An intervarietal molecular marker map in Triticum aestivum L. Em. Thell. and comparison with a map from a wide cross |
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Authors: | T Cadalen C Boeuf S Bernard M Bernard |
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Institution: | (1) INRA, Station d’Amélioration des Plantes, Domaine de Crouelle, 63039 Clermont-Ferrand Cedex 2, France, FR |
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Abstract: | An intervarietal molecular marker map covering most of the nuclear genome was developed in Triticum aestivum. One hundred and six androgenetic-derived doubled haploid lines obtained from the F1 between monosomics of ‘Chinese Spring’ and ‘Courtot’ were analysed for genetic mapping. The map covered 18 of the 21 chromosomes
with an identical distribution of markers in the A and B genome, and only small segments of the D genome. Distorted markers
were mapped using Bailey’s 2-point method and revealed skewed regions on 1A, 1DS, 2A, 2B, 4AS and 6B. Comparison with a wide
cross ‘Opata’×Synthetic hexaploid (T. tauschii/‘Altar 84’)] showed colinearity for markers on homologous chromosomes, but revealed a large proportion (25%) of markers mapped
on non-homoeologous chromosomes, i. e. heterologous markers. The origin of the material and distortion segregation are discussed
with particular emphasis on investigations of D-genome markers.
Received: 2 May 1996 / Accepted: 2 August 1996 |
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Keywords: | Triticum aestivum Doubled haploids Intervarietal map Distortion segregation Genetic map comparison |
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