A Database for Triticeae and Avena
II.23. Possible origin of aneuploids.
Orin Pearson and R. A. Nilan. Department of Agronomy and Soils, Washington
State University, Pullman, Washington 99163, U.S.A.
Preliminary studies have suggested that at least some of the aneuploids
observed among progeny of desynaptic mutants as well as certain virus infected
varieties may be a result of an exchange of nuclear material during microsporogenisis
(cytomixis). Microsporocytes from several desynaptic lines and from Trystofte
Prentice which was 60% infected with barley stripe mosaic virus
are being cytologically examined for nuclear exchanges during prophase
I and for extra chromosome pairs at metaphase I of meiosis. Electron microscope
studies have been initiated to analyse the possible nuclear exchange at
the ultra structural level.
BGN 2 toc
BGN Main Index