- Library Home /
- Search Collections /
- Open Collections /
- Browse Collections /
- UBC Theses and Dissertations /
- Development of the barred New Hampshire at the University...
Open Collections
UBC Theses and Dissertations
UBC Theses and Dissertations
Development of the barred New Hampshire at the University of British Columbia Knight, Ursula Helen
Abstract
A project in poultry breeding was undertaken to develop an autosexing breed of poultry that was suitable for both egg and meat production. A strain of New Hampshires that had been bred, selected and tested for production was used as foundation stock. To adapt the New Hampshire breed for autosexing, the barring factor was introduced from the Redbar, which had been previously developed at The University of British Columbia. A key for autosexing Barred New Hampshires was prepared by which a high degree of accuracy was obtained in sexing progeny that was 'pure’ for the barring factor. Two distinct lines of Barred New Hampshires were developed, one bred by the Punnett and Pease method of maintaining 50% relationship to each of the parent breeds, and the other by the Hagedoorn method, of continually backcrossing to the superior parent breed to establish close relationship. The latter line was uniformly superior in characteristics associated with meat and egg production. A selection level was contrived for the Barred New Hampshires, including an arbitrary selection level for female breeding stock and, in addition, a selection index for males to head the breeding pens. In the third year of their development, the Barred New Hampshires excelled the basic New Hampshire breed in ‘meat type’ and persistency of egg production, were approximately equal in total egg production, egg weight, rate of growth and viability, but showed a higher incidence of broodiness. Fertility, hatchability and rate of feathering in the new autosexing breed were satisfactory. Further breeding will be required for purification and improvement of the breed.
Item Metadata
| Title |
Development of the barred New Hampshire at the University of British Columbia
|
| Creator | |
| Publisher |
University of British Columbia
|
| Date Issued |
1950
|
| Description |
A project in poultry breeding was undertaken to develop an autosexing breed of poultry that was suitable for both egg and meat production. A strain of New Hampshires that had been bred, selected and tested for production was used as foundation stock. To adapt the New Hampshire breed for autosexing, the barring factor was introduced from the Redbar, which had been previously developed at The University of British Columbia. A key for autosexing Barred New Hampshires was prepared by which a high degree of accuracy was obtained in sexing progeny that was 'pure’ for the barring factor. Two distinct lines of Barred New Hampshires were developed, one bred by the Punnett and Pease method of maintaining 50% relationship to each of the parent breeds, and the other by the Hagedoorn method, of continually backcrossing to the superior parent breed to establish close relationship. The latter line was uniformly superior in characteristics associated with meat and egg production. A selection level was contrived for the Barred New Hampshires, including an arbitrary selection level for female breeding stock and, in addition, a selection index for males to head the breeding pens. In the third year of their development, the Barred New Hampshires excelled the basic New Hampshire breed in ‘meat type’ and persistency of egg production, were approximately equal in total egg production, egg weight, rate of growth and viability, but showed a higher incidence of broodiness. Fertility, hatchability and rate of feathering in the new autosexing breed were satisfactory. Further breeding will be required for purification and improvement of the breed.
|
| Genre | |
| Type | |
| Language |
eng
|
| Date Available |
2012-03-05
|
| Provider |
Vancouver : University of British Columbia Library
|
| Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
|
| DOI |
10.14288/1.0106905
|
| URI | |
| Degree | |
| Program | |
| Affiliation | |
| Degree Grantor |
University of British Columbia
|
| Campus | |
| Scholarly Level |
Graduate
|
| Aggregated Source Repository |
DSpace
|
Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.