Ag Data Commons

File(s) stored somewhere else

Please note: Linked content is NOT stored on Ag Data Commons and we can't guarantee its availability, quality, security or accept any liability.

Code from: Survival analysis of freezing stress in the North American native perennial flax, Linum lewisii Pursh.

posted on 2024-03-29, 18:03 authored by Brian SmartBrian Smart, Brent S. Hulke


The expansive range of Lewis flax (Linum lewisii Pursh.), an herbaceous perennial, exposes the species to a diversity of climatic conditions. As interest in the domestication and adoption of perennial crop alternatives grows and interest in this species for natural area restoration continues, the assurance of a commercial plant variety’s ability to endure the full range of possible climatic extremes is paramount. This study examines the freezing tolerance of a geographically representative sampling of 44 Lewis flax accessions at winter temperature extremes experienced in the northern Great Plains of the United States. Survival analysis models were adapted to include temperature exposure, in replacement of ordinal time typically used in such models, to produce statistics evaluating reactions to extreme temperatures that Lewis flax would encounter in our field environments. Our results revealed Lewis flax is more freezing tolerant than previously reported, and revealed four accessions with significantly superior genetic freezing tolerance than the released ‘Maple Grove’ cultivar. Furthermore, regrowth analyses indicate variation among accessions not associated with survival, which could lead to improving regrowth rate and survival simultaneously. These findings and their methodology expand the understanding of Lewis flax adaptation for winter hardiness and offer an efficient, new model that can be used to evaluate freezing tolerance at ordinal temperatures without requiring extensive prior physiological knowledge for a species.


GitHub for Gossweiler et al., 2024. Contains R code used for figure generation and SAS code for statistical analyses.




Data contact name

Smart, Brian, C.

Data contact email



Intended use

The dataset and its associated R and SAS scripts are intended for academic research and educational purposes, facilitating the replication of our study on Lewis flax's freezing tolerance and supporting further analysis in plant science, genetics, and climate adaptability research.

Use limitations

Users are asked to honor the ethical and legal bounds of this dataset, free of sensitive info but requiring compliance with data laws. Provided 'as is', its completeness or accuracy for all uses isn't guaranteed. Proper citation in use is encouraged.

Temporal Extent Start Date


Temporal Extent End Date



  • asNeeded


  • Not specified

Geographic location - description

North America, west of the Mississippi

ISO Topic Category

  • elevation
  • farming
  • location

National Agricultural Library Thesaurus terms

cold stress; indigenous species; perennials; Linum perenne subsp. perenne; Linum lewisii; flax; climatic factors; winter; temperature; Great Plains region; models; freezing; cultivars; regrowth; winter hardiness; grains; frost

OMB Bureau Code

  • 005:18 - Agricultural Research Service

OMB Program Code

  • 005:040 - National Research

Pending citation

  • No

Related material without URL

André Dunedin Gossweiler, Brian C. Smart, and Brent S. Hulke (in review). Survival analysis of freezing stress in the North American native perennial flax, Linum lewisii Pursh. AoB Plants.

Public Access Level

  • Public

Usage metrics



    Ref. manager