1. Chapter 5 Seed Selection

2. Self-pollination Fixed traits (homozygous) = inbred

3. Self-Pollination Non-inbred Inbred 1x Inbred 2x

4. Cross-pollination Fixed traits (homozygous) = inbred

5. Controlled crosses

8. Cross-Pollination & hybrid vigor B73 B73 x Mo17 Mo17

9. Cross-Pollination & hybrid vigor B73 Mo17 B73 x Mo17

10. Avoiding self-pollination Pollen sterility - genetically engineered Cytoplasmic Male Sterility

11. Avoiding self-pollination Pollen sterility - genetically engineered Cytoplasmic Male Sterility

12. Avoiding self-pollination Pollen sterility - genetically engineered Cytoplasmic Male Sterility

13. Avoiding self-pollination Pollen sterility - genetically engineered Cytoplasmic Male Sterility

14. Sexual incompatibility

15. Often found in the following plant families: –Solanaceae (nightshade family) –Rosaceae (rose family) –Scrophulariaceae (snapdragon family) –Fabaceae (bean family) –Poaceae (grass family)

16. Sexual incompatibility Examples in the rosaceae include: –Apples –Cherries –Plums

17. 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

18. Sexual incompatibility Normal pollen germination Germination prevented

22. Self-pollinating fruit trees These include: –Peaches –Apricots –Nectarines

23. Flower types for cross-pollination Dioecy (dioecious plants) –Example: Holly

24. Flower types for cross-pollination Dioecy (dioecious plants) –Example: Holly

25. Flower types for cross-pollination Monoecy (monoecious plants) –Example: Corn

26. Flower types for cross-pollination Dichogamy (monoecious plant flowering at different times) –Example: Squash

27. Male flower appears a few days earlier than female flower

28. Flower reproductive parts can be located away from each other

29. Ecotype A plant that has evolved in relation to its surrounding habitat Ex. Pseudotsuga menziesii –Coastal douglas fir –Rocky Mountain Douglas fir

30. Coastal Douglas fir

31. Rocky Mountain Douglas fir

32. Cline A continuous variation in a species Ex. Acer rubrum (red maple)

33. Provenance The geographic area where a plant is native to.

34. Controlling Genetic Variability Isolation Roguing Pure Stands

35. Controlling Genetic Variability Isolation Roguing Pure Stands

36. Controlling Genetic Variability Isolation Roguing Pure Stands