AbstractsBiology & Animal Science

the Cytology of Caryopsis Development in Triticum-Agropyron Amphiploids.

by G.W.R. Walker

Institution: McGill University
Department: Department of Biology.
Degree: PhD
Year: 1952
Keywords: Biology.;
Record ID: 1529922
Full text PDF: http://digitool.library.mcgill.ca/thesisfile108643.pdf


The occurrence of partial sterility in Triticum-Agropyron amphiploids has proved to be a major hindrance to the breeding ot hardy perennial wheat and hardy, large-seeded, soil-binding forage crops in Canada and the United States. Following the first successful cross between Triticum and Agropyron credited by Armstrong (1936) to Tzitzin in 1930, extensive hybridization programs to achieve the aforementioned objectives were undertaken in these two countries and in the U.S.S.R. Approximately thirty species of Agropyron were used in crossing with the wheats and in a summary of these, eight were listed by Smith (1942) as having been successfully hybridized. [...]