal Traits during Breeding and Non-BreedingSeason
M.M. Pourseif G.H. Moghaddam S.A. Rafat H. Daghighkia A. Pourseif

The main purpose of this study was to evaluate the influence of the photoperiod on the seminal traits of crossbreed wool-producing rams throughout on year period. For the effect of photoperiod two periods were considered: decreasing daylight length (summer and autumn) a أکثر

The main purpose of this study was to evaluate the influence of the photoperiod on the seminal traits of crossbreed wool-producing rams throughout on year period. For the effect of photoperiod two periods were considered: decreasing daylight length (summer and autumn) and increasing daylight length (winter and spring). For the study 5 Baluchi × Moghani (BL×MG) and 5 Arkharmerino × Moghani (AM×MG) rams were used. Semen collection started from first of October 2010 to end of September 2011. After a training period of 2 weeks semen ejaculates were evaluated for volume, total sperm count per ejaculate (TSE), spermatozoa concentration, semen color, wave motion, percentage of progressive motility, percentage of live and abnormal spermatozoa, semen pH, methylene blue reduction time (MBRT) and semen index (semen volume × spermatozoa concentration/mL × live spermatozoa % × progressive motility %).Analysis of the yearlong data showed that semen samples with the best quality were collected in September to November (P<0.05). Significant seasonal variations of semen traitswere observed for all of seminal traitsexcept for progressive motility, percentage of live spermatozoa and MBRT. Yet, nostatistical differences were found between the two genetic groups (P>0.05). Although there were significant seasonal changes in semen characteristics of the crosses, the fresh semen showed adequate quality to be used for artificial or natural insemination all around the year. Photoperiod was found to influence semen production in two genetic groups at 38 ˚02' N, 46 ˚27' E at an altitude of 1567 m above sea level of Iran. However, these effects should are not detrimental to the use of rams for breeding purposes throughout the year. تفاصيل المقالة

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9 - Measuring of Udder Morphological Characteristics among Crossbred and Pure Sheep Breeds
س. صادقی س. ع. رافت غ. مقدم ح. جانمحمدی

Image processing technique was used to compare udder morphological characteristics in two Iranian crossbred sheep populations including Ghezel-Arkhamerino, Moghani-Arkharmerino and a pure one that was Ghezel ewes. In addition, the resulted measurements were applied as i أکثر

Image processing technique was used to compare udder morphological characteristics in two Iranian crossbred sheep populations including Ghezel-Arkhamerino, Moghani-Arkharmerino and a pure one that was Ghezel ewes. In addition, the resulted measurements were applied as independent variables for estimation of daily milk yield by regression models. Udder height of Ghezel was higher than Ghezel-Arkhamerino and Moghani-Arkharmerino. The udder left and right cistern height were imbalanced for Moghani-Arkharmerino crossbreds than for other populations. The teat opening, attachment width, direction of the right teat and teat-udder back distance for Ghezel ewes appeared to be the most useful traits among the udder traits taken in this study for predicting daily milk yield. The results reveals that digital image processing may be used as an alternative biometric characterization tool that would provide more accurate observation and measurements on domestic animals than current ones. تفاصيل المقالة

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10 - Study of Reproductive Performance of Crossbred Ewes Treated with GnRH and PMSG during Breeding Season
G.H. Moghaddam A. Olfati H. Daghigh Kia S.A. Rafat

Reproductive performance was evaluated in non-lactating crossbred ewes to which were administered the exogenous GnRH and PMSG. The ewes were randomly allocated in three treatment groups (n=40).After accurate detection of estrus and 2 hours prior to mating, 2.5 mL of dis أکثر

Reproductive performance was evaluated in non-lactating crossbred ewes to which were administered the exogenous GnRH and PMSG. The ewes were randomly allocated in three treatment groups (n=40).After accurate detection of estrus and 2 hours prior to mating, 2.5 mL of distilled water and 2.5 mL of GnRH were injected intramuscular to each ewe of the first (control) and second group, respectively. In the third group, the ewes were pretreated with CIDR for 14 days and received 400 IU PMSGat the time of withdrawal of the CIDR. After injection of PMSG, fixed-time artificial insemination was performed with 0.5 mL of fresh diluted semen. No significant differences were observed in term of the pregnancy, lambing, and fecundity rates between ewes treated with GnRH and control group (87.5, 97.5, and 1.114% vs. 75, 82.5, and 1.1%, respectively). Twining rate was higher in the ewes treated with GnRH than synchrony or control groups (18.18, 4, and 6.5%respectively, P<0.05). In the artificially inseminated group, pregnancy, lambing and fecundity rates were 77.5, 62.5, and 0.81%, respectively. In conclusion, the results showed that treatment of ewes with GnRH at time of estrus and prior to mating, improved the conception and twining birth rates. Also injection of PMSG after CIDR removal caused an increase in efficiency of fertility rate and shorter breeding period. تفاصيل المقالة

