Brassica juncea Seed Oil Oleic Acid Composition

The patent applies parameter changes by modifying the fatty acid composition parameters through genetic manipulation. Specifically, it alters the oleic acid content from conventional levels (typically 40-60%) to elevated levels (>70%), and reduces linolenic acid content from conventional levels (typically 10-20%) to lower levels (<5%). This is achieved through mutation breeding and selection of lines with modified fatty acid profiles, directly changing the chemical composition parameters to improve oxidative stability while maintaining canola quality standards.

The patent employs self-service through mutation breeding techniques where the plant system itself generates the desired genetic variations. By exposing Brassica juncea to mutagens (chemical or physical), the breeding process harnesses the plant's own genetic machinery to create spontaneous mutations in fatty acid synthesis genes. This self-generating approach to genetic modification reduces the need for complex external gene manipulation technologies while achieving the desired oleic acid enrichment and linolenic acid reduction.

The patent applies preliminary action by performing mutation breeding and selection in early generations to establish lines with predetermined fatty acid profiles. Through systematic mutagenesis and multi-generational selection (M2, M3, M4 generations), the breeding process pre-establishes genetic lines that naturally produce the desired fatty acid composition. This preliminary genetic programming ensures that subsequent oil production from these lines consistently achieves the target composition (>70% oleic acid, <5% linolenic acid) without requiring complex post-harvest manipulation or processing controls.