Recombination mapping of some chromosome 1A-, 1B-, 1D- and 6B-controlled gliadins and low-molecular-weight glutenin subunits in common wheat |
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Authors: | E V Metakovsky G Branlard V M Chernakov V P Upelniek R Redaelli N E Pogna |
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Institution: | (1) Istituto Sperimentale per la Cerealicoltura, via Mulino, 3, 20079 S. Angelo Lodigiano (Milano) Italy, IT;(2) INRA Station d’Amelioration des Plantes, Domaine de Crouelle, 63039 Clermont-Ferrand CEDEX 02 France, FR;(3) N. I. Vavilov Institute of General Genetics, Gubkin St., 3, Moscow, B-333, Russia, RU;(4) Sezione di Genetica Applicata, Istituto Sperimentale per la Cerealicoltura, via Cassia 176, 001000, Roma, Italy, IT |
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Abstract: | Inheritance of low-molecular-weight glutenin subunits (LMW GS) and gliadins was studied in the segregating progeny from several
crosses between common wheat genotypes. The occurrence of a few recombinants in the F2 grains of the cross Skorospelka Uluchshennaya×Kharkovskaya 6 could be accounted for by assuming that the short arm of chromosome
1D contains two tightly linked loci each coding for at least one gliadin plus one C-type LMW GS. These loci were found to
recombine at a frequency of about 2%, and to be linked to the Glu-D3 locus coding for B-type LMW GS. Some proteins showing biochemical characteristics of D-type or C-type LMW GS were found to
be encoded by the Gli-B1 and Gli-B2 loci, respectively. Strongly stained B-type LMW GS in cvs Skorospelka Uluchshennaya and Richelle were assigned to the Glu-B3 locus, but recombination between this locus and Gli-B1 was not found. Analogously, in the cross Bezostaya 1×Anda, no recombination was found between Gli-A1 and Glu-A3, suggesting the maximum genetic distance between these loci to be 0.97% (P=0.05). A B-type LMW GS in cv Kharkovskaya 6 was assigned to the Glu-B2 locus, with about 25% recombination from the Gli-B1 locus. The present results suggested that alleles at Gli loci may relate to dough quality and serve as genetic markers of certain LMW GS affecting breadmaking quality.
Received: 9 July 1996/Accepted: 15 November 1996 |
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Keywords: | Wheat Gliadin Low-molecular-weight glutenins Recombination |
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