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Influence of Oleic Acid Content on Yield in Winter Oilseed Rape
Author(s) -
Schierholt Antje,
Becker Heiko C.
Publication year - 2011
Publication title -
crop science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.76
H-Index - 147
eISSN - 1435-0653
pISSN - 0011-183X
DOI - 10.2135/cropsci2010.07.0411
Subject(s) - oleic acid , brassica , linolenic acid , biology , yield (engineering) , fatty acid , composition (language) , horticulture , germination , food science , agronomy , botany , linoleic acid , biochemistry , materials science , linguistics , philosophy , metallurgy
Winter oilseed rape ( Brassica napus L.) with a high oleic (>75%) and/or low linolenic acid (∼2%) content in the seed oil is of interest for nutritional and technical purposes. We analyzed whether a change in seed fatty acid composition has a direct influence on yield. Parental lines with different fatty acid composition were crossed, the segregating F 2 populations were divided, and F 3 bulks with contrasting fatty acid profiles were tested in two experiments. In Experiment 1, we developed four bulks in each of three crosses, which varied in oleic (58 to 82%) and linolenic (2 to 11%) acid content. F 3 bulks were tested for 2 yr at three locations in Germany. In Experiment 2, two F 3 bulks each were developed in 16 segregating F 2 populations with high (74 to 79%) and low (59 to 64%) oleic acid content. F 3 bulks were tested for 1 yr at five locations. The seed linolenic acid content did not significantly affect yield. In both experiments high oleic acid content was negatively associated with yield (with a reduction of 1.7 deciton [dt] ha −1 and 2.0 dt ha −1 of high versus low oleic acid bulks in Experiments 1 and 2). High oleic bulks exhibited a significantly increased oil content (+0.6%). Yield was negatively correlated with leaf and seed oleic acid content ( r = –0.52 and r = –0.48, respectively). Seeds with high oleic acid content showed a significantly retarded germination. Breeding high oleic varieties could be complicated by the negative correlation between yield and oleic acid content.