Mapping of genes controlling seed storage-proteins and cytological markers on chromosome 1R of rye |
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Authors: | J. Orellana B. Fernández-Calvín J. F. Vázquez J. M. Carrillo |
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Affiliation: | (1) Departamento de Genética, Escuela Técnica Superior de Ingenieros Agrónomos, Universidad Politécnica, 28040 Madrid, Spain |
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Abstract: | Summary 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 1 R 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 - and -secalin genes may be located on the satellites, as has been described in wheat for genes that code similar proteins. The importance of metaphase-I pairing failure and its consequences for the estimation of the recombination fraction are also discussed. |
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Keywords: | Rye Seed storage-proteins Telomeric C-bands Centromere Linkage mapping |
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