Structural organization of the group-1 chromosomes of two bread wheat sister lines.
Eureka and Renan are two French bread wheat cultivars derived from a 4-way cross. Using molecular markers (essentially RFLPs), we studied the structure of the group-1 chromosomes of these two genotypes, their parents and a doubled-haploid (DH) population derived from their F(1). Using the DH population (102 lines), a molecular map of the three homoeologous group-1 chromosomes was produced and compared with the map established on another intervarietal cross: Courtot x Chinese Spring (Cadalen et al. 1997). The polymorphic markers were mapped on the DH population and characterized on the four grand-parents, allowing us to compare the structural organization of the group-1 chromosomes of Eureka and Renan and determine their origin. These chromosomes were very different, except for small regions (1AL proximal and 1BL distal) which were identical.
Boeuf
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UMR INRA-UBP Amélioration et Santé des Plantes, 234 avenue du Brezet, 63039 Clermont-Ferrand Cedex 2. France. Christiane.Boeuf@clermont.inra.fr
Prodanovic
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Gay
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Bernard
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D005075:Biological Evolution; D002874:Chromosome Mapping; D018895:Microsatellite Repeats; D011110:Polymorphism, Genetic; D014908:Triticum / Q000235:genetics*