Stellar Low Linolenic-High Linoleic Acid Summer Rape

Scarth, R.; McVetty, P. B. E.; Rimmer, S. R.; Stefansson, B. R.

doi:10.4141/cjps88-061

Cited by 82 publications

(39 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…By repeated backcrossing with high-yielding 00-cultivars, seed yields in low linolenic offspring were increased continuously, although the selection progress for seed yield appeared to be lower in the low linolenic versus the conventional materials. Similar difficulties were found in a summer rapeseed breeding programme at the University of Manitoba: The first low linolenic summer cultivar 'Stellar' (Scarth et al 1988) yielded 20% less than the control cv. 'Westar', and again the low linolenic cv.…”

mentioning

confidence: 56%

Impact of low linolenic acid content on seed yield of winter oilseed rape (Brassica napus L.)

Rücker

Röbbelen

1996

Plant Breeding

View full text Add to dashboard Cite

An essential quaUty improvement of rapeseed oil can be obtained by reduction of its linolenic acid (C18:3) content from about 10% to less than 3% of the total fatty acids. Genotypes low in C18:3 have been developed by mutagenesis. The initial summer rapeseed mutant had been low yielding and highly susceptible to various diseases. It has been debated whether the low C18:3 character can be successfully combined with high seed yield for physiological reasons. Therefore, the low linolenic character of mutant M48 was transferred into high-yielding genotypes by repeated backcrossing to well-adapted low erucic acid, low glucosinolate (00-) winter rapeseed cultivars. Lines with low C18:3 content were selected from BC3 and BC4 generations and examined in 1990-95. Positive selection response for seed yield was shown to continue over the years. Presently, the best lines are yielding as well as the control cultivars being equivalent also in oil and glucosinolate contents.In order to test the effect of a low C18:3 content on seed yield, plants with low and with high C18:3 content, respectively, were selected from 16 segregating BC5-F2 populations and bulked to form 32 F3 populations. These 'isogenic' bulk populations were tested for field performance at four locations in 1995. The results show that C18:3 content of the seed oil is not associated with seed yield, oil content, beginning of flowering, plant height and disease resistance. Means of relative seed yield for the high and the low linolenic F, bulk populations were not significantly different with 88.0% and 86.9% of the control cultivars, respectively. There was a significant interaction between genotypes with high or low C18:3 content and location. This shows that under specific environmental conditions a low C18:3 content may be either favourable or unfavourable. The results indicate that the low C18:3 character of the original mutants per se does not cause a decrease in seed yield, oil content or general field performance.

show abstract

mentioning

confidence: 56%

Impact of low linolenic acid content on seed yield of winter oilseed rape (Brassica napus L.)

Rücker

Röbbelen

1996

Plant Breeding

View full text Add to dashboard Cite

show abstract

“…The C18:3 content in some of the mutants with altered levels of C18 unsaturated fatty acids, with 39 to 55% C22:1, ranged from 4 to 9%, with an average value similar to that of the first low C18:3 mutant of rapeseed, M57 (Rakow 1973). Based on the previous experience in the development of double zero-low C18:3 cultivars through further improvement of the M57 mutant (Röbbelen and Nitsch 1975;Scarth et al 1988), the Ethiopian mustard mutants should provide a good starting point for the development of zero erucic-low C18:3 lines well-adapted to Southern Spain. With this objective, crosses among these mutants are being made.…”

Section: Resultsmentioning

confidence: 99%

Induced variability for C18 unsaturated fatty acids in Ethiopian mustard

Velasco¹,

Fernández‐Martínez²,

Haro³

1997

Can. J. Plant Sci.

