Abstract
The phenotypic manifestation and genetic control of embryo lethality observed in crosses between common wheat and rye were studied. It was found that crosses between common wheat and inbred self-fertile rye lines L2 and 535 gave rise to ungerminating grains, in which the development and differentiation of the hybrid embryo are arrested. Study of the degree of embryo development in the hybrid grains obtained by crossing common wheat varieties with inbred rye lines L2 and 535 showed that genotypes of the parents affected the ratio between undifferentiated embryos of various sizes. Analysis of this trait was performed by test crosses according to a novel pedigree program with the use of interlinear hybrids and a set of fourth-generation hybrid recombinant inbred lines. Rye line L2 was shown to bear the Eml (Embryo lethality) gene, which terminates the development of the hybrid embryo in amphihaploids. The suggestion of complementary interaction between wheat and rye genes during formation of a “new” character in wheat-rye F1 hybrids is discussed. A method of detecting an allele not complementary to the rye Eml allele in wheat is proposed. The proposed test program allows appropriate study of the system of wheat and rye genes involved in complementary interaction in the genotype of a distant hybrid.
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Translated from Genetika, Vol. 41, No. 8, 2005, pp. 1075–1083.
Original Russian Text Copyright © 2005 by Tikhenko, Tsvetkova, Voylokov.
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Tikhenko, N.D., Tsvetkova, N.V. & Voylokov, A.V. Genetic Control of Embryo Lethality in Crosses between Common Wheat and Rye. Russ J Genet 41, 877–884 (2005). https://doi.org/10.1007/s11177-005-0175-9
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DOI: https://doi.org/10.1007/s11177-005-0175-9