On the nature of hybrid dwarfness

On the nature of hybrid dwarfness In studies of the hybrid combination ((F4 Khar’kovskaya 46 × Triticum dicoccum) × Khar’kovskaya 46), a short-stemmed line, whose progeny exhibited traits of hybrid dwarfism, segregated with a frequency close to 1: 15. Analysis of this line in F3 and hybrids from crosses of the short-stemmed line from this combination with the long-stemmed accession T. turgidum L. (c-38097) showed that the stem size variability curves of the both lines have two peaks. Since these results cannot be explained by complementary interaction of D genes, hybrid dwarfism is probably controlled by pleiotropic action of two genes that have multiple pleiotropic effect on the D 2 D 2 D 3 D 3 genes. Two or three rounds of selection performed on the progeny of plants higher than 80–100 cm produces stable lines without hybrid dwarfism traits, i.e., the pleiotropic effect disappears. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Genetics Springer Journals

On the nature of hybrid dwarfness

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Publisher
SP MAIK Nauka/Interperiodica
Copyright
Copyright © 2010 by Pleiades Publishing, Ltd.
Subject
Biomedicine; Microbial Genetics and Genomics; Animal Genetics and Genomics; Human Genetics
ISSN
1022-7954
eISSN
1608-3369
D.O.I.
10.1134/S1022795410080156
Publisher site
See Article on Publisher Site

Abstract

In studies of the hybrid combination ((F4 Khar’kovskaya 46 × Triticum dicoccum) × Khar’kovskaya 46), a short-stemmed line, whose progeny exhibited traits of hybrid dwarfism, segregated with a frequency close to 1: 15. Analysis of this line in F3 and hybrids from crosses of the short-stemmed line from this combination with the long-stemmed accession T. turgidum L. (c-38097) showed that the stem size variability curves of the both lines have two peaks. Since these results cannot be explained by complementary interaction of D genes, hybrid dwarfism is probably controlled by pleiotropic action of two genes that have multiple pleiotropic effect on the D 2 D 2 D 3 D 3 genes. Two or three rounds of selection performed on the progeny of plants higher than 80–100 cm produces stable lines without hybrid dwarfism traits, i.e., the pleiotropic effect disappears.

Journal

Russian Journal of GeneticsSpringer Journals

Published: Aug 17, 2010

References

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