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11 - Effect of Flushed Feeding and Age on Estrus Synchronization and Conception Rate of Holstein × Local Crossbred Cows After Using Analogue GnRH and Prostaglandin F2α Hormone
M. Sydur Rahman M. Kabirul Islam Khan T. Bilkis

The study was conducted to know the effect of flushed feeding on estrus synchronization and conception rate of Holstein ÍLocal crossbred cow’s after using the GnRH (fertagyl) and PGF2α hormone. As a representative sample 20 Holstein ÍLocal cros أکثر

The study was conducted to know the effect of flushed feeding on estrus synchronization and conception rate of Holstein ÍLocal crossbred cow’s after using the GnRH (fertagyl) and PGF2α hormone. As a representative sample 20 Holstein ÍLocal crossbred cows were chosen from Chittagong Cantonment Military Dairy Farm in Bangladesh and the experimental work was carried out for 60 days. Ten cows were flushed with high energy feed (10.5 mega Joule metabolisable energy/kg feed dry matter) and considered as treated group and 10 cows was allowed for normal feeding. Both the control and treated group cows were injected intramuscularly by the GnRH and PGF2α hormone. After injection of these hormones, 100% cows from both groups showed estrus. Fixed time artificial insemination (AI) was done and the cows were diagnosed in pregnancy after 60 days of AI. It was observed that 20% cows were conceived after AI from control group, but treated group cows showed more conception / pregnancy rate (40%). After using the hormones, age of the cow did not influences for estrus synchronization, but for conception rate it was observed that younger cows showed more than older one. تفاصيل المقالة

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12 - Influence of Dietary Energy and Protein Intake on Yield and Composition of Milk in Crossbred Dairy Cows
M.E. Hossain T. Chanda G.K. Debnath M.M. Hassan M.A. Haque

The study was carried out on 120 crossbred Holstein × Shahiwal dairy cows for a period of 150 days to quantify the influence of dietary energy and protein intake on yield and composition of milk. Total 12 dairy farms having similar housing systems and holding at l أکثر

The study was carried out on 120 crossbred Holstein × Shahiwal dairy cows for a period of 150 days to quantify the influence of dietary energy and protein intake on yield and composition of milk. Total 12 dairy farms having similar housing systems and holding at least 20 dairy cows in between mid to late lactation were selected for study purposes. The farms were located in the peri-urban and urban areas of Chittagong, Bangladesh. Milk samples were collected from individual cow. Milk from cows having same body condition scoring (BCS) were mixed together to make a composite sample. Chemical analyses of the samples were carried out in triplicate for fat, protein, lactose, total solids (TS), solids not fat (SNF) and ash. Dietary metabolizable energy (ME) and crude protein (CP) intake were measured by analyzing the amount of total mixed ration ingested by the individual cow. Results indicated that, ME intake (MJ/d) significantly (P<0.01) influenced milk yield, milk fat and TS content of milk in crossbred Holstein Friesian dairy cows. Similar to ME, CP intake (g/d) also influenced (P<0.01) milk yield, fat, protein, lactose, TS and ash content of milk. Correlation coefficient matrix indicated that, milk yield was positively correlated with ME and CP intake. However, there was a negative association between ME or CP intake and milk protein, lactose, TS and SNF of milk even though the strength of association was variable. It could therefore be inferred that, adequate dietary ME and CP intake is important to optimize milk yield and milk composition in crossbred Holstein × Shahiwal dairy cows reared under intensive farming systems in tropical regions. تفاصيل المقالة

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13 - Evaluation of Growth Performance of Local and Dorper × Local Crossbred Sheep in Eastern Amhara Region, Ethiopia
M. Lakew M. Haile-Melekot G. Mekuriaw

