TY - JOUR
T1 - Two-locus autosomal sex determination
T2 - On the evolutionary genetic stability of the even sex ratio
AU - Liberman, Uri
AU - Feldman, Marcus W.
AU - Eshel, Ilan
AU - Otto, Sarah P.
PY - 1990/3
Y1 - 1990/3
N2 - In two-locus models of sex determination, there are two kinds of interior (polymorphic) equilibria. One class has the even sex ratio, and the other has equal allele frequencies in the two sexes. Equilibria of the second class may exhibit linkage disequilibrium. The condition for external stability of these second-class equilibria to invasion by a new allele is that the appropriately averaged sex ratio near the equilibrium be moved closer to the even sex ratio than the average among the resident genotypes. However, invasion by a new chromosome depends on the recombination fraction in a way that appears to preclude general results about the evolutionary genetic stability of the even sex ratio in this situation.
AB - In two-locus models of sex determination, there are two kinds of interior (polymorphic) equilibria. One class has the even sex ratio, and the other has equal allele frequencies in the two sexes. Equilibria of the second class may exhibit linkage disequilibrium. The condition for external stability of these second-class equilibria to invasion by a new allele is that the appropriately averaged sex ratio near the equilibrium be moved closer to the even sex ratio than the average among the resident genotypes. However, invasion by a new chromosome depends on the recombination fraction in a way that appears to preclude general results about the evolutionary genetic stability of the even sex ratio in this situation.
KW - Classes of polymorphisms
KW - Linkage
KW - Long-term evaluation
KW - Population-genetic models
UR - http://www.scopus.com/inward/record.url?scp=0025237787&partnerID=8YFLogxK
U2 - 10.1073/pnas.87.5.2013
DO - 10.1073/pnas.87.5.2013
M3 - ???researchoutput.researchoutputtypes.contributiontojournal.article???
AN - SCOPUS:0025237787
SN - 0027-8424
VL - 87
SP - 2013
EP - 2017
JO - Proceedings of the National Academy of Sciences of the United States of America
JF - Proceedings of the National Academy of Sciences of the United States of America
IS - 5
ER -