1. Unit 2 Plants for Food and Fibre

2. Plant Reproduction and Breeding
Topic 3
Plant Reproduction
and Breeding

3. POS - selective breeding - plant propagation and reproduction
 describe life cycles of seed plants, and identify example methods used to ensure their germination, growth and reproduction (e.g.,describe propagation of plants from seeds and vegetative techniques,such ascuttings;conduct a germination study; describe the useof beehives to support pollination)

4. Brainstorm-How do plants reproduce?

5. Plant some seeds!

6. Reproduction Types Sexual Asexual (Vegetative) Selective reproduction:
When humans choose characteristics and encourage plants to reproduce
Genetic engineering/genetically modified

7. Selective reproduction
What types of features would be desirable?
Apples
Flowers
corn

8. Asexual Reproduction
Method where the new “baby” plant will be genetically identical to the “parent” plant
(cloning, dolly the sheep brainpop)

9. Asexual Reproduction Methods: Problems with Asexual reproduction:
Grafting: removal of a branch, attach to a host
Cutting: sever the stem, place in water or soil where it will grow roots
Layering: bury a piece of stem, new roots will grow
Problems with Asexual reproduction:
Vulnerable to disease as there is no genetic variation

10. Cutting

11. Grafting

12. Layering

13. Strawberry runners

15. Bulbs

16. Trembling Aspens-asexual

17. Sexual Reproduction
Pollination: is a type of reproduction where the new plant will be a combination of both parent plants, and genetically unique
Methods:
Cones (gymnosperms-evergreens)
Flowers (angiosperms)
Benefit: able to adapt to changes in the environment

18. Agricultural benefit!
Farmers purposely keep beehives in their fields to encourage pollination of their crops

19. Pollination
By wind
By birds, insects

21. Male + Female cones

22. Flowers

23. Parts of a flower- pg 122

25. Germination

26. Assignment Draw the diagram
of the parts of a flower on page 122 in your journal
Of pollination page 124
Of a seed pg 125
Germination pg 128