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Microsatellites, or short tandem repeats, are abundant across genomes of most organisms. It is evident that the most straightforward and conclusive way of studying mutations in microsatellite-containing loci is to use clonally transmitted genomes or DNA sequences inherited in multigeneration...
Identification of the genes that underlie reproductive isolation provides important insights into the process of speciation. According to the Dobzhansky–Muller model, these genes suffer disrupted interactions in hybrids due to independent divergence in separate populations. In hybrid...
We investigated quantitative trait loci (QTLs) for several leaf chemistry traits in early-generation hybrids between Helianthus annuus and Helianthus petiolaris , the parental species of the ancient diploid hybrid sunflower species Helianthus anomalus, Helianthus deserticola , and Helianthus...
I compare the genetic basis of quantitative traits that potentially contribute to pre- and postzygotic isolation between the plant species Solanum lycopersicum (formerly Lycopersicon esculentum ) and Solanum habrochaites (formerly Lycopersicon hirsutum ), using quantitative trait loci (QTL)...
Allopolyploidy is a prominent mode of speciation in flowering plants. On allopolyploidy, genomic changes can take place, including chromosomal rearrangement and changes in gene expression; these processes continue over evolutionary time. Recent studies of gene expression in polyploid and hybrid...
In order to detect introgression of other Alectoris genus species into wild populations of Spanish Alectoris rufa , we studied a sample of 93 red-legged partridges (supposed to be A. rufa ) captured in the island of Majorca. A set of 31 chukar partridges ( Alectoris chukar) from Cyprus and 33...
Mutant genes, reduced culm number 1 ( rcn1 ) and bunketsuwaito tillering dwarf ( d3 ), affect tiller number in rice ( Oryza sativa L.) in opposite directions. The d3 mutant was reported to increase tiller number and reduce plant stature. Our objective was to compare the phenotype of the d3rcn1...
Polyploidy is well recognized as a major force in plant speciation. Among the polyploids in nature, allopolyploids are preponderant and include important crop plants like bread wheat, Triticum aestivum L. (2 n = 6 x = 42; AABBDD genomes). Allopolyploidy must result through concomitant or...
The closest wild relatives of maize, Zea mays ssp. mays are various Zea taxa known as “teosinte.” Hybrids between maize and the teosinte taxon, Zea mays ssp. mexicana , often occur when the 2 are sympatric in Mexico. Measuring the spontaneous hybridization rate of the 2 taxa would shed light...
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