Mapping of genes controlling seed storage-proteins and cytological markers on chromosome 1R of rye
1992
Orellana, J. (Politecnica Univ., Madrid (Spain). Dept. de Genetica. Escuela Tecnica Superior de Ingenieros Agronomos) | Fernandez-Calvin, F. | Vazquez, J.F. | Carrillo, J.M.
Rye secalins, telomeric C-bands, and telocentric chromosomes were used as markers in the progeny of a test-cross in order to determine the position of seed storage-protein genes Glu-R1 and Gli-R1 with respect to the centromere and both telomeres of chromosome 1R in rye. These genes were linked to the centromere (32.35/+-/3.28 % and 36.27/+-/3.37 % recombination, respectively). Glu-R1 was loosely linked to the telomere of the long arm (43.63/+-/3.47 % recombination), while Gli-R1 was closely linked to the telomere of the short arm (9.80/+-/2.08 % recombination). This finding supports the possibility that rye omega- and gamma-secalin genes may be located on the satellites, as has been described in wheat for genes that code similar proteins. The importance of metaphase-1 pairing failure and its consequences for the estimation of the recombination fraction are also discussed.
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