View full text Add to dashboard Cite

Velasco, L., Fernández-Martínez, J. M. and De Haro, A. 1997. Induced variability for C18 unsaturated fatty acids in Ethiopian mustard. Can. J. Plant Sci. 77: 91-95. The improvement of oil composition for C18 unsaturated fatty acids is one of the most important breeding objectives for the development of high-quality Ethiopian mustard oil. The objective of this research was to induce variability for fatty acid composition in this species using chemical mutagenesis. Seeds of line C-101 were treated with 1% ethylmethane sulfonate and the progenies of 8331 M2 plants were screened for fatty acid composition of the oil with near infrared reflectance spectroscopy followed by gas liquid chromatography on selected plants. Oleic and linoleic desaturation ratios (ODR and LDR, respectively) were used to detect putative mutants with altered levels of C18 unsaturated fatty acids. Seven of these mutants were isolated and M4 lines were developed. Six lines were characterized by low ODR, showing an increase in oleic acid and a reduction in linoleic acid. Three of these lines also showed reduced levels of linolenic acid. The other mutant line showed a decrease in both LDR and linolenic acid content. Since different enzyme systems seemed to be altered, a further oil improvement for C18 unsaturated fatty acids may be achieved through recombination among mutants. Key words:Brassica carinata Braun, C18 unsaturated fatty acids, mutagenesis Velasco, L., Fernandez-Martinez, J. M. et Dettaro, A. 1997. Variabilité induite de la composition en acides gras insaturés en C18 de l'huile de la moutarde d'Éthiopie. Can. J. Plant Sci. 77: 91-95. L'amélioration de la composition de l'huile de la moutarde d'Éthiopie en acides gras insaturés C18 est l'un des objectifs de sélection les plus importants pour l'obtention d'une huile de haute qualité. L'objet des travaux présentés ici était d'induire la variabilité de la composition acidolipidique chez cette espèce par mutagenèse chimique. Des graines de la lignée C-101 étaient traitées au sulfonate d'éthylméthane et les descendances de 8 331 plantes M2 étaient testées pour la composition acidolipidique de l'huile par spectroscopie de réflectance dans le proche infrarouge, suivie de l'analyse de certaines plantes par chromatographie en phase gazeuse. Les ratios de désaturation oléique et linoléique (respectivement, ODR et LDR) étaient utilisées pour déceler les mutants susceptibles de présenter des teneurs modifiées en acides gras insaturés en C18. On a ainsi pu isoler 7 de ces mutants, dont ont été obtenues des lignées M4. Six lignées étaient marquées par un ratio ODR bas démontrant un accroissement des teneurs en acide oléique et une réduction de celle en acide linoléique. La lignée restante manifestait une diminution, tant du ratio LDR que de la teneur en acide linolénique. Comme les différents systèmes enzymatiques en cause semblaient modifiés, il serait possible de pousser davantage l'amélioration de la teneur de l'huile en acides gras insaturés en C18 par recombinaison des divers mutants. Mots clés:...

show abstract

“…In 2000, approximately 1700 agricultural and 500 ornamental mutant accessions were cited in the FAO/IAEA Mutant Varieties Database (Jain, 2002). Oilseed germplasm with modified oil characters have been generated through mutation breeding programs, and to date the low linolenic B. napus cultivars Stellar, Apollo and LoLinda were selected from progeny of EMS-mutated 'Oro' seed (Röbbelen & Nitsch, 1975;Scarth et al, 1988Scarth et al, , 1995L. Kott, personal communication).…”

Section: Introductionmentioning

confidence: 99%

Reduction of saturated fats by mutagenesis and heat selection in Brassica napus L

2005

View full text Add to dashboard Cite

The reduction of saturated fats in canola oil has recently been promoted as a goal for breeders for commercial and human health benefits. Currently, saturated fatty acids in Canadian produced canola oil are above the 7% level, and the objective of this study was to generate canola lines with reduced major saturates (palmitic and stearic), by several percent. Mutant embryos generated from direct ultraviolet radiation mutagenesis of microspores in vitro were subjected to heat during the maturation stage. Heat artificially elevated the saturate levels in developing mutant embryos, allowing efficient identification of those with reduced saturates within the expanded range using HPLC fatty acid analysis of the embryo cotyledons. Mutagenesis produced embryos with fatty acids altered in both directions. Major saturate levels in the cotyledons of heat-treated mutant embryos ranged from 3.3 to 16.4% (heated control ca. 6-9%) and 1.3-10% (heated control ca. 2-4%) for palmitic and stearic fatty acids, respectively. Doubled haploid seed derived from embryos grown at normal temperatures confirmed the reduction of major saturates. HPLC fatty acid analysis of DH seed identified saturate levels ranging from 3.9 to 6.5% (control ca. 5.5%) and 0.9-2.7% (control ca.

show abstract

Stellar Low Linolenic-High Linoleic Acid Summer Rape

Cited by 82 publications

References 0 publications

Impact of low linolenic acid content on seed yield of winter oilseed rape (Brassica napus L.)

Impact of low linolenic acid content on seed yield of winter oilseed rape (Brassica napus L.)

Induced variability for C18 unsaturated fatty acids in Ethiopian mustard

Reduction of saturated fats by mutagenesis and heat selection in Brassica napus L

Contact Info

Product

Resources

About