Abstract
The Objective of this research, study the performance on Shami goats of the studied traits.which include milk production kg, and litter size weight at birth and weaning kg were 270.24±67.24, 8.42±0.53 and 23.98±2.94, respectively. The value of the litter size number at birth and weaning, age and weight at first insemination, the values were 2.98 ± 0.04 and 2.20 ± 0.19, and 46.73±0.57/kg and 19.24±0.26/ month, respectively. Determine the effect of some genetic factors and non genetic (year of birth, parity, kids sex, age and weight at insemination) of the studied traits. And estimate some genetic parameters (heritability and genetic correlation) of the studied traits Statistical analysis was made of the studied traits 10knowledge of the genetic and environmental in fluencies in it. Duncan has been used to separate the means of the factors affecting the studied traits. And also use the animal model to estimate the genetic parameters. Estimates of heritability for milk production traits and litter size weight at birth and weaning were 0.14, 0.08, 0.20, respectively. Reached values of genetic correlations between the production of milk and both of the litter size weight at birth and weaning -0.17 and -0.01, respectively. While the genetic correlation between the litter size weight at birth and at weaning was 0.09.
Highlights
Genetic evaluation for milk production, the weights of kids at birth and weaning for dairy Damascus goats
Estimate some genetic parameters of the studied traits Statistical analysis was made of the studied traits 10knowledge of the genetic and environmental in fluencies in it
.P < ٠,٠٥ تأثير سنة الولادة :وجد أن أعوام ٢٠٠١و ٢٠٠٢و٢٠٠٣ تفوقت معنوياً على جميع سنوات الولادة .تأثير ترتيب موسم الولادة :وجد أن الموسم الثالث قد تفوق معنوياً على جميع المواسم .تأثير جنس المواليد :وجد أيضاً أن الولادات الثلاثية بلغت المكافئات الوراثية للصفات المدروسة )إنتاج الحليب والوزن عند الميلاد والفطام( ٠,١٤و ٠,٠٨و ٠,٢٠على التوالي. والارتباطات الوراثية كان سالباً بين إنتاج الحليب ووزن المواليد عند الميلاد ووزن المواليد عند الفطام ) (٠,١٧-و) (٠,٠١-على التوالي .وبين وزن المواليد عند الميلاد ووزن المواليد عند الفطام .٠,٠٩بينما كان المكافئ الوراثي لصفة وزن المواليد عند الميلاد والفطام على التوالي Mavrogenis ٠,٤٧ ،٠,٣١وآخرون ).(٣٢ وأيضا قدر الارتباط الوراثي بين كتلتي البطن عند الميلاد والفطام و Mavrogenisوآخرون ) (٣٢بلغت تقديراتھم ٠,٣٤ ،٠,٨٢ على التوالي في دراستھم على الماعز الشامي في قبرص .وقدر المكافئ الوراثي لوزن المواليد عند الميلاد والفطام ٠,١٠و ٠,٢٥على التوالي ) .(٣٠وبدراسات أخرى بلغ المكافئ الوراثي لإنتاج الحليب في الماعز الشامي ٠,٠٢ ،و ٠,٧٣على التوالي
Summary
Genetic evaluation for milk production, the weights of kids at birth and weaning for dairy Damascus goats.
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