Tomato chromosome 6: effect of alien chromosomal segments on recombinant frequencies
| Autor: | M.F. van Wordragen, Maarten Koornneef, P. Zabel, T. Liharska, A. van Kammen |
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| Jazyk: | angličtina |
| Rok vydání: | 1996 |
| Předmět: |
Centromere
Introgression Chromosomal translocation Instituut voor Agrotechnologisch Onderzoek Biology Laboratorium voor Erfelijkheidsleer Lycopersicon Introgressions Recombinant frequency Genotype Genetics Laboratorium voor Moleculaire Biologie Lycopersicon esculentum Molecular Biology food and beverages Chromosome General Medicine biology.organism_classification Genetic marker Morphological markers Agrotechnological Research Institute Laboratory of Genetics Laboratory of Molecular Biology EPS Recombination Biotechnology |
| Zdroj: | Genome 39 (1996) Scopus-Elsevier Genome, 39, 485-491 |
| ISSN: | 0831-2796 |
| Popis: | Variation in recombinant frequencies at two adjacent intervals on chromosome 6 of tomato (Lycopersicon esculentum Mill.) has been studied in seven lines that differ in the amount and origin of introgressed segments from wild species. These lines were all crossed to a genotype homozygous recessive for the markers tl, yv, and c, which define the centromere spanning region tl–yv and the long arm region yv–c. Recombinants were identified in large F2, populations consisting of over 30 000 plants in total. Application of molecular markers provided additional information on the distribution of crossover events within the centromere-containing interval tl–yv. A decrease in recombination at the marked intervals correlated with the presence of an alien segment. Suppression of recombination was up to sixfold in the centromere spanning interval tl–yv depending on the source and size of the introgression, and was restricted to the alien segments with no strong effect on the neighbouring intervals. Key words : recombinant frequency, Lycopersicon esculentum, morphological markers, introgressions, centromere. |
| Databáze: | OpenAIRE |
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