Analysis of the factors that influence the quality of rapeseed and sunflower seeds and development of predictive models | OCL

Diversity of Plant Proteins extracted from Oil & Protein Crop / Diversité des protéines végétales issues des oléoprotéagineux

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Table 1

Selected factors impacting rapeseed seed quality (either DDM protein or oil concentration).

Factors	Type of variable	Modalities	DDM Protein % 18 variables	Oil % 21 variables
Terres Inovia (TI) development regions	categorical	11 French regions	+	+
Soil texture	categorical	from GEPPA soil texture triangle	+	+
Varietal characteristics
•Potential DDM protein content	numerical (%)		+	+
•Potential oil content to standards	numerical (%)		+	+
•Type of variety	categorical	restored hybrid, varietal association, inbred line	+	+
•Maturity earliness	categorical	mid-early, mid-late, early, late	+	+
•Flowering earliness	categorical	mid-early, mid-late, early, late	+	+
•Stem elongation	categorical	low, medium, high	+	+
•Plant height	categorical	short, medium, tall, very tall	+	+
N Fertilization:
•Deviation of applied N rate from the optimum (X rate)	numerical (kg.ha⁻¹)		+	+
•Fraction of N amount applied late from the E stage	numerical (%)		+	+
Sowing date	numerical (d)	days from Jan 1	+	+
Grain yield to standards (at 9% moisture and 2% of waste)	numerical (q.ha⁻¹)		+
Radiation (PAR)
•phase 6	numerical (MJ.m⁻²)		+	+
• phase 10	numerical (MJ.m⁻²)			+
Climatic deficit (P-PET)*
•phase 7 - flowering	numerical (mm)			+
•phase 8 - grain filling	numerical (mm)		+	+
•phase 9 (spring recovery to G1)	numerical (mm)		+
•phase 11 (spring recovery: C2 to D1)	numerical (mm)			+
•phase 12 (bud formation: D2 to E)	numerical (mm)			+
Number of days with Tmax > 30°C
•phase 17 (grain filling: G2 to G4)	numerical (d)		+	+
Number of days with Tmax > 28°C
•phase 15 (mid-flowering)	numerical (d)		+	+
•phase 16 (G1)	numerical (d)			+

*water deficit increases with negative values of P-PET; see Figure S1 for the identification of growth stages.

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