Embryo lethality in wheat x rye hybrids-mode of inheritance and the identification of a complementary gene in wheat

作者：Tikhenko N; Tsvetkova N; Voylokov A; Dobrovolskaya O; Nezhad K Zaynali; Roeder M S; Boerner A^*

来源：Euphytica, 2010, 176(2): 191-198.

DOI：10.1007/s10681-010-0202-3

• Dobzhansky-Muller model
• Hybrid embryo lethality
• Nullisomic-tetrasomic wheat lines
• Wheat-rye addition lines
• Wheat x rye hybrids

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.

• 出版日期2010-11