The present study was performed to evaluate the on-station growth performance of local and Dorper × local crossbred sheep in eastern Amhara region, Ethiopia. Data on 302 lambs collected over a 4-year period (2009 to 2012) on local and Dorper × local crossbre أکثر

The present study was performed to evaluate the on-station growth performance of local and Dorper × local crossbred sheep in eastern Amhara region, Ethiopia. Data on 302 lambs collected over a 4-year period (2009 to 2012) on local and Dorper × local crossbred sheep at Sirinka breeding, evaluation and distribution site were used in this study. Fixed effects considered were breed, lamb sex, birth season, birth type and birth year. Results revealed that breed was a significant source of variation that crossbred lambs consistently weighed more than the local sheep lambs at all ages. The mean birth weights of local and crossbred lambs were 2.36 ± 0.05 and 3.24 ± 0.04 kg, respectively. Sex was an important source of variation at weaning, six months and yearling of ages in which male lambs were superior over their female contemporaries. Lambs born in dry season were heavier than lambs born in wet season at six months (20.51±0.34 kg vs. 16.74±0.59 kg) and at yearling (31.12±0.38 kg vs. 27.72±0.82 kg). Single-born lambs were heavier (P<0.0001) than their multiple-born contemporaries. There was also significant (P<0.0001) difference on average daily gain of lambs between the crossbred (129.97±2.23 g/day) and local sheep (67.78±1.60 g/day) lambs from birth to weaning age. Males had higher pre-weaning average daily gain than females (125.83±3.38 vs. 116.93±3.13 g/day, P<0.05). Single-born lambs grew faster than their multiple contemporaries between birth to 30 days (179.85±3.15 vs. 127.27±6.82 g/day, P<0.0001) and birth to weaning (123.96±2.55 vs. 107.49±5.04 g/day, P<0.0001) of age. The crossbred lambs also gained higher (64.69±1.74 g/day) than the local sheep lambs (37.94±1.19 g/day) after weaning. Breed was found to have significant (P<0.0001) effect on overall growth rate, where crossbred lambs had higher growth rate than the local sheep lambs. There were generally crossbred lambs had better growth performance and higher growth rates than the local sheep lambs. تفاصيل المقالة

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14 - Reproductive Performance Evaluation of Holstein Friesian and Their Crosses with Boran Cattle Breeds in Ardaita Agricultural Technical Vocational Education Training College Dairy Farm, Oromia Region, Ethiopia
د.و. منجیستو ک.آ. وندیمججن م.اچ دمیساش

The study was conducted at Ardaita Agricultural Technical Vocational Education Training (ATVET) college dairy farm, to evaluate the reproductive performance of Holstein Friesian and its crosses with Boran cattle breeds. Data collected between 2000 and 2015 on reproducti أکثر

The study was conducted at Ardaita Agricultural Technical Vocational Education Training (ATVET) college dairy farm, to evaluate the reproductive performance of Holstein Friesian and its crosses with Boran cattle breeds. Data collected between 2000 and 2015 on reproductive traits (n=2632) were studied and analyzed using general linear model procedure. The overall estimated means for age at first service (AFS), age at first calving (AFC), calving interval (CI), days open (DO) and number of services per conception (NSC) were: 31.33 ± 0.44 months, 41.08 ± 0.44 months, 405.50 ± 3.32 days, 134.84 ± 3.51 days and 1.36 ± 0.03, respectively. Except age at first service, which is influenced by level of Holestien Friesian percentage, season of calving and level of Holestien Friesian percentage was not significant (P>0.05) on all reproductive traits. The traits calving interval and days open significantly (P<0.001) influenced by year of calving and parity. Season of birth (P<0.05) and year of birth (P<0.001) significantly influenced age at first service and age at first calving. Service per conception was significantly influenced by year of calving (P<0.001) only. Except number of service per conception, the result obtained for age at first service, age at first calving, days open and calving interval of Holstein Friesian and its crosses with Boran cows in the study area were below the standards set for commercial dairy farms. Therefore, consideration should be given to the farm to improve those genetic and non-genetic factors affected performance. تفاصيل المقالة

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15 - بررسی مقاومت ژنتیکی بره‌های نژاد قزل و آمیخته قزل-رومانوف نسبت به انگل‌های دستگاه گوارش
خسرو پارسایی مهر حبیب چراغی غلام علی مقدم

