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Register a new userAnalysis of the Genetic Diversity in Syrian Shami Goats
تحليل التنوع الوراثي للماعز الشامي في سورية
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Damascus University أطروحة دكتوراه
Publication date
2013
fields
Agricultural Engineering
and research's language is
العربية
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يعد الماعز الشامي في سورية من الحيوانات الزراعية المحلية الهامة لما يملكه من مزايا ومواصفات تمكنه من الإنتاج والتناسل تحت الظروف البيئية القاسية لهذا فقد استخدم في برامج الخلط التربوي مع الماعز الجبلي كمعطي لمورثات صفة إنتاج الحليب الجيدة للحيوانات الخليطة
No English abstract
References used
الخوري , فارس قيصر ( 1998) مداولات ندوة إنتاج الأغنام والماعز ,أكساد عمان
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Shami goat in Syria is one of the important domestic breeds, because of its
high productivity and breeding capacity under the hard environmental
conditions and it is still being used in crossbreeding with Mountain goats as a
donor for milk produci
ng traits. This breed is still far away from scientific
investigations even it has been exposed to a random crossbreeding with
Mountain goats by goat breeders. This has lead to the possibility of losing some
of its genetic characteristics which are not detected yet. In this research the
genetic diversity among groups of pure Shami goats was determined using
ISSR-PCR on blood and results indicated that there was a molecular genetic
diversity among studied goats and polymorphic rate was register to 100%.
The research aimed to evaluate the genetic diversity and the genetic
relationship between 16 Hordeum vulgare genotypes (variaties and new lines),
using SSR markers. 32 primer pairs were used in the analysis, five of them
amplified primers monomorp
hic alleles, while the remaining primers detected
different alleles. A total of 126 polymorphic alleles were revealed by the 27
primer pairs. The number of different alleles detected on alocus ranged from 2
to 11with a mean of 4.66 alleles per locus. The polymorphic information content
(PIC) values ranged from 0.21 to 0.88 with a mean value of 0.49, and the gene
diversity ranged from 0.23 to 0.89 with a mean value of 0.53.The dendrogram
was established using SSR data clustered into three major groups. The smallest
genetic relationship was observed between line39 and line38 . The results proved
the efficiency of SSR markers in the estimation of genetic diversity and in the
clustering of the barley genotypes in Syria.
Random Amplified Polymorphic DNA (RAPD) was used to evaluate genetic
diversity among 11 Yemeny pomegranate types. Samples were collected in 2004
from three main regions: east, middle and north of the country (Rada, Hada
and Saada). PCR amplificati
on of pomogranate DNA with 30 random primers
generated 1013 bands, 118 of them were polymorphic 11.5%. Results showed
that the genetic diversity within the tested types was limited. Similarity values
ranged between 59 –96 % with a mean of 79 %. Statistical analysis showed
that the types can be divided into two clusters: cluster 1 with Orkobi and
Mellies types found in the Hada region; cluster 2 includes nine types belonging
to the Saada and Radaa regions .High similarity (90–96%) was obtained with
Khazemy, Liessy 1, Liessy 2, Taefi, Ahmer and Balady types. Whereas, some
types could be considerd as separate cultivars due to their high genetic
diversity such as, Orkoby and Mellies (Hada region) in addition to Bohssom,
Sommaty and Liessy 3 in the Saada region.
This Study was carried-out at Shami Goat Improvement Station in Karahta.
Ten growing Shami male goats, aged 8 months, housed and managed under the
same conditions were used to study the semen characteristics. Artificial vagina
was used to collect
semen at weekly intervals, for 13 months to determine the
volume, motility, pH, and sperm concentration using Neubaure- Spectrophotometer
and Spermiodensimeter techniques.
Overall averages and standard errors of volume, motility, concentration,
and pH were 0.9 ± 0.07 ml, 65.24 ± 1.41%, 3.57 ± 0.14 billion/ml, and 6.52 ±
0.07, respectively. Seasonal variations were observed. A positive significant
correlation between volume and motility (r= 0.42, P<0.01) was found, while
negative correlations (P<0.01) between pH and other studied semen
characteristics were recorded.
Linear equations for detecting sperm concentration as measured by either,
Spermiodensimeter or Spectrophotometer were obtained.
This Study was carried-out in Karahta station for improvement of Shami
goats, Directorate of Animal Production Research, Ministry of Agriculture and
Agrarian Reform. Fifty growing Shami male goats aged ٣ months, were used to
measure the growth rat
e of testicular parameters, their relation to the
development of body weight and the effect of several factors on their
development from weaning at ٣ months to ٢١ months of age. All kids housed
and managed under the same conditions.
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