13741135
Description
Flashcards by J yadonknow, updated more than 1 year ago
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Created by J yadonknow
over 6 years ago
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| Question | Answer |
| The green revolution | Planned international effort in 1970 to ^ crop yield |
| How? (4) | New crop cultivars Irrigation Fertiliser Pesticides |
| Global pop by 2100 | 9 billion |
| Effect of TGR | Chronic hunger reduced from 40% to 20% Saved millions of hectares from cultivation |
| How did it achieve (4) | more crop cycle per year Semi-dwarf habit Disease resistance Increased adaptability to local condition |
| Crop disease examples | wheat rust, rice blast |
| Increased adaptability to environment example | IR8 rice |
| What is meant by semi-dwarf habit? | strong stem means less lodging High yield |
| Micropropagation | Meristem in sterile culture to produce GI |
| Problem | Susceptible to disease, all susceptible |
| Plant tissue culture 2: Elim of systemic viruses: | Virus infects plant, can't infect meristem Sterile culture of meristem eliminates virus |
| Molecular breeding useful for | Speeding up fruit true breeding Identify seedlings w desirable trait via DNA markers |
| How to find markers | Generate fingerprint of parent plant using AFLPs or genome sequencing |
| More tricks to speed up plant breeding (2) | Protoplast fusion Embryo rescue |
| Anti-cancer drug from plants example | Taxol from pacific yew tree |
| Using bacteria for vector of transgenes | Agrobacterium tumefaciens has a gene that encodes cytokinin |
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