هدف از اجرای این طرح بررسی مقاومت ژنتیکی بره‌های نژاد قزل و آمیخته قزل-رومانوف نسبت به انگل‌های دستگاه گوارش استان آذربایجان‌شرقی می‌باشد. برای انجام این تحقیق از 10 رأس بره نر و ماده نژاد قزل و 10 رأس بره نر و ماده نژاد قزل-رومانوف استفاده شد. خوراندن داروی ضد انگل در أکثر

هدف از اجرای این طرح بررسی مقاومت ژنتیکی بره‌های نژاد قزل و آمیخته قزل-رومانوف نسبت به انگل‌های دستگاه گوارش استان آذربایجان‌شرقی می‌باشد. برای انجام این تحقیق از 10 رأس بره نر و ماده نژاد قزل و 10 رأس بره نر و ماده نژاد قزل-رومانوف استفاده شد. خوراندن داروی ضد انگل در روز شروع آزمایش و سپس 2 هفته بعد انجام شد. صفات مورد بررسی شامل: تست فاماچا، تست هماتوکریت، اسکور مدفوع و تعداد تخم نماتودها در هر گرم مدفوع بودند. داده‌ها با استفاده از نرم‌افزار SASو در قالب طرح کاملاً تصادفی انجام شد. نتایج به دست آمده نشان داد که، تست فاماچا در بره‌های نر و ماده‌ نژاد قزل و آمیخته قزل-رومانوف معنی‌دار بود (05/0p<). همچنین حجم سلول‌های خونی در بره‌های نژاد قزل-رومانوف بیشتر از بره‌های نژاد قزل می‌باشد اما این تفاوت از لحاظ آماری معنی‌دار نبود (05/0<p). میزان تخم نماتود در بره‌های نر و ماده نژاد قزل-رومانوف کاهش معنی‌داری نسبت به بره‌های نژاد قزل داشت (05/0p<). در مجموع تعداد تخم انگل بره‌های نژاد قزل-رومانوف در مقایسه با نژاد قزل مقدار کمتری دارد که در این میان بره‌های نر نژاد قزل-رومانوف دارای کمترین میزان تخم انگل به مقدار 2/16 بود (05/0p<). به طور کلی دورگ گیری بره‌های قزل با رومانوف موجب افزایش مقاومت نسبی به نماتودهای دستگاه گوارشی از لحاظ صفات اندازه‌گیری شده در این تحقیق است ولی دلیل ژنتیکی برتری دورگ‌ها نسبت به نژاد خالص و آگاهی از ماهیت پلی ژنی و یا اثرات غیر افزایشی نیاز به تحقیقات بیشتر دارد. تفاصيل المقالة

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16 - Protected Protein Supplement Based on Rumen Undegradable Protein to Enhanced Productivity of Etawah Crossbred Dairy Goats
I.G. Permana F.R. Pambudi S.I.Z. Arif D. Despal A. Rosmalia

High-lactating dairy goats require a substantial amount of protein. Protected protein supplements could provide a significant quantity of rumen undegradable protein (RUP), ensuring an adequate protein supply for high-lactating dairy goats. This study aimed to evaluate t أکثر

High-lactating dairy goats require a substantial amount of protein. Protected protein supplements could provide a significant quantity of rumen undegradable protein (RUP), ensuring an adequate protein supply for high-lactating dairy goats. This study aimed to evaluate the impact of protected protein supplements on the productivity of Etawah crossbred dairy goats. The study involved 16 Etawah crossbred lactating goats with an average milk production of 0.94 ± 0.38 L head-1 day-1 and an average body weight of 46.80 ± 7.50 kg. A randomized block design of four treatments and four replications was used. The treatment ration were: R0= a ration with 0% protected protein supplement content as control, R1= R0 + 5% protected pro-tein supplement, R2= R0 + 10% protected protein supplement, and R3= R0 + 15% protected protein sup-plement. Data was analyzed using ANOVA and continued to the Duncan test. The results showed that the R1, R2, and R3 treatments significantly (P<0.05) influenced the increase in feed intake, milk production, milk component production, milk urea nitrogen, and blood urea nitrogen. However, no significant effect was observed on milk quality, milk density, blood hematology, blood glucose, triglycerides, or economic factors. It can be concluded that adding a 5% protected protein supplement improved the performance of Etawah crossbred dairy goats without compromising milk quality and animal health. تفاصيل المقالة

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