Novel Tetraploid Triticale (Einkorn Wheat × Rye)-A Source of Stem Rust Resistance

Area of Science:

• Agriculture
• Plant Breeding
• Genetics

Background:

• Triticale offers advantages like high yield in marginal environments and industrial energy potential.
• Narrow genetic diversity in current triticale limits its resistance, leading to recent collapses.
• Developing novel triticale varieties is crucial for sustainable agriculture.

Purpose of the Study:

• To develop a novel synthetic tetraploid triticale.
• To evaluate its yield-shaping traits compared to existing cultivars.
• To assess its potential as pre-breeding germplasm or a new crop.

Main Methods:

• Crossing rye (Secale cereale L.) with einkorn wheat (Triticum monococcum spp. monococcum).
• Obtaining three generations of alloploids via chromosome doubling and self-pollination.
• Conducting cytogenetic analyses to confirm chromosome number (28 chromosomes: 14 Am-genome, 14 R-genome).

Main Results:

• The synthetic tetraploid triticale possesses 28 chromosomes (14 Am, 14 R).
• Key yield traits like thousand-grain weight, plant height, and stem length were superior to parental lines.
• Performance exceeded that of standard hexaploid triticale cultivars.

Conclusions:

• The novel tetraploid triticale demonstrates enhanced yield-related traits.
• This genetic stock serves as valuable pre-breeding germplasm for triticale improvement.
• It holds potential for development as a new alternative industrial energy crop.