In:
Proceedings of the National Academy of Sciences, Proceedings of the National Academy of Sciences, Vol. 98, No. 9 ( 2001-04-24), p. 5217-5221
Abstract:
Allelic association between pairs of loci is derived in terms
of the association probability ρ as a function of recombination θ, effective population size N , linear systematic pressure v , and time t , predicting both
ρ rt , the decrease of association from
founders and ρ ct , the increase by genetic
drift, with ρ t =
ρ rt + ρ ct .
These results conform to the Malecot equation, with time replaced by distance on the genetic map, or on the physical map if recombination in
the region is uniform. Earlier evidence suggested that ρ is less sensitive to variations in marker allele frequencies than alternative
metrics for which there is no probability theory. This robustness is confirmed for six alternatives in eight samples. In none of these 48
tests was the residual variance as small as for ρ. Overall, efficiency was less than 80% for all alternatives, and less than 30%
for two of them. Efficiency of alternatives did not increase when information was estimated simultaneously. The swept radius within which
substantial values of ρ are conserved lies between 385 and 893 kb, but deviation of parameters between measures is enormously significant.
The large effort now being devoted to allelic association has little value unless the ρ metric with the strongest theoretical basis and
least sensitivity to marker allele frequencies is used for mapping of marker association and localization of disease loci.
Type of Medium:
Online Resource
ISSN:
0027-8424
,
1091-6490
DOI:
10.1073/pnas.091062198
Language:
English
Publisher:
Proceedings of the National Academy of Sciences
Publication Date:
2001
detail.hit.zdb_id:
209104-5
detail.hit.zdb_id:
1461794-8
SSG:
11
SSG:
12
