Unlocking historical phenotypic data from an ex situ collection to enhance the informed utilization of genetic resources of barley (Hordeum sp.)
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Key message Historical data generated during seed regeneration are valuable to populate a bio-digital resource center for barley (Hordeum sp.).
Precise estimates of trait performance of genetic resources are considered as an intellectually challenging, complex, costly and time-consuming step needed to exploit the phenotypic and genetic diversity maintained in genebanks for breeding and research. Using barley (Hordeum sp.) as a model, we examine strategies to tap into historical data available from regeneration trials. This is a first step toward extending the Federal ex situ Genebank into a bio-digital resource center facilitating an informed choice of barley accessions for research and breeding. Our study is based on historical data of seven decades collected for flowering time, plant height, and thousand grain weight during the regeneration of 12,872 spring and winter barley accessions. Linear mixed models were implemented in conjunction with routines for assessment of data quality. A resampling study highlights the potential risk of biased estimates in second-order statistics when grouping accessions for regeneration according to the year of collection or geographic origin. Based on rigorous quality assessment, we obtained high heritability estimates for the traits under consideration exceeding 0.8. Thus, the best linear unbiased estimations for the three traits are a valuable source to populate a bio-digital resource center for the IPK barley collection. The proposed strategy to leverage historical data from regeneration trials is not crop specific and can be used as a blueprint for other ex situ collections.
The Federal Ministry of Education and Research of Germany is acknowledged for funding (Grants FKZ031B0184A (AWS) and FKZ031B0190A (MYG)).
Author contribution statement
MYG, AG, YZ, NP, and JCR designed the study. MYG, AWS, and JCR wrote the manuscript. MYG, YZ, and NP designed and performed the computational experiments. SW, AB, and MO cleansed and compiled phenotypic data. All authors helped to improve the manuscript. All authors agree with the current statement.
Compliance with ethical standards
Conflict of interest
All authors declare that they have no conflict of interest.
All experiments were performed under the current laws of Germany.
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