| Titles |
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English :
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Chromosomal abnormalities in infertile buffalo with special on fragile sites
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Arabic :
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الشذوذ الكروموسومى في الجاموس منخفض الخصوبة مع التركيز على اماكن الضعف في الكروموسوم
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| Abstract |
Thirty-eight breedable female buffalo were used to identify the relation between chromosomal abnormalities and infertility, with a special focus on the fragile sites located on the buffalo genome. Animals were classified into three groups according to rectal examination and fertility records. These groups consisted of 18 sterile heifers, 10 repeat breeder buffalo cows and 10 fertile buffalo cows as a control group. Blood samples were collected from the animal's jugular vein under aseptic conditions. Standard blood culture technique was performed to identify the different types of chromosomal abnormalities and their frequencies with special focus on the fragile sites in buffalo genome.
Incidence of numerical abnormalities was almost similar in all the studied groups, ranged from 0.8 to 1.2%. The appearance of polyploidy was the unique type among the numerical abnormality observed. However, incidence of structural abnormalities was high (20.4%) in the sterile heifer group followed by the repeat breeder group (17.7%), whereas the lowest percentage (10.2%) was in the control group. Incidence of autosomal aberrations was almost similar in the studied groups, 12.3 % and 14.6% in repeat breeder and sterile heifer groups, respectively compared to 9.2% in the control. Whereas, incidence of X-chromosome abnormalities was 5.4 % and 5.8% in repeat breeder and sterile heifer groups, respectively compared to 1 % in the control. Different types of structural abnormalities were considerably observed in sterile heifers followed by repeat breeder group and the control, except that of autosomal chromosomal gaps and chromatid breaks in X-chromosome, which had no clear trend. The X-chromosomes were more prone to these aberrations than autosomal in infertile animals. The phenomenon of fragile sites was not observed between those animals in the studied groups.
Keywords: Buffalo, sterility, repeat breeder, chromosome aberrations, fragile sites.
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| Publication year |
2002
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| Pages |
75-85
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| Availability location |
معهد بحوث الانتا ج الحيوانى- شارع نادى الصيد- الدقى- الجيزة
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| Availability number |
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| Organization Name |
Animal Production Research Institute (APRI)
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| serial title |
Egyptian Journal of Animal Production
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| Author(s) from ARC |
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| External authors (outside ARC) |
كريمة فتحى محروس
المركز القومى للبحوث
محمد صابر حسنين
المركز القومى للبحوث
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| Agris Categories |
Animal physiology - NutritionAnimal physiology - Reproduction
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AGROVOC
TERMS |
Chromosome aberrations.
Females.
Fertility.
Water buffaloes.
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| Proposed Agrovoc |
sterility;repeat breeder;fragile sites;
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| Publication Type |
Journal
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