Related Experiment Videos
The search for the Booroola (FecB) mutation
G W Montgomery1, J M Penty, E A Lord
1Department of Biochemistry, University of Otago, Dunedin, New Zealand.
Journal of Reproduction and Fertility. Supplement
|January 1, 1995
Summary
Researchers are pinpointing a specific gene mutation (FecB) in Booroola Merino sheep that boosts litter size. Positional cloning and advanced genetic mapping are key to identifying this reproductive trait gene.
Area of Science:
- Animal Genetics
- Reproductive Biology
- Genomics
Background:
- The Booroola Merino sheep harbors a mutation (FecB) responsible for increased ovulation rates and litter size.
- Understanding the genetic basis of this trait is crucial for livestock breeding and reproductive research.
Purpose of the Study:
- To identify the specific gene responsible for the FecB mutation using positional cloning.
- To refine the genetic map around the FecB locus and isolate the causative mutation.
Main Methods:
- Positional cloning and linkage analysis to map the FecB locus on sheep chromosome 6.
- Development of a sheep yeast artificial chromosome (YAC) library for large-scale genomic analysis.
- Screening of the YAC library to identify clones spanning the FecB region.
Main Results:
- The FecB locus has been mapped to a specific region on sheep chromosome 6, between the SPP1 and EGF genes.
- Candidate gene analysis has excluded several reproductive control genes.
- A refined linkage map places the FecB locus towards the centromere, and a YAC library is being screened.
Conclusions:
- Ongoing efforts are focused on isolating the FecB mutation within the identified genomic region.
- Identifying the FecB gene will elucidate the mechanisms controlling ovulation rate in Booroola sheep.
- This research has implications for genetic improvement in sheep populations.