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TO WHAT EXTENT DO DIFFERENT TYPES OF SEX RATIO DISTORTERS INTERFERE?
- Source :
- Evolution; Oct2004, Vol. 58 Issue 10, p2382-2386, 5p, 2 Graphs
- Publication Year :
- 2004
-
Abstract
- Within the Diptera, two different selfish genetic elements are known to cause the production of female-biased sex ratios: maternally inherited bacteria that kill male zygotes (male-killers), and X chromosomes causing the degeneration of Y-bearing sperm in males (meiotic drive). We here develop a mathematical model for the dynamics of these two sex-ratio distorters where they co-occur. We show that X chromosome meiotic drive elements can be expected to substantially lower the equilibrium frequency of male-killers and can even lead to their extinction. Conversely, male-killers can also decrease the equilibrium frequency of X drivers and cause their extinction. Thus, we predict that there will be some complementarity in the incidence of X chromosome meiotic drive and male-killing in natural populations, with a lower than expected number of species bearing both elements. [ABSTRACT FROM AUTHOR]
- Subjects :
- DIPTERA
GENETICS
SEX ratio
BACTERIA
X chromosome
Subjects
Details
- Language :
- English
- ISSN :
- 00143820
- Volume :
- 58
- Issue :
- 10
- Database :
- Complementary Index
- Journal :
- Evolution
- Publication Type :
- Academic Journal
- Accession number :
- 14981443