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| DIVERGENCE OF MEIOTIC DRIVE-SUPPRESSION SYSTEMS AS AN EXPLANATION FOR SEX-BIASED HYBRID STERILITY AND INVIABILITY |
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| Author(s): FRANK SA |
| Source: EVOLUTION Volume: 45 Issue: 2 Pages: 262-267 Published: MAR 1991 |
| Times Cited: 108 References: 37 |
| Abstract: Two empirical generalizations about speciation remain unexplained: the tendency of the heterogametic sex to be sterile or inviable in F1 hybrids (Haldane's rule), and the tendency of the X chromosome to harbor the genetic elements that cause this sex bias in hybrid fitness. I suggest that divergence of meiotic drive systems on the sex chromosomes can explain these observations. The theory follows from two simple facts. First, sex chromosomes are particularly susceptible to the forces of meiotic drive. Second, divergence of meiotic drive systems can cause hybrid sterility and inviability. The main objection to the theory is that meiotic drive is apparently rare, whereas the observed pattern of hybrid fitness is widespread. I answer this objection by showing that divergence of meiotic drive systems can explain the two generalizations even if large departures from Mendelian segregation are rarely observed. |
| Document Type: Article |
| Language: English |
| Reprint Address: FRANK, SA (reprint author), UNIV CALIF IRVINE, DEPT ECOL & EVOLUT BIOL, IRVINE, CA 92717 USA |
| Publisher: SOC STUDY EVOLUTION, 810 E 10TH STREET, LAWRENCE, KS 66044 |
| Subject Category: Ecology; Evolutionary Biology; Genetics & Heredity |
| IDS Number: FL114 |
| ISSN: 0014-3820 |
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| | | | | | | | | Record from Web of Science® | | | | | | | | | |