Researchers Release New Rubber Dandelion Genome Map

The 1.19-Gb reference assembly provides a higher resolution map to support the development of temperate rubber crops.

Updated on Oct. 27, 2026 in Life Sciences

Researchers Release New Rubber Dandelion Genome Map

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Researchers at Ohio State University have published the TarKok 3.0 genome assembly for the rubber dandelion. This new 1.19-gigabyte nuclear reference provides a chromosome-scale map intended to aid the development of temperate-climate rubber alternatives.

Why it matters

Dependency on a single tropical tree species for global natural rubber supplies creates significant supply chain risks. This high-resolution genomic data allows researchers to identify traits like seed production efficiency, accelerating the domestication of rubber-producing temperate plants.

The TarKok 3.0 assembly spans 1.19 Gb, with a contig N50 metric of 37.8 Mb compared to the previous 1.3 Mb standard. Researchers mapped 210 Mb, or 18% of the total assembly, as uniquely mappable, nonrepetitive sequence.

The players

Ohio State University

A major public research institution known for agricultural science and the development of alternative industrial crops.

The details

The team constructed the reference by generating eight chromosome-scale scaffolds to organize the complex dandelion sequence. They identified a specific locus on chromosome 1 tied to filled-seed production by analyzing an F2 population of 83 plants, a method involving breeding generations to isolate specific genetic markers. To define the mappable genome, the researchers intersected sequences that could be uniquely identified with those categorized as nonrepetitive, providing a clearer template for future breeding experiments.

October 27, 2026: The research team published the TarKok 3.0 assembly.

The Tech Race

This assembly advances efforts to move rubber production from tropical zones to temperate regions, challenging the dominance of the Hevea brasiliensis tree. By providing a high-resolution reference, the project aims to stabilize the supply chain for a material critical to global manufacturing.

This genomic reference provides the foundation for scientists to breed more efficient dandelion varieties for industrial use. While it does not change product availability today, it serves as a prerequisite for establishing a domestic, temperate-climate rubber supply chain in the coming years.

The takeaway

The TarKok 3.0 assembly offers a vital blueprint for agricultural researchers aiming to optimize rubber yield in non-tropical climates. Observers should track future studies on the chromosome 1 locus to see if it enables high-volume seed production in commercial-scale rubber dandelion harvests.