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| ABRUPT CLINE FOR SEX-CHROMOSOMES IN A HYBRID ZONE BETWEEN 2 SPECIES OF MICE |
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| Author(s): TUCKER PK, SAGE RD, WARNER J, WILSON AC, EICHER EM |
| Source: EVOLUTION Volume: 46 Issue: 4 Pages: 1146-1163 Published: AUG 1992 |
| Times Cited: 78 References: 46 |
| Abstract: We compared the patterns of movement of sex chromosomal and autosomal loci along a 160 km transect across a zone of hybridization between M. domesticus and M. musculus in southern Germany and western Austria using seven genetic markers. These included one Y-specific DNA sequence (YB10), two X-specific loci (DXWas68 and DXWas31), and four autosomal isozyme loci (Es-10, Es-1, Mpi-1, and Np-1). Random effects logistic regression analysis enabled us to examine the relationship between M. domesticus allele frequency and geographic distance from the western edge of the hybrid zone and allowed statistical evaluation of differences in cline midpoint and width among loci. More limited movement was observed for all three sex chromosomal markers across the zone compared with three of the four autosomal markers. If differential movement reflects fitness differences of specific alleles (or alleles at closely linked loci) on a hybrid background, then alleles that move to a limited extent across a hybrid zone may contribute to hybrid breakdown between two species. The limited flow of both X- and Y-specific alleles suggest that sex chromosomes have played an important role in Mus speciation. |
| Document Type: Article |
| Language: English |
| Reprint Address: TUCKER, PK (reprint author), JACKSON LAB, BAR HARBOR, ME 04609 USA |
Addresses:
1. UNIV MICHIGAN, DEPT BIOL, ANN ARBOR, MI 48109 USA
2. UNIV MICHIGAN, MUSEUM ZOOL, ANN ARBOR, MI 48109 USA
3. UNIV CALIF BERKELEY, DIV BIOCHEM & MOLEC BIOL, BERKELEY, CA 94720 USA
4. UNIV MICHIGAN, MUSEUM VERTEBRATE ZOOL, ANN ARBOR, MI 48109 USA
5. UNIV MICHIGAN, CTR STAT CONSULTAT & RES, ANN ARBOR, MI 48109 USA |
| Publisher: SOC STUDY EVOLUTION, 810 E 10TH STREET, LAWRENCE, KS 66044 |
| Subject Category: Ecology; Evolutionary Biology; Genetics & Heredity |
| IDS Number: JK169 |
| ISSN: 0014-3820 |
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