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Selective breeding method by comprehensive selection indexes of resistance of Eimeria tenella of chickens

A technology of comprehensive selection index and Eimeria coccidiosis, which is applied in animal husbandry and other fields, can solve the problems of drug residues, drug resistance of chicken flocks, and reduce the safety and quality of chicken products, so as to reduce labor intensity and significantly correlate , good effect

Inactive Publication Date: 2014-12-24
YANGZHOU UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

For a long time, the main means of controlling coccidiosis in chickens is the use of antibiotics and chemical drugs. Although the prevention and control of coccidiosis in chickens has benefited from these drugs, problems such as drug resistance of chickens have also arisen at the same time
In addition, the use of antibiotics and chemical drugs will eventually cause drug residues in eggs and chicken, reducing the safety and quality of chicken products
At present, there is no relevant research report on breeding methods for resistance to Eimeria tenella in chickens

Method used

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  • Selective breeding method by comprehensive selection indexes of resistance of Eimeria tenella of chickens
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  • Selective breeding method by comprehensive selection indexes of resistance of Eimeria tenella of chickens

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specific Embodiment approach 1

[0035] DETAILED DESCRIPTION 1. Determination of the challenge dose of Eimeria tenella sporulated oocysts

[0036] In May 2010, 60 1-day-old Jinghai yellow chickens were purchased from Jiangsu Haimen Group, and were raised in a coccidia-free cage (single cage) sterilized by gasoline blowtorch flame before landing. The feed used did not contain any coccidia and Anticoccidial active drugs were randomly divided into 3 groups at 30 days of age with 20 chickens in each group. Each chicken in the first group was gavaged with 20,000 chickens, the second group was 25,000, and the third group was 30,000 tender Emel balls. The oocysts were sporulated, and the third group of chickens died due to coccidiosis within 0-9 days after challenge, and the mortality rate was 25.0%, while the first and second groups did not die. The optimal surviving challenge dose was determined to be 25,000 per animal.

[0037] 2. Screening and determination of effective coccidia resistance indicators

[0038] ...

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Abstract

The invention relates to the field of disease-resistant breeding of poultry, in particular to a selective breeding method by comprehensive selection indexes of resistance of Eimeria tenella of chickens. The selective breeding method includes feeding a certain quantity of eimeria tenella spore oocysts of each chicken some-day old, measuring incremental weight within 3-5 days after infection and concentration of CAT (catalase), SOD (superoxide dismutase), GSH-Px (glutathione peroxidase), MDA (malondialdehyde) and IFN-gamma (interferon-gamma) in blood plasma in eighth day after infection, converting the six indexes into standard Z scores, and substituting into a comprehensive selection index formula to calculate comprehensive selection index values of each chicken, and selecting to reserve resistant chicken individuals according to the values.

Description

technical field [0001] The invention relates to the field of poultry breeding, in particular to a selective breeding method for establishing a comprehensive selection index for Eimeria tenella chicken resistance to screen resistant chicken individuals. Background technique [0002] Chicken coccidiosis is an epidemic acute parasitic disease caused by one or more coccidia invading the intestinal epithelial cells of chickens, of which Eimeria tenella is the most serious. The lethality and morbidity rates of 35-60-day-old chicks and 10-30-day-old chicks are as high as 80%. Sick chickens have a reduced ability to absorb nutrients, their growth is greatly affected, and they cannot recover for a long time. According to statistics, the annual economic loss of the poultry industry caused by coccidiosis in the United States exceeds 1.5 billion US dollars, of which 74% is caused by subclinical chicken growth retardation and decreased feed utilization, and 24% is caused by increased ex...

Claims

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Application Information

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IPC IPC(8): A01K67/02
Inventor 戴国俊孙明明尉浩华林雨鑫孙大辉王金玉张根喜谢恺舟侍苗苗王成丽
Owner YANGZHOU UNIV
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