Off-season seed multiplication in spring barley: a scale-up step for speed breeding.

Alina G Marenkova, Vladimir N Igonin, Alina A Kocheshkova, Kroupin P Yu, Mikhail G Divashuk

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Article in Frontiers in plant science, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 · Who and what money

Authors and funding

5 authors.

Alina G MarenkovaDepartment of Applied Genetic Technologies, All-Russia Research Institute of Agricultural Biotechnology, Moscow, Russia.

Vladimir N IgoninDepartment of Applied Genetic Technologies, All-Russia Research Institute of Agricultural Biotechnology, Moscow, Russia.

Alina A KocheshkovaDepartment of Applied Genetic Technologies, All-Russia Research Institute of Agricultural Biotechnology, Moscow, Russia.

Kroupin P YuDepartment of Applied Genetic Technologies, All-Russia Research Institute of Agricultural Biotechnology, Moscow, Russia.

Mikhail G DivashukDepartment of Applied Genetic Technologies, All-Russia Research Institute of Agricultural Biotechnology, Moscow, Russia.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Speed breeding (SB) accelerates generation turnover, but the small seed quantities produced during rapid generation advance remain a bottleneck. Here, we quantify intensive off-season seed multiplication as a scale-up stage of the SB pipeline. Using spring barley, we tested two lighting systems, high-pressure sodium (HP S) and light-emitting diode (LED), and two cultivars at three pot configurations in Moscow (55.75°N) over winter at 24°C and a 22-h photoperiod. Fertile tillers reached 31-105 per plant, and the mean seed number ranged from 553 to 1,562 per plant, giving a seed multiplication ratio ( SMR; seeds harvested per seed sown) of up to ~1,560, against typical field values of ~30-120 seeds per plant. The response was reproduced in both cultivars. Per lamp-supplied photon, HP S matched or exceeded LED efficiency in all three pot configurations, indicating that the higher LED yields reflect a greater photon dose rather than spectral superiority. Per unit area, 2 L pots were the most efficient (~20,000-24,500 seeds m

Indexed as

breeding pipelinecontrolled environmenthigh-pressure sodiumHordeum vulgareLEDoff-season multiplicationseed multiplication ratio (SMR)speed breeding

Identifiers

PMID42694429

DOI10.3389/fpls.2026.1912336

PMCPMC13538881

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.