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Mansoura University (2019)

Genetic evaluation for length of productive life of camel in Egypt

Ismail, Shahdan Ahmed Hassan Morsi

Titre : Genetic evaluation for length of productive life of camel in Egypt

Auteur : Ismail, Shahdan Ahmed Hassan Morsi.

Etablissement de soutenance : Mansoura University

Grade : Doctor of Philosophy (PhD) in Agricultural Sciences 2019

Résumé partiel
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

Présentation étendue (EULC)

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