Embryo lethality in wheat × rye hybrids—mode of inheritance and the identification of a complementary gene in wheat
2010
Tikhenko, N | Tsvetkova, N | Voylokov, A | Dobrovolskaya, O | Zaynali Nezhad, K | Röder, M. S | Börner, A
Crosses between hexaploid wheat and rye can only succeed when pre- and post-zygotic barriers have been overcome. A rye gene determining embryo lethality (Eml-R1), which is involved in post-zygotic isolation, has been mapped to chromosome 6R. In the present paper the mode of inheritance of Eml-R1 was studied by employing a wheat/rye chromosome 6R addition line. We show that Eml-R1 exists in at least two alternative forms, with the mutant allele Eml-R1b being dominant with respect to wild-type Eml-R1a. Furthermore, we have exploited nulli-tetrasomic lines of wheat to detect a complementary wheat gene present on chromosome 6A. This gene has been designated Eml-A1.
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