Erstellt von J yadonknow
vor mehr als 6 Jahre
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Frage | Antworten |
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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