EVOLUTION OF MATING SYSTEMS IN LYCOPERSICON-HIRSUTUM AS DEDUCED FROM GENETIC-VARIATION IN ELECTROPHORETIC AND MORPHOLOGICAL CHARACTERS

被引:84
作者
RICK, CM
FOBES, JF
TANKSLEY, SD
机构
[1] Department of Vegetable Crops, University of California, Davis, 95616, California
[2] Department of Horticulture, Michigan State University, East Lansing, 48824, Michigan
关键词
Allozymes; clinal variation; electrophoresis; evolution of mating systems; isozymes; Lycopersicon hirsutum; self-incompatibility; Solanaceae;
D O I
10.1007/BF00982390
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Populations in the central part of the distribution are mostly self-incompatible and tend to be highly variable for allozymic and morphological characters; those in the north and south limits are entirely self-compatible and tend to be genetically highly uniform. Gradations in variability are observed in the intermediate regions. Flower size tends to diminish in the peripheral areas. The extensive differences in genotype observed between the north and south marginal populations are not compatible with the concept of a single origin of self-compatibility, but suggest, along with other evidence, that the substitution of different alleles resulted from differentiation in the marginal areas from older, self-incompatible stocks of the central region. The conclusions regarding patterns of genetic variation and nature of evolution of mating systems in L. hirsutum conform to a remarkable extent with those reached previously for L. pimpinellifolium, a species that is distinct in morphology and ecological preferences yet has a similar latitudinal distribution. © 1979 Springer-Verlag.
引用
收藏
页码:279 / 298
页数:20
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