Agr 404 plant breeding and genetics
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This document discusses two plant breeding methods: the pedigree method and bulk population breeding method. The pedigree method uses hybridization to generate variability followed by selection and maintaining records of ancestry over multiple generations for up to 12 years. It allows for high genetic purity but is expensive. Bulk population breeding is the oldest, simplest, and cheapest method that involves bulking generations without pedigree records, making it slower but more convenient.
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Agr 404 plant breeding and genetics
- 1. October 27, 2015 AGR- 404 1 AGR-404 Introduction to Plant Breeding & Genetics
- 2. October 27, 2015 AGR- 404 2 Pedigree Method
- 3. October 27, 2015 AGR- 404 3 Pedigree Method Key features: Records of the ancestry of the cultivar Hybridization is used to generate variability Followed by selection of a segregating population Applications: Mainly crop plants Improvement of quantitative traits
- 4. October 27, 2015 AGR- 404 4 Establish base population Space plant progenies of selected plants Keep records of generations Procedure Pedigree Method
- 5. October 27, 2015 AGR- 404 5 Procedure (Cont...) •Making Crosses •Raising F1 Generation •Generations of Individuals Plants Selection •Generation of line Selection •Final Selection Pedigree Method
- 6. October 27, 2015 AGR- 404 6 Pedigree Method
- 7. October 27, 2015 AGR- 404 7 + Elimination of the undesirable materials from population + Pedigree records of all selected plant and families are maintained, the inheritance studies can carried out. +/- High degree of genetic purity - Expensive - Takes 10 – 12 years Advantages and disadvantages Pedigree Method
- 8. October 27, 2015 AGR- 404 8 Bulk Population breeding
- 9. October 27, 2015 AGR- 404 9 •Oldest, Simplest and the cheapest method. •Its Known as Population Breeding Bulk Population method Bulk Population Breeding Mass Method Evolutionary method of breeding Bulk Population Breeding
- 10. October 27, 2015 AGR- 404 10 Procedure The Method involves the following Steps •Making Crosses •Raising F1 Generation •Generations of Bulking •Generations of Lines Evaluation •Final Selection and Evaluation Bulk Population Breeding
- 11. October 27, 2015 AGR- 404 11 Bulk population breeding
- 12. October 27, 2015 AGR- 404 12 Advantages •Simple and convenient •Less labor intensive and less expensive •Natural selection may increase frequency of desirable traits •Handling large quantity of material. Bulk Population Breeding
- 13. October 27, 2015 AGR- 404 13 Disadvantages •The improvement attained is slow. •Pedigree record not maintained, •Selecting in off-season may favor genotypes that are undesirable in the production region Bulk Population Breeding
- 14. October 27, 2015 AGR- 404 14 Comparison of Bulk Method & Pedigree Method Bulk Method Pedigree Method Natural Selection Artificial Selection Low Rate of Improvement High Rate of Improvement Improvement Long Lasting Improvement not long lasting Convenient & Less Expensive Most Expensive
- 15. October 27, 2015 AGR- 404 15 Have A Nice Day Thanks