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Doug Cook Seminar
UC Davis, Dept. of Plant Pathology, “Studies of Genome Evolution in Plants and Applications in the Developing World”
| What | |
|---|---|
| When |
2009-10-09 12:00
2009-10-09 13:00
2009-10-09 from 12:00 to 13:00 |
| Where | RRI 101 |
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Host: Sergey Nuzhdin
1 talk log
1.1 symbiosis of Medicargo (legume) and Rhizobium
nodulation occurs in root hair
chemical communication. plant secretes a chemical, bacteria senses it and secretes a molecule (nod factor), host-specific, to infect the plant.
Mycorrihization factors (fixture of phosphorus) share the pathway with nodulation
DMI1/2/3 => calcium spiking
ethylene (SKL) regulates calcium spiking
why didn't rhizobia transfer its genes into plant genome and plant can fix nitrogen by itself?
1.2 comparative genomics ~10 species
wide-cross reference => build map. domestication => lowers the diversity in the crop. use wild type to get polymorphism
slow-evolving genes: orthologous genes 500s
fast-evolving: disease resistance 4400s
discovery of SNPs => illumina golden gate (parallel genotyping) 1400s conserved genes
NBS-LRR disease resistance genes
domestication induces strong bottleneck, makes the crop worse (grant underway). which genes get fixed?
Gene Regulatory Networks Special Feature (PNAS)