FLUCTUATING ASYMMETRY IN THE MUS MUSCULUS HYBRID ZONE - A HETEROTIC EFFECT IN DISRUPTED CO-ADAPTED GENOMES

被引:71
作者
ALIBERT, P [1 ]
RENAUD, S [1 ]
DOD, B [1 ]
BONHOMME, F [1 ]
AUFFRAY, JC [1 ]
机构
[1] UNIV MONTPELLIER 2, GENOME & POPULAT LAB, CNRS, URA 1493, F-34095 MONTPELLIER 5, FRANCE
关键词
D O I
10.1098/rspb.1994.0141
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Developmental stability reflects the organism's ability to buffer minor developmental accidents and is often estimated by measuring the fluctuating asymmetry. Either implicitly or explicitly, numerous authors have assumed that developmental stability is correlated with overall fitness. If this is the case, changes in morphological asymmetry across a hybrid zone could be used as a measure of the selection on hybrid genomes. Developmental stability in hybrid populations is theoretically related to the genetic distance between hybridizing taxa, and results from a balance between the stabilizing effect due to increased heterozygosity and the disruptive effect caused by breakdown of genomic co-adaptation. Here we have compared the amount of fluctuating asymmetry across a transect of the hybrid zone between the two European subspecies of the house mouse (Mus musculus domesticus and M. m. musculus) in Denmark. For the first time in any natural hybrid zone we found an increased developmental stability in the populations with mixed genomes. Moreover, the apparently beneficial effect of hybridization on the developmental stability of the hybrid mice contrasts with the results of both genetic and parasitological studies which show that hybrid dysgenesis occurs in this zone. Our results suggest that the barrier to gene flow in the Mus musculus hybrid zone may result from the disruption of relatively few gene systems. They also lead us to reassess the relation between developmental stability expressed as fluctuating asymmetry, coadaptation and overall fitness.
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页码:53 / 59
页数:7
相关论文
共 54 条
[1]  
[Anonymous], GENETICS ORIGIN SPEC
[2]   WHEN DID THE HOUSE MOUSE COLONIZE EUROPE [J].
AUFFRAY, JC ;
BRITTONDAVIDIAN, J .
BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY, 1992, 45 (02) :187-190
[3]   THE HOUSE MOUSE PROGRESSION IN EURASIA - A PALEONTOLOGICAL AND ARCHAEOZOOLOGICAL APPROACH [J].
AUFFRAY, JC ;
VANLERBERGHE, F ;
BRITTONDAVIDIAN, J .
BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY, 1990, 41 (1-3) :13-25
[4]  
BADER RS, 1965, GROWTH, V29, P291
[5]   ANALYSIS OF HYBRID ZONES [J].
BARTON, NH ;
HEWITT, GM .
ANNUAL REVIEW OF ECOLOGY AND SYSTEMATICS, 1985, 16 :113-148
[6]   ADAPTATION, SPECIATION AND HYBRID ZONES [J].
BARTON, NH ;
HEWITT, GM .
NATURE, 1989, 341 (6242) :497-503
[7]  
BARTON NH, 1979, HEREDITY, V43, P341, DOI 10.1038/hdy.1979.87
[8]  
BARTON NH, 1993, HYBRID ZONES AND THE EVOLUTIONARY PROCESS, P13
[9]   THE EVOLUTION OF HOUSE MICE [J].
BOURSOT, P ;
AUFFRAY, JC ;
BRITTONDAVIDIAN, J ;
BONHOMME, F .
ANNUAL REVIEW OF ECOLOGY AND SYSTEMATICS, 1993, 24 :119-152
[10]   THE GENETIC-BASIS OF DEVELOPMENTAL STABILITY .1. RELATIONSHIPS BETWEEN STABILITY, HETEROZYGOSITY AND GENOMIC COADAPTATION [J].
CLARKE, GM .
GENETICA, 1993, 89 (1-3) :15-23