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11 Cards in this Set
- Front
- Back
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What are breeding systems
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Sexual reproduction
Asexual reproduction |
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What are the avenues of sexual reproduction?
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Self pollination
Cross pollination |
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What issues do you want to consider when dessigning a breeding program?
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No of characters being selected for or against
No genes being selected for or against Relationships between characters such as genetic linkagse Genetic control of character Self or cross pollinated |
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how can genetic controls of characters be categorised?
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QUALITATIVE
Easy to select for in segregating populations Rapid genetic progress High heritability QUANTITATIVE Hard to select for in segregating populations Not rapid genetic progress Low heritability |
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What kind of breeding methods are there?
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There are different breeding methods depending on the breeding system.
For self-pollinated breeding systems, there is the following breeding methods: Single seed descent Bulk population method Doubled haploid method Recurrent selection method Pedigree Backcross method |
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What is single seed descent?
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One seed is selected from each plant per generation
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What is the bulk population method?
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Natural environment selects until later (f5 or f6) selection when artificial selection is applied
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What is the doubled haploid method?
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Haploid cells are derived from male gametophytes and invitro selection pressure aplpied in growing media
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What is the recurrent selection method?
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Recurrent cycles of crossing and selection
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What is the pedigree method?
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Involved hybridizing two parents
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What is the backcross method?
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Incorporation of genes from a non-recurrent parent into an adapted line or cultivar
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