|
|
Relationships between some body measurements and productive traits in golden Montazah and Mandarah chickens
|
|
Abstract: This study was conducted to investigate the relationships between some body measurements at 20 weeks of age and productive traits in two local strains of chickens. A total of 212 pullets from Golden Montazah and Mandarah strains (106 pullets from each) were individually weighed, conformation measurements at 20 weeks of age. Data on shank, thigh, keel and breast width lengths were classified according to three categories (short, medium and long lengths). All pullets were moved to individual layer cages to 90 days of laying. At 84 days of laying, one egg from each hen yield was broken to determine egg quality traits.
Age at sexual maturity for Golden Montazah was 173.1 days and 171.0 days for Mandarah, it was gradually decreased (P<0.05) with the increasing of breast width. Body weight at sexual maturity averaged 1592.1 g and 1508.9 g in Golden Montazah and Mandarah, respectively. Long measurements recorded the heaviest (P< 0.05) body weight at sexual maturity except breast width. Egg weight at sexual maturity average 35.4 g and 36.5 g in Golden Montazah and Mandarah, respectively, it was gradually increased (P< 0.05) with the increasing of keel length.
Golden Montazah hens exceeded (P< 0.05) Mandarah in each of egg number, egg mass and rate of laying in the first 90 days of laying. Egg production traits gradually increased (P< 0.05) with decreasing the thigh length and with increasing the keel length. Short thighs and long keels in Golden Montazah were related with higher (P< 0.05) egg number, egg mass and rate of laying in the first 90 days of laying. Short shank and long breast width in Mandarah hens were related with higher (P< 0.05) egg number and rate of laying in the first 90 days of laying. The medium keels and long breast width were related with the heaviest (P < 0.05) egg mass.
Golden Montazah eggs were significantly (P<0.05) highest Haugh unit whereas, Mandarah eggs had significantly highest albumen percentage. Shanks in Golden Montazah were significantly (P< 0.05) effect on egg shape index, while keels of shanks, thighs (Golden Montazah) and keels (Mandarah) were significant (P<0.05) effect on yolk and albumen percentages, however thigh length and breast width in Mandarah were significant (P<0.05) effect on Haugh unit and shell percentage, respectively. .
Thigh length was negatively significant and keel length was positively significant correlated with most egg production' traits for Golden Montazah, while shank length was negatively significant and breast width length was positively correlated with most egg production with Mandarah hens at (P < 0.05).
Conclusively, it could be concluded that thigh and keel lengths were greatly related with high egg production traits in Golden Montazah, while the shank and breast width lengths in Mandarah took the same importance.
Keyword: local strain, body measurements, egg production, egg quality.
|
| Publication year |
2002
|
| Pages |
7225-7238
|
| Availability location |
معهد بحوث الانتاج الحيوانى- شارع نادى الصيد- الدقى - الجيزة
|
| Availability number |
|
| Organization Name |
|
| City |
المنصورة
|
| serial title |
Journal Agricultural Science Mansoura University
|
| ISSN |
1110-0346
|
| Author(s) from ARC |
|
| Agris Categories |
Animal physiology - Reproduction
|
AGROVOC
TERMS |
Body measurements.
Chickens.
Egg production.
Production.
|
| Proposed Agrovoc |
egg quality;local strain;
|
| Publication Type |
Journal
|