Selection for contrasting tocopherol content and profile in Ethiopian mustard |
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Authors: | Leonardo Velasco Elena García‐Navarro Begoña Pérez‐Vich José M. Fernández‐Martínez |
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Affiliation: | Instituto de Agricultura Sostenible (IAS‐CSIC), , 14004 Córdoba, Spain |
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Abstract: | Tocopherols are compounds present in oilseeds with major effect on nutritional and technological properties of seed oils. Brassica spp. mainly contain varying concentrations of α‐tocopherol, with high vitamin E value, and γ‐tocopherol, which contributes to oil stability. The objective of this research was to select for contrasting tocopherol content and profile in Ethiopian mustard (Brassica carinata A. Braun). A collection of 211 F4:5 lines was evaluated for tocopherol content and profile, and divergent selection was conducted till the S3:4 generation. Selection resulted in two lines with increased tocopherol content (244 and 243 mg/kg seed as average of four environments), one line with reduced tocopherol content (117 mg/kg), two lines with reduced α/γ‐tocopherol ratio (0.22 and 0.28) and two lines with increased α/γ‐tocopherol ratio (3.74 and 3.34). Control line C‐101 averaged 196 mg/kg with α/γ‐tocopherol ratio of 1.10. Reduced α/γ‐tocopherol ratio was controlled by recessive alleles at a single locus. Seed to plant correlation was high (r = 0.92), which suggests the feasibility of selecting at the single‐seed level. |
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Keywords: | alpha‐tocopherol
Brassica carinata
Ethiopian mustard gamma‐tocopherol genetic variation inheritance seed tocopherols |
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