Influence of Oleic Acid Content on Yield in Winter Oilseed Rape

Abstract

Winter oiiseed rape {Brassica napus L.) with a inigh oleic (>75%) and/or iow iinolenic acid (-2%) content in the seed oil is of interest for nutritional and teciinicai purposes. We anaiyzed whetiier a change in seed fatty acid composition has a direct infiuence on yieid. Parental lines with different fatty acid composition were crossed, the segregating F^ popuiations were divided, and F3 buiks with contrasting fatty acid profiles were tested in two experiments. In Experiment 1, we developed four buiks in each of three crosses, which varied in oleic (58 to 82%) and linoienic (2 to 11%) acid content. F3 bulks were tested for 2 yr at three locations in Germany. In Experiment 2, two F3 bulks each were developed in 16 segregating Fg popuiations with high (74 to 79%) and iow (59 to 64%) oieic acid content. F3 buiks were tested for 1 yr at five iocations. The seed linoienic acid content did not significantly affect yieid. In both experiments high oleic acid content was negativeiy associated with yieid (with a reduction of 1.7 deciton [dt] ha"^ and 2.0 dt ha"' of high versus low oleic acid bulks in Experiments 1 and 2). High oieic bulks exhibited a significantiy increased oii content (+0.6%). Yield was negatively correiated with leaf and seed oieic acid content (r = -0.52 and r = -0.48, respectiveiy). Seeds with high oleic acid content showed a significantiy retarded germination. Breeding high oieic varieties could be complicated by the negative correiation between yield and oleic acid content.

Selection of Agronomic Parameters and Construction of Prediction Models for Oleic Acid Contents in Rapeseed Using Hyperspectral Data

“…The content of the oleic acid in leaves can be used as a sensitive agronomic parameter for the prediction of the oleic acid spectra in rapeseed. This conclusion is similar to the research results of Schierholt et al [17] and Gao et al [18]; that is, in breeding, materials with a high oleic acid content in seeds can be predicted and screened by detecting the oleic acid content in vegetative organs. However, this study only discussed the effect of the most sensitive parameter as the intermediate variable in constructing the prediction model and did not consider the case in which multiple agronomic parameters were used to estimate the oleic acid content in rapeseed.…”

“…Two association analysis methods, grey correlation analysis (GRA) and Pearson correlation analysis, were used in this study. Among them, GRA, as a grey system analysis method, applies to the study of the strength relationship between dependent variables affected by other factors [17], that is, the degree of influence among various factors is determined by the correlation degree. It is mainly used to identify the optimal estimated agronomic parameters.…”

Identification and Functional Analysis of Two New Mutant BnFAD2 Alleles That Confer Elevated Oleic Acid Content in Rapeseed

“…For example, a FAD2 mutant in Arabidopsis failed to undergo normal growth during development at low temperatures ( Miquel et al, 1993 ; Miquel and Browse, 1994 ). Furthermore, another report suggested that high oleic acid expression in rapeseed would likely be accompanied with reduced yield and lower germination rates ( Schierholt and Becker, 2001 , 2011 ). Thus, although it was beyond the scope of the present study, a comprehensive exploration was required to evaluate the effects of increased oleic acid on the yield of N1379T.…”