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Details of Award

NERC Reference : NER/B/S/2003/00859

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The immiscibility genomes in hybridizing populations of Podisma pedestris.

Grant Award

Principal Investigator:
Professor RA Nichols, Queen Mary University of London, Sch of Biological and Chemical Sciences
Grant held at:
Queen Mary University of London, Sch of Biological and Chemical Sciences
Science Area:
Terrestrial
Overall Classification:
Terrestrial
Science Classification details
ENRIs:
Natural Resource Management
Biodiversity
Science Topics:
Palaeobiology
Population Genetics/Evolution
Population Ecology
Abstract:
There are spectacular differences in the genome sizes of Podisma pedestris (a grasshopper) from populations only 800m apart in the French Alps. Although the two forms have been connected by interbreeding populations for over 8,000 years the two genome sizes can still be discerned in the same population from the middle of the transition. In contrast, most genetic markers show no differentiation across this zone, nor evidence for linkage disequilibrium within it. The only known exception is r DNA, which shows a similar transition and linkage disequilibrium to DNA content. This discrepancy between rDNA and other parts of the genome has escaped explanation for over 20 years. Only in the last year have new results provided strong leads. The proposal is to follow up that breakthrough, with the expectation that the results will form the foundation for a 3-year standard grant. The interpretation of the interplay between selection and recombination in the Podisma zone has been widely influential in the development of fundamental theory about reproductive isolation and speciation. The new results will, therefore, be important in understanding three diverse areas: the evolution of Y-chromosomes, the extraordinary lability of the Podisma genome size and, more generally, the divergence between genomes that may be the first steps towards speciation.
Period of Award:
1 Feb 2005 - 31 Oct 2005
Value:
£30,825
(FY details)
Authorised funds only
NERC Reference:
NER/B/S/2003/00859
Grant Stage:
Completed
Scheme:
Small Grants Pre FEC
Grant Status:
Closed
Programme:
Small Grants

This grant award has a total value of £30,825  

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FDAB - Financial Details (Award breakdown by headings)

Total - StaffTotal - T&STotal - Other CostsTotal - Indirect Costs
£14,304£2,358£7,586£6,580

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