chapter 5 seed selection. self-pollination fixed traits (homozygous) = inbred
TRANSCRIPT
![Page 1: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/1.jpg)
Chapter 5Chapter 5Seed SelectionSeed Selection
![Page 2: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/2.jpg)
Self-pollination
• Fixed traits (homozygous) = “inbred”
![Page 3: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/3.jpg)
Self-Pollination
Non-inbred
Inbred1x
Inbred2x
![Page 4: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/4.jpg)
Cross-pollination
• Fixed traits (homozygous) = “inbred”
![Page 5: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/5.jpg)
Controlled crosses
![Page 6: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/6.jpg)
Controlled crosses
![Page 7: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/7.jpg)
Controlled crosses
![Page 8: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/8.jpg)
Cross-Pollination& hybrid vigor
B73 B73 x Mo17 Mo17
![Page 9: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/9.jpg)
Cross-Pollination& hybrid vigor
B73 Mo17 B73 x Mo17
![Page 10: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/10.jpg)
Avoiding self-pollination
• Pollen sterility - genetically engineered
CytoplasmicMale Sterility
![Page 11: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/11.jpg)
Avoiding self-pollination
• Pollen sterility - genetically engineered Cytoplasmic Male Sterility
![Page 12: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/12.jpg)
Avoiding self-pollination• Pollen sterility - genetically
engineeredCytoplasmic Male Sterility
![Page 13: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/13.jpg)
Avoiding self-pollination• Pollen sterility - genetically
engineeredCytoplasmic Male Sterility
![Page 14: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/14.jpg)
Sexual incompatibility
![Page 15: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/15.jpg)
Sexual incompatibility
• Often found in the following plant families:– Solanaceae (nightshade family)– Rosaceae (rose family)– Scrophulariaceae (snapdragon family)– Fabaceae (bean family)– Poaceae (grass family)
![Page 16: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/16.jpg)
Sexual incompatibility
• Examples in the rosaceae include:– Apples– Cherries– Plums
![Page 17: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/17.jpg)
Sexual incompatibility
• Pollen prevented from reaching ovule.
• Pollen either does not germinate on the stigma or the pollen tube is prevented from traveling down the transmitting cells in the style
![Page 18: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/18.jpg)
Sexual incompatibility
Normal pollen germination
Germinationprevented
![Page 19: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/19.jpg)
![Page 20: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/20.jpg)
![Page 21: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/21.jpg)
![Page 22: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/22.jpg)
Self-pollinating fruit trees
These include:
– Peaches
– Apricots
– Nectarines
![Page 23: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/23.jpg)
Flower types for cross-pollination
• Dioecy (dioecious plants)– Example: Holly
![Page 24: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/24.jpg)
Flower types for cross-pollination
• Dioecy (dioecious plants)– Example: Holly
![Page 25: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/25.jpg)
Flower types for cross-pollination
• Monoecy (monoecious plants)– Example: Corn
![Page 26: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/26.jpg)
Flower types for cross-pollination
• Dichogamy (monoecious plant flowering at different times)– Example: Squash
![Page 27: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/27.jpg)
Male flower appears a few days earlier than female flower
![Page 28: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/28.jpg)
Flower reproductive parts can be located away from each other
![Page 29: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/29.jpg)
Ecotype
• A plant that has evolved in relation to its surrounding habitat
• Ex. Pseudotsuga menziesii– Coastal douglas fir– Rocky Mountain Douglas fir
![Page 30: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/30.jpg)
Coastal Douglas fir
![Page 31: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/31.jpg)
Rocky Mountain Douglas fir
![Page 32: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/32.jpg)
Cline• A continuous variation in a species
• Ex. Acer rubrum (red maple)
![Page 33: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/33.jpg)
Provenance
The geographic area
where a plant is
native to.
![Page 34: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/34.jpg)
Controlling Genetic Variability
• Isolation
• Roguing
• Pure Stands
![Page 35: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/35.jpg)
Controlling Genetic Variability
• Isolation
• Roguing
• Pure Stands
![Page 36: Chapter 5 Seed Selection. Self-pollination Fixed traits (homozygous) = inbred](https://reader035.vdocument.in/reader035/viewer/2022062417/551a55095503463e778b5636/html5/thumbnails/36.jpg)
Controlling Genetic Variability
• Isolation
• Roguing
• Pure Stands