Rapid techniques for assessing fibre quality of flax breeding lines and cultivars using visible and near infrared spectroscopy, and thermal analysis

Abstract

Fifteen different flax cultivars and breeding lines (E-68, -3, 1864-24) were cultivated, harvested, water-retted, scutched and resulting fibres passed through pin frames to produce representative samples for each variety. The aim of this investigation was to develop rapid techniques for assessing quality of fibre obtained from a comparative agronomical trial. The fibres produced were then assessed using visible and near infrared spectroscopy (Vis-NIRS), thermal analysis, scanning electron microscopy and airflow method for measuring fibre fineness. The relationships between agronomical characteristics, fibre fineness, thermal and spectral results were assessed using principal component analysis and partial least squares regression methods. The micrographs of the samples revealed the presence of residual pectic and cuticular tissues on all fibres, and significant differences between the 15 fibre samples were not observed. A significant relationship of the differences in fibre fineness of the test samples as measured by airflow method and Vis-NIR spectra was observed with an R 2 of 0.97 and standard error of calibration (SEC) of 1.69 dtex, and the former parameter also correlated with the measured thermal combustion parameters showing an R 2 of 0.91 and SEC of 2.86 dtex, indicating that the two rapid techniques could be used for the assessment of fibre quality of selected plants from the breeding programme. The advantages of using the two instrumental techniques compared with the existing airflow method are briefly discussed.

Winter Survivability and Subsequent Performance of Fall-Planted Flax (Linum usitatissimum L.) in Mid-Central Virginia

“…In addition, as was the case in 2021, bird infestation and associated field seed losses were experienced in 2022. The plants that survived and continued to grow in spring produced seeds with sizes comparable to those reported elsewhere [29,43,45,46]. The lack of flax cultivar and planting date interaction in 2021 may be attributed to the relatively mild winter.…”

“…The yields for some varieties compared well to those found for fall crops in south-east Texas [40,41] and to those reported for flax crops in the stacked crop-rotation system in the northern Great Plains [42]. Seed yields were slightly lower than those reported for Lithuanian varieties 'Snaigiai' and 'Hermes' that averaged 670 kg ha −1 [43], and were also much lower than the value over 1000 kg ha −1 obtained for flax grown as a winter crop [27,29]. The seed yields were much lower than those reported for the same varieties planted in spring in North Dakota [44].…”