BREEDING FOR IMMUNE RESPONSE IN JAPANESE OUAIL
Mohammed Atef Youssef Helal;
Abstract
The present study was carried out on Japanese quail flock belonging to the Animal Husbandry Department, Faculty of Veterinary Medicine, Alexandria University and continued for three generations after establishment of the base
one.
The experiment was planned to investigate the response to divergent selection for high and low antibody titer to inactivated Newcastle disease virus vaccine. Also to measure the correlated responses of body weight at hatch, two weeks, four weeks and six weeks of age, egg weight and egg number during the
first 45 days of egg production, Fertility and hatchability percentages, some
-----
serum parameters (total protein, albumen, globulin and gamma-globulins) and phagocytic activity. In addition, heritability as well as genetic and phenotypic correlations of the studied traits were estimated.
Results were discussed and summarized as follows:
I. Direct response to selection for high and low antibody titer to NDV
vaccine:
1. Response to selection for high and low antibody titer to inactivated NDV vaccine was immediate as evidenced by the highly significant difference (P>O.Ol) between the high and low lines, control and low lines and high and control lines in the first generation. These differences became progressively larger in successive generations.
2. Actual selection differential values from the base to the first, the first to the second, from the second to third and from the base to the third generations were 2.54, 1.96, 1.4 and 5.9, respectively in the high line and- 2.4,- 2.47,-
1.35 and- 6.22, respectively in the low line.
one.
The experiment was planned to investigate the response to divergent selection for high and low antibody titer to inactivated Newcastle disease virus vaccine. Also to measure the correlated responses of body weight at hatch, two weeks, four weeks and six weeks of age, egg weight and egg number during the
first 45 days of egg production, Fertility and hatchability percentages, some
-----
serum parameters (total protein, albumen, globulin and gamma-globulins) and phagocytic activity. In addition, heritability as well as genetic and phenotypic correlations of the studied traits were estimated.
Results were discussed and summarized as follows:
I. Direct response to selection for high and low antibody titer to NDV
vaccine:
1. Response to selection for high and low antibody titer to inactivated NDV vaccine was immediate as evidenced by the highly significant difference (P>O.Ol) between the high and low lines, control and low lines and high and control lines in the first generation. These differences became progressively larger in successive generations.
2. Actual selection differential values from the base to the first, the first to the second, from the second to third and from the base to the third generations were 2.54, 1.96, 1.4 and 5.9, respectively in the high line and- 2.4,- 2.47,-
1.35 and- 6.22, respectively in the low line.
Other data
| Title | BREEDING FOR IMMUNE RESPONSE IN JAPANESE OUAIL | Other Titles | التربية للاستجابة المناعية فى السمان اليابانى | Authors | Mohammed Atef Youssef Helal | Issue Date | 1999 |
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