Abstract
AbstractThe fatty acid composition of seed oil of four interspecific hybrids, resulting from crosses between zero erucic acid Brassica rapa (AA), and high erucic acid Brassica alboglabra/Brassica oleracea (CC) and Brassica carinata (BBCC), void of erucic acid genes in their A‐genomes was examined. The erucic acid content in resynthesized Brassica napus (AACC) lines derived from these crosses was only about half that of the high erucic acid CC genome parents, indicating equal contributions of the two genomes to oil (fatty acid) synthesis and accumulation. The differences in C18 fatty acid synthesis between the parents were also evident in the resulting resynthesized B. napus plants. Hexaploid Brassica plants of the genomic constitution AABBCC, in which the AA genome was incapable of erucic acid synthesis, had lower erucic acid contents than the B. carinata (BBCC) parent. This is plausible considering the fact that the zero erucic acid AA genome contributes to oil synthesis in AABBCC plants, thus reducing erucic acid content.
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