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Genetic parameters and selection efficiency using part-records for production traits in strawberries
1Department of Pomology, University of California, 95616, Davis, CA, USA.
Summary
Strawberry yield and fruit size selection can be optimized using partial records. Utilizing cumulative weekly data or alternate-week harvests significantly improves genetic gain efficiency in breeding programs.
Area of Science:
- Plant Breeding
- Horticultural Science
- Quantitative Genetics
Background:
- Optimizing selection efficiency is crucial for crop improvement in strawberry (Fragaria x annanasa).
- Traditional breeding relies on complete-season data, which can be time-consuming and resource-intensive.
- Exploring partial data records offers potential for enhanced selection strategies.
Purpose of the Study:
- To evaluate the efficiency of using partial season records for selecting strawberry yield and fruit size.
- To compare the effectiveness of cumulative weekly data versus complete-season records.
- To assess the utility of alternate-week harvest data for increasing selection intensity.
Main Methods:
- Analysis of individual strawberry seedling data from four genetic tests.
- Generation of part-records using cumulative weekly sums and alternate-week harvests.
- Comparison of heritability estimates and predicted genetic gains between part-records and complete records.
Main Results:
- Heritability estimates for part-records, especially mid-season cumulative ones, were often higher than for complete-season records.
- Predicted genetic gains were maximized using cumulative part-records from weeks 4-12 of a 15-week season.
- Alternate-week selection proved efficient, balancing increased selection intensity with reduced individual genetic information.
Conclusions:
- Partial season records, particularly cumulative weekly data (4-12 weeks), offer efficient selection for strawberry yield and fruit size.
- Alternate-week harvesting strategies can enhance breeding program efficiency.
- The optimal selection strategy depends on specific traits and breeding program objectives.
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