Mapping loci controlling the concentrations of erucic and linolenic acids in seed oil of Brassica napus L.

Thormann, C. E.; Romero, J.; Mantet, J.; Osborn, T. C.

doi:10.1007/s001220050278

Cited by 30 publications

(39 citation statements)

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“…The QTL for linolenic acid accounted for 60% of the phenotypic variation seen in the 'Major x Stellar' doubled-haploid population, and were found on LG12 and LG14. Comparative mapping between the two maps of Thormann et al (1996), and Howell et al (1996) would be necessary to establish how LG12 and LG14 relate to those in the present study. Ecke et al (1995), identified two QTL affecting erucic acid concentrations, and three QTL affecting seed oil content, in doubled-haploid populations formed from the varieties of 'Mansholt's Hamburger Raps' and 'Samourai', using MAPMAKER/QTL (Lincoln et al, 1992).…”

Section: Discussionmentioning

confidence: 97%

“…None of the substitution lines representing the distal end of linkage group 13 scored significantly higher than Tapidor in the present study, so we were unable to confirm eru2. Thormann et al (1996), identified two QTL affecting erucic acid levels, and two QTL affecting linolenic acid levels in a doubled-haploid population formed from a cross between rapeseed varieties 'Major' and 'Stellar', using MAPMAKER/QTL v1.1 (Lincoln et al, 1992). The QTL affecting erucic acid levels were mapped to LG7 and LG15 of that cross, and accounted for 95% of the phenotypic variation in the population.…”

Section: Discussionmentioning

confidence: 99%

“…One of the QTL (QTL 8) was identified previously using the B 1 data. Comparative mapping across the linkage maps by Howell et al (1996), Ecke et al (1995), and Thormann et al (1996), is necessary to establish if the other two erucic acid QTL were unique or had been identified before. The extra QTL identified in the present study may result from the increased precision and sensitivity of mapping QTL afforded by the substitution lines.…”

Section: Discussionmentioning

confidence: 99%

“…Oil rich in linolenic acid is unsuitable for human consumption because the unstable, oxidative nature of the fatty acid affects the oil's flavour and quality, and chemical hydrogenation is required to further modify the fatty acid for cooking purposes. On the other hand, low levels of linolenic acid are required as a precursor to producing chemicals essential for normal immunological and vascular system control (Ecke et al, 1995;Jourdren et al, 1996;Thormann et al, 1996). Hence, the value of the crop as a major oil producer has been dependent upon the successful breeding of varieties low in both erucic and linolenic acid, and so the identification of quantitative trait loci (QTL) controlling these traits would be a valuable asset to breeding via marker-assisted selection (MAS).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

QTL analysis of an intervarietal set of substitution lines in Brassica napus: (i) Seed oil content and fatty acid composition

Barnes²,

et al. 2003

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

QTL analysis of an intervarietal set of substitution lines in Brassica napus: (i) Seed oil content and fatty acid composition

Barnes²,

et al. 2003

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“…Ecke et al (1995) and Jourdren et al (1996) mapped the two loci determining erucic acid content in rapeseed populations using both random fragment length polymorphism (RFLP) and random amplified polymorphic DNA (RAPD) markers. Assignment of the two loci to independent linkage groups was confirmed by a QTL approach by Thormann et al (1996). However, the two loci do not contribute equally to erucic acid content.…”

Section: Comprehension Of Genetic Determinismmentioning

confidence: 88%

Erucic acid rapeseed: 1. Prospects of improvements

Sanyal

Pinochet

Merrien

et al. 2015

OCL

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-In the current context of boosting production of high erucic acid rapeseed, because of the wide range of its industrial applications, this literature review is designed to provide a general overview of available varieties, current knowledge of plant improvement and paths of developing research to increase competitiveness of varieties with high erucic acid content. A limited market dominated by a few companies, cropping burdens of high erucic acid rapeseed varieties among the majority "00" varieties and the still low erucic acid content in rapeseed, explains the reduced and uncompetitive varietal offers. To improve this situation, new varieties could be developed, thanks to the classical methods of selection and biotechnology.Keywords: Erucic acid / rapeseed / variety / selection / biotechnology Résumé -Colza érucique : partie 1. les pistes d'amélioration. Dans un contexte de relance de la production d'acide érucique, à partir du colza, en raison de ses nombreuses applications industrielles, ce dossier bibliographique a pour objectif de faire le point sur quelques variétés disponibles, les connaissances actuelles en matière d'amélioration des plantes et les pistes de recherche explorées pour améliorer la compétitivité des variétés éruciques. Un marché limité, dominé par quelques sociétés, les contraintes culturales des variétés riches en acide érucique parmi des variétés « 00 » majoritaires et la teneur encore limitée des graines de colza en acide érucique expliquent une offre variétale réduite et peu compétitive. Pour remédier à cette situation, de nouvelles variétés pourraient être développées, grâce aux techniques classiques de sélection et aux biotechnologies.

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RFLP linkage analysis and mapping genes controlling the fatty acid profile of Brassica juncea using reciprocal DH populations

Mahmood¹,

Ekuere

Yeh

et al. 2003

Theor Appl Genet

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An RFLP linkage map, comprising 300 linked and 16 unlinked loci, was constructed using reciprocal DH populations of Brassica juncea. The linked loci were organized into 18 linkage groups and seven unlinked segments, covering a total map distance of 1,564 cM. The A and B genomes were identified. The chi(2) test showed that 96.1% of the common intervals in the two populations differed non-significantly for recombination fractions, thus strongly suggesting the absence of sex-based differences for recombination fractions in B. juncea. Two QTLs, E(1a) and E(1b), significantly affected erucic acid content, and individually explained 53.7% and 32.1%, respectively, and collectively 85.8% of the phenotypic variation in the population. The QTLs E(1a) and E(1b) showed epistasis, and the full model including epistasis explained nearly all of the phenotypic variation in the population. The QTLs E(1a) and E(1b) were also associated with contents of oleic, linoleic and linolenic acids. Three additional QTLs (LN(2), LN(3) and LN(4)) significantly influenced linolenic acid content. The QTL LN(2) accounted for 35.4% of the phenotypic variation in the population. Epistatic interactions were observed between the QTLs E1a and LN(2). The stability of the detected QTLs across years and locations, and breeding strategies for improving the fatty acid profile of B. juncea, are discussed.

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Mapping loci controlling the concentrations of erucic and linolenic acids in seed oil of Brassica napus L.

Cited by 30 publications

References 0 publications

QTL analysis of an intervarietal set of substitution lines in Brassica napus: (i) Seed oil content and fatty acid composition

QTL analysis of an intervarietal set of substitution lines in Brassica napus: (i) Seed oil content and fatty acid composition

Erucic acid rapeseed: 1. Prospects of improvements

RFLP linkage analysis and mapping genes controlling the fatty acid profile of Brