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Tomato chromosome 6: a high resolution map of the long arm and construction of a composite integrated marker-order map
- Source :
- Theoretical and Applied Genetics 92 (1996), Theoretical and Applied Genetics, 92, 1065-1072
- Publication Year :
- 1996
- Publisher :
- Springer Science and Business Media LLC, 1996.
-
Abstract
- Integration of molecular and classical genetic maps is an essential requirement for marker-assisted breeding, quantitative trait locus mapping and map-based cloning. With respects to tomato, such maps are only available for the top part of chromosome 1, for chromosome 3 and for the short arm and the centromere proximal part of the long arm of chromosome 6. Employing an L. esculentum line carrying an L. hirsutum introgression we constructed an integrated linkage map for the telomere proximal part of the long arm of tomato chromosome 6, thereby completing the integrated map published previously. With an average map distance of only 0.6 cM the map provides detailed information on the relative position of molecular markers and several traits of economical importance, such as the fruit color marker B. Furthermore, two additional crosses using lines containing L. pennellii introgressions were performed to address the question as to how the recombination frequency in a marked interval on the long arm of chromosome 6 is affected by introgressed segments from different origins. It is concluded that recombination is not merely affected by the local level of homology but also by surrounding sequences. Combination of all the linkage data generated in various crosses described in this and other studies enabled the construction of the first integrated map of an entire tomato chromosome. This map carries 42 loci and shows the position of 15 classical genes relative to 59 molecular markers.
- Subjects :
- Marker order map
Introgression
Instituut voor Agrotechnologisch Onderzoek
Biology
Laboratorium voor Erfelijkheidsleer
Genetic linkage map
Gene mapping
Genetic linkage
Centromere
Genetics
Laboratorium voor Moleculaire Biologie
Lycopersicon esculentum
Gene map
General Medicine
Recombination
Fruit colour
Telomere
Chromosome 3
Evolutionary biology
Genetic marker
Agrotechnological Research Institute
Laboratory of Genetics
Laboratory of Molecular Biology
EPS
Agronomy and Crop Science
Biotechnology
Subjects
Details
- ISSN :
- 14322242 and 00405752
- Volume :
- 92
- Database :
- OpenAIRE
- Journal :
- Theoretical and Applied Genetics
- Accession number :
- edsair.doi.dedup.....3d50bd776c6cc4b9c4510096a845705b