We develop coalescent models for autotetraploid species with tetrasomic inheritance. We show that the ancestral genetic process in a large population without recombination may be approximated using Kingman's standard coalescent, with a coalescent effective population size 4N. Numerical results suggest that this approximation is accurate for population sizes on the order of hundreds of individua...

Discrimination between disomic and tetrasomic inheritance aids in determining whether tetraploids originated by allotetraploidy or autotetraploidy, respectively. Past assessments of inheritance in tetraploids have used analyses whereby each inheritance hypothesis is tested independently. I present a Bayesian analysis that is appropriate for discriminating among several inheritance hypotheses an...

Fisher (1947) and Bailey (1961) considered a two-locus tetrasomic model and exploited the basic features of genetic segregation and linkage of tetrasomic inheritance. They attempted to establish the relationship between the model parameters (the coefficients of double reduction at two linked loci, say α and β respectively, and recombination frequency between them, r) and frequencies of gamete m...

Evidence of tetrasomic inheritance in alfalfa, Medicago sativa L. and M . falcata L., for multiple codominant alleles at three isozymic loci is reported in this study. The locus Prx-I governing anodal peroxidase and the loci Lap-I and L a p 2 governing anodal leucine-aminopeptidase were studied by starch gel electrophoresis in seedling root tissue or seeds. The progenies from several di-, trior...

We report 13 polymorphic nuclear microsatellite loci for Neochamaelea pulverulenta (Cneoraceae) using an enriched-library approach. Although this plant species is tetraploid, expected patterns for tetrasomic segregation were completely absent, and all loci analysed showed a diploid pattern of inheritance. We detected a total of 102 alleles in 57 individuals genotyped (mean number of alleles per...

Diploid clones of the hybrid acacia (Acacia mangium × A. auriculiformis) are widely planted in Vietnam because their high productivity, adaptability, and commercial wood yields. Polyploid breeding offers possibilities for further enhancing vigor generating new value genotypes. In a field trial, we compared three diploid with respective colchicine-induced tetraploid lines. Flowering seed product...

Polyploidy is a common phenomenon occurring in a vast number of land plants. Investigations of patterns of inheritance and the origins of plants (i.e., autopolyploidy vs. allopolyploidy) usually involve cytogenetic and molecular studies of chromosome pairing, chromosome mapping, and marker segregation analysis through experimental crosses and progeny tests. Such studies are missing for most wil...