Subject	Chemistry: Analytical Chemistry: Spectroscopy Agricultural and Biological Sciences
Specific subject area	Spectral and chemical characterization of winter oilseed rape (WOSR) tissues
Type of data	Table, Figure, Spectroscopic data. Raw data presented as .csv file formats.
Data collection	Tissues were collected on winter oilseed rape accessions grown under contrasted environmental conditions. All data were all recorded in 2017 on samples of homogeneous ground dried tissues. Spectral data were acquired using a Fourier transform near infrared spectrometer (MPA, Multi Purpose FT-NIR Analyser – Bruker Optics GmbH, Ettlingen, Germany). Each spectrum was collected in reflectance mode covering wavenumbers from 4000 to 12,000 cm−1 with a 16 cm−1 optical resolution and resulted from an average of 64 successive data acquisitions. Spectral data were expressed in absorbance per each wavenumber (in cm−1). N and C contents were determined by the Dumas combustion method using an automated CN analyzer (Elementar Vario Micro cube CHNS – Elementar Analysensysteme GmbH, Germany). N and C contents were expressed in % of dry matter.
Data source location	Institution: Institute of Genetics, Environment and Plant Protection (IGEPP); INRAE, Institut Agro, University of Rennes City/Town/Region: 35,650 Le Rheu Country: France
Data accessibility	Repository name: Data INRAE (https://data.inrae.fr/) Data identification number: 10.57745/6VYUQN Direct URL to data: https://entrepot.recherche.data.gouv.fr/dataset.xhtml?persistentId=doi:10.57745/6VYUQN
Related research article	None