About this Dataset

Data From: Survival Analysis Of Freezing Stress In The North American Native Perennial Flax, Linum Lewisii Pursh.

Abstract

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.

Content

Frost tolerance of 44 Linum lewisii accessions collected from western North America.
Organization: Department of Agriculture
Last updated: 2024-05-02T12:50:07.810571
Tags: frost-hardiness, linum-lewisii, perennial-grains

Tables

BioClim Codes

@usgov.usda_gov_data_from_survival_analysis_of_freezing_stres_e556e008.bioclim_codes

3.31 kB
19 rows
3 columns

CREATE TABLE bioclim_codes (
  "var" VARCHAR,
  "abrev" VARCHAR,
  "description" VARCHAR
);

FlaxAcclimatizationGrowthFreeze

@usgov.usda_gov_data_from_survival_analysis_of_freezing_stres_e556e008.flaxacclimatizationgrowthfreeze

4.76 kB
42 rows
4 columns

CREATE TABLE flaxacclimatizationgrowthfreeze (
  "accession" VARCHAR,
  "leastsquaremeancm" DOUBLE,
  "pvalue" VARCHAR,
  "standarderror" DOUBLE
);

FlaxFrostSurvivorFunctionEstimateHazardTime3 (1)

@usgov.usda_gov_data_from_survival_analysis_of_freezing_stres_e556e008.flaxfrostsurvivorfunctionestimatehazardtime3_1

10.73 kB
210 rows
9 columns

CREATE TABLE flaxfrostsurvivorfunctionestimatehazardtime3_1 (
  "accession" VARCHAR,
  "hazardvalue" VARCHAR,
  "lowerlimithazard" VARCHAR,
  "upperlimithazard" VARCHAR,
  "samplenumber" BIGINT,
  "time" BIGINT,
  "temperature" BIGINT,
  "survivorfunctionestimate" DOUBLE,
  "hazardlabel" VARCHAR
);

FlaxPostFrostHeightTrendNoLessThanSigns

@usgov.usda_gov_data_from_survival_analysis_of_freezing_stres_e556e008.flaxpostfrostheighttrendnolessthansigns

13.19 kB
3,520 rows
8 columns

CREATE TABLE flaxpostfrostheighttrendnolessthansigns (
  "sample_number" BIGINT,
  "treat" BIGINT,
  "time" BIGINT,
  "total_heightregbrady" DOUBLE,
  "accession" VARCHAR,
  "treatmentp" DOUBLE,
  "timep" DOUBLE,
  "treatmentxtimep" DOUBLE
);

GrowthChamberTemperatures

@usgov.usda_gov_data_from_survival_analysis_of_freezing_stres_e556e008.growthchambertemperatures

222.25 kB
8,835 rows
27 columns

CREATE TABLE growthchambertemperatures (
  "datentime" TIMESTAMP,
  "chambersetpoint" DOUBLE,
  "chamberpoint1" DOUBLE,
  "chamberpoint2" DOUBLE,
  "trialtemp" BIGINT,
  "a1" DOUBLE,
  "a2" DOUBLE,
  "a3" DOUBLE,
  "b1" DOUBLE,
  "b2" DOUBLE,
  "b3" DOUBLE,
  "averagetemp" DOUBLE,
  "date_timebuttons" TIMESTAMP,
  "unit" VARCHAR,
  "prog_name" VARCHAR,
  "seq_iter" VARCHAR,
  "mode" VARCHAR,
  "prog_step" BIGINT,
  "seq_step" BIGINT,
  "unnamed_19" VARCHAR  -- Unnamed: 19,
  "date_time" TIMESTAMP,
  "unit_1" VARCHAR,
  "a2value" DOUBLE,
  "a3_1" DOUBLE,
  "b1_1" DOUBLE,
  "b2_1" DOUBLE,
  "b3_1" DOUBLE
);

NDAWN Fargo 10–25 1990-2021 BareTurfSoilTemp

@usgov.usda_gov_data_from_survival_analysis_of_freezing_stres_e556e008.ndawn_fargo_10_25_1990_2021_bareturfsoiltemp

148.94 kB
11,324 rows
5 columns

CREATE TABLE ndawn_fargo_10_25_1990_2021_bareturfsoiltemp (
  "year" BIGINT,
  "month" BIGINT,
  "day" BIGINT,
  "avgbaresoiltempf" DOUBLE,
  "avgturfsoiltempf" DOUBLE
);

RDA Accession

@usgov.usda_gov_data_from_survival_analysis_of_freezing_stres_e556e008.rda_accession

8.67 kB
41 rows
8 columns

CREATE TABLE rda_accession (
  "source" BIGINT,
  "population" VARCHAR,
  "preaccavght" DOUBLE,
  "dotavght" DOUBLE,
  "neg12wk3ht" DOUBLE,
  "neg12wk1to2avg" DOUBLE,
  "accpercgrowth" DOUBLE,
  "survival" DOUBLE
);