Producing primary triticales in the greenhouse
The following scheme illustrates how primary triticales are made by single crosses:
|Soft wheat, hexaploid, Genome: AABBDD||Rye, diploid, Genome: RR||Primary triticale, octoploid, Genome: AABBDDRR|
|Hard wheat, tetraploid, Genome: AABB||Rye, diploid, Genome: RR||Primary triticale, hexaploid, Genome: AABBRR|
Secondary triticales are obtained by crossing two differently composed primary triticales as shown below:
|Primary triticale, octoploid, Genome: AABBDDRR||Primary triticale, hexaploid, Genome: AABBRR||Secondary Triticale, hexaploid, Genome: AABBRR|
The diversity of triticale lines can be augmented by producing substitution triticales as follows:
|Soft wheat, hexaploid, Genome: AABBDD||Secondary triticale, hexaploid, Genome: AABBRR||Substitution triticale, hexaploid, Genome: AABBRR or AABBRD|
For a better understanding, the above schemes have been simplified. Mostly, a qualified variety is made up more complicated. After crossing work has been finished, selection work is carried out in breeding plots:
Selection within small plots
Laborious detailed work is necessary to select the promising lines which have to be multiplied and selected anew through several generations for yield and other characters on different locations.
It takes 15 years and more from the first cross to the official release of a variety which is precondition for marketing the seeds.
To continue, click: Breeding Aims