Molecular marker systems for Oenothera genetics.
The genus Oenothera has an outstanding scientific tradition. It has been a model for studying aspects of chromosome evolution and speciation, including the impact of plastid nuclear co-evolution. A large collection of strains analyzed during a century of experimental work and unique genetic possibilities allow the exchange of genetically definable plastids, individual or multiple chromosomes, and/or entire haploid genomes (Renner complexes) between species. However, molecular genetic approaches for the genus are largely lacking. In this study, we describe the development of efficient PCR-based marker systems for both the nuclear genome and the plastome. They allow distinguishing individual chromosomes, Renner complexes, plastomes, and subplastomes. We demonstrate their application by monitoring interspecific exchanges of genomes, chromosome pairs, and/or plastids during crossing programs, e.g., to produce plastome-genome incompatible hybrids. Using an appropriate partial permanent translocation heterozygous hybrid, linkage group 7 of the molecular map could be assigned to chromosome 9.8 of the classical Oenothera map. Finally, we provide the first direct molecular evidence that homologous recombination and free segregation of chromosomes in permanent translocation heterozygous strains is suppressed.
Rauwolf
Uwe
U
Ludwig-Maximilians-Universität München, Lehrstuhl für Botanik, Department Biologie I, Munich, Germany.
Golczyk
Hieronim
H
Meurer
Jörg
J
Herrmann
Reinhold G
RG
Greiner
Stephan
S
D002467:Cell Nucleus / Q000235:genetics; D002874:Chromosome Mapping; D032461:Chromosomes, Plant / Q000235:genetics*; D018744:DNA, Plant / Q000235:genetics; D005819:Genetic Markers / Q000235:genetics*; D018745:Genome, Plant / Q000235:genetics; D054627:Genome, Plastid / Q000235:genetics; D005838:Genotype; D008969:Molecular Sequence Data; D031664:Oenothera / Q000235:genetics* / Q000254:growth & development; D018087:Plastids / Q000235:genetics*; D011995:Recombination, Genetic
D018744:DNA, Plant; D005819:Genetic Markers
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