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العنوان
Genetic evaluation for length of productive life of camel in Egypt /
المؤلف
Ismail, Shahdan Ahmed Hassan Morsi.
هيئة الاعداد
باحث / شهدان أحمد حسن مرسى إسماعيل
مشرف / فايق حسني حسين فراج
مشرف / ناظم عبدالرحمن شلبي
مشرف / طارق حسن مصطفي
الموضوع
Animal Production. Genetics.
تاريخ النشر
2019.
عدد الصفحات
p 119. :
اللغة
الإنجليزية
الدرجة
الدكتوراه
التخصص
الزراعية والعلوم البيولوجية (المتنوعة)
تاريخ الإجازة
1/1/2019
مكان الإجازة
جامعة المنصورة - كلية الزراعة - الإنتاج الحيوانى
الفهرس
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Abstract

Aim of study: Evaluate the productive and reproductive performance of Maghrebi she-camel as well as longevity and lifetime traits during the first lactation in one side and the first five lactations in the other side, under Egyptian conditions. In the same time studying the effect of several environmental factors and its effective role in controlling the dairy camel productive and reproductive programs using the animal model in one camel herd in Egypt. Materials and methods: Data used in the present study were collected from history sheets of milk records (420) of 92 Maghrebi she-Camels, number of dams were 55 sired by 15 bull, located at Center of Studies and Development of Camel production. Marsa Matrouh governorate belonging to Animal Production Research Institute (APRI), Ministry of Agriculture and Land Reclamation, Egypt. Data were covered the period from 2000 to 2017 year. Data were analyzed using the General Linear Model (PROC GLM) Procedure of the statistical analysis system (SAS, 2009). The model includes, season, year of calving as fixed effects, age at calving, days open and first milk yield as random effects.
Results: The overall unadjusted mean of age at first calving (AFC), days open (DO), calving interval (CI1), number of services per conception (NS/C1), total milk yield (TMY1) lactation period (LP1), number of lactation completed (NOL), culling age (CULL), length of productive life (PL), total lactation length (TLL), lifetime production (LMY), milk yield per lactation length (MPLL) and milk yield per day of productive life (MPPL) averaged 62.72 month, 168.30 days, 587.37 days, 2.17 services, 1408.76 kg, 410.15 days, 3.98 parity, 3861.80 days, 1940.63 days, 1389.74 days, 5266.02 kg, 4.08 kg and 3.03 kg, respectively. Season of calving had non-significant effect on age at first calving (AFC), days open (DO1), number of services per conception (NS/C1), total milk yield (TMY1), number of lactations (NOL), culling age (CULL), productive life (PL), lifetime total milk yield (LMY) and milk yield per day of productive life (MPPL), except for calving interval (CI1), lactation period (LP1), total lactation length (TLL) and milk yield per day of lactation length (MPLL) was significant (p<0.05). Heritability estimates for AFC, DO1, CI1, NS/C1, TMY1, LP1, NOL, CULL, PL, TLL, LMY, MPLL and MPPL were (0.28±0.06, 0.37±0.11, 0.64±0.14, 0.06±0.05, 0.32±0.07, 0.19±0.09, 0.35±0.09, 0.47±0.07, 0.27±0.07, 0.48±0.07, 0.31±0.06, 0.66±0.05 and 0.19±0.05, respectively).Conclusion: The camel is a very prominent and useful “infrastructure” of the desert, arid and semi-arid areas of the world. Great benefit can be achieved through the maximum exploitation of the animal. This suggests that the use of all animal records in its first lactation gives the good results of the genetic variance in animals, which can be used in selection programs as a criterion to improve longevity and total lifetime production in Maghrebi she-camels. This achieves the desired development in the field of animal production. Improvement of the reproductive efficiency of the camel could be very acceptable if a calf per each she-camel is produced every 2 years. Maintaining adequate nutritional level, advancing puberty, achieving conception outside the breeding season and shortening the days open, may be benefical in that respect. The use of artificial insemination may realize that level of the reproductive efficiency.