The N'Dama cattle genetic improvement programme: a review

2007 ◽  
Vol 40 ◽  
pp. 65-69 ◽  
Author(s):  
N.A. Bosso ◽  
N. Corr ◽  
M. Njie ◽  
A. Fall ◽  
E.H. van der Waaij ◽  
...  
Keyword(s):  
Production System ◽  
Genetic Improvement ◽  
Implementation Process ◽  
The Gambia ◽  
Genetic Progress ◽  
Low Input ◽  
Improvement Programme ◽  
N’Dama Cattle

SummaryThis paper reviews the successful N'Dama cattle genetic improvement programme implemented in a low input production system at the International Trypanotolerance Centre (ITC) in 1994, in The Gambia. The first part of the paper presents the genetic improvement programme. The second part deals with the analysis of the genetic improvement programme. The success of the genetic improvement programme expressed through genetic progress and the benefits for the farmers is encouraging. Recommendations to strengthen the implementation process in the field are made.

scholarly journals Do Crossbreeding using Exotic Breeds in Goat is the Right Solution for a Low-input Production System in Ethiopia? : A Review

2021 ◽  
Author(s):  
Zeleke Tesema ◽  
Damitie Kebede
Keyword(s):  
Production System ◽  
Genetic Improvement ◽  
Reproductive Technologies ◽  
Improvement Program ◽  
Selection Program ◽  
Low Input ◽  
The Future ◽  
Improvement Programs ◽  
Breed Selection ◽  
The Right

Analysis and evaluation of the previous genetic improvement attempts and their fruition are paramount to make the right decision in the future. Hence, this paper reviews the status of goat genetic improvement programs through quantitative evidence and elucidates how it can be implemented in the future through an intensive literature review. Goat genetic improvement through crossbreeding was initiated early in 1975. However, most crossbreeding programs have lacked analysis of the existing resources and infrastructure and also lack long-term strategies. As a result, crossbreeding program was discontinued without significant contribution due to incompatibility of the exotic genotype with low-input production systems. On the other hand, the moderate to high genetic variation within a population open the window for within-breed selection. Accordingly, a well-designed within-breed selection program was initiated late in 2013 for specified breeds. Currently, governmental and non-governmental institutions plan to scale up community-based within-breed selection program. Besides, the efficiency of assisted reproductive technologies in goat genetic improvement was evaluated by ICARDA and reported a moderate achievement. However, the application of molecular technologies in Ethiopia is only limited to diversity studies. Nevertheless, there is an opportunity to use molecular technologies to enhance the genetic progress of a genetic improvement program. In conclusion, the expected benefits from crossbreeding program were not obtained and will not be obtained under the existing low input-production system. Therefore, a within-breed selection program would be an ideal option for the existing low-input production system if integrated with assisted reproductive and molecular technologies.

Effect of strategic gastrointestinal nematode control on fertility and mortality of N'Dama cattle in The Gambia

1997 ◽  
Vol 73 (1-2) ◽  
pp. 105-117 ◽  
Author(s):  
J. Zinsstag ◽  
Ph. Ankers ◽  
P. Itty ◽  
M. Njie ◽  
J. Kaufmann ◽  
...  
Keyword(s):  
Gastrointestinal Nematode ◽  
The Gambia ◽  
Nematode Control ◽  
N’Dama Cattle

Helminth parasites and hypobiosis of nematodes in N'Dama cattle during the dry season in The Gambia

1995 ◽  
Vol 60 (1-2) ◽  
pp. 161-166 ◽  
Author(s):  
M. Ndao ◽  
V.S. Pandey ◽  
J. Zinsstag ◽  
K. Pfister
Keyword(s):  
Dry Season ◽  
The Gambia ◽  
Helminth Parasites ◽  
N’Dama Cattle

ARE TODAY’S DAIRY CATTLE BREEDING PROGRAMS SUITABLE FOR TOMORROW’S PRODUCTION REQUIREMENTS?

1980 ◽  
Vol 60 (2) ◽  
pp. 253-264 ◽  
Author(s):  
A. J. McALLISTER
Keyword(s):  
Dairy Cattle ◽  
Genetic Improvement ◽  
Herd Size ◽  
Breeding Program ◽  
Genetic Trend ◽  
Genetic Progress ◽  
Breeding Programs ◽  
Holstein Breed ◽  
Dairy Cattle Breeding ◽  
National Production

In the last decade the dairy cattle population has declined to a level of 1.9 million cows in 1978 with about 56% of these cows bred AI and nearly 20% of the population enrolled in a supervised milk recording program. The decline in cow numbers has been accompanied by an increase in herd size and production per cow. The current breeding program of the dairy industry is a composite of breeding decisions made by AI organizations, breeders who produce young bulls for sampling and all dairymen who choose the sires and dams of their replacement heifers. Estimates of genetic trend from 1958–1975 for milk production in the national milk recorded herd range from 21 to 55 kg per year for the four dairy breeds with Holsteins being 41 kg per year. Both differential use of superior proven sires and improved genetic merit of young bulls entering AI studs contribute to this genetic improvement. Various national production and marketing alternatives were examined. Selection is a major breeding tool in establishing a breeding program to meet national production requirements for milk and milk products once the selection goal is defined. AI and young sire sampling programs will continue to be the primary vehicle for genetic improvement through selection regardless of the selection goal. The current resources of milk-recorded cows bred AI is not being fully utilized to achieve maximum genetic progress possible from young sire sampling indicate that the number of young bulls sampled annually in the Holstein breed could be tripled with the existing milk-recorded and AI bred dairy cow population. Expanded milk recording and AI breeding levels could increase the potential for even further genetic improvement. The potential impact of selection for other traits, crossbreeding and the use of embryo transfer of future breeding programs is highlighted.

A new genetic evaluation system for pedigree beef cattle in great britain

1992 ◽  
Vol 1992 ◽  
pp. 200-200
Author(s):  
J.G.E. Bryan ◽  
N.R. Wray ◽  
R. Crump ◽  
D.G. Nicholson ◽  
R. Thompson
Keyword(s):  
Great Britain ◽  
Beef Cattle ◽  
Evaluation System ◽  
Genetic Improvement ◽  
Herd Size ◽  
Genetic Progress ◽  
Selection Decisions ◽  
Speed Up ◽  
Beef Herd ◽  
Analysis Of Performance

The need to speed up the rate of genetic progress in beef cattle, particularly in economically significant traits such as growth and carcase merit has always been recognised by the Meat and Livestock Commission. This is achieved through the Beefbreeder Pedigree Recording Service which records over 1,000 pedigree herds in Great Britain. Traditionally, analysis of performance records from pedigree herds has been carried out using within herd contemporary comparisons.Average pedigree beef herd size in Great Britain is typically less than 20 cows which limits accuracy and scope for genetic improvement when making within herd selection decisions.

Sign in / Sign up

Export Citation Format

Share Document