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Monosomic Analysis for Bunt Resistance in Derivatives of Turkey and Oro Wheats 1
Author(s) -
Schmidt J. W.,
Morris R.,
Johnson V. A.
Publication year - 1969
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci1969.0011183x000900030009x
Subject(s) - biology , chlamydospore , poaceae , chromosome , botany , ploidy , agronomy , conidium , gene , genetics
The “Turkey” factor for resistance to bunt, Tilletia foetida (Wallr.) Liro, in wheat, Triticum aestivum L., has been placed on chromosome 1B through the use of the monosomic analysis technique. Two varieties derived from ‘Turkey’ wheat, ‘Omaha’ and ‘Nebred,’ and two ‘Oro’ wheat derivatives, ‘Bison’ and ‘Kaw,’ were each crossed to monosomic 1B plants of ‘Wichita’ wheat and to one additional randomly available monosomic line. Before seeding, the seeds were dusted with chlamydospores of a collection of bunt maintained at the Nebraska Agricultural Experiment Station. In the field, F 2 populations from F 1 monosomic IB plants had significantly lower percentages of diseased plants than those from sib F 1 disomic plants or from F 1 plants monosomic for the other chromosomes. Greenhouse data were less conclusive. As a group, the F 2 populations from the monosomic chromosome 1B had significantly lower percentage of diseased plants than either those from sister disomic F 1 plants or those from F 1 plants monosomic for a chromosome other than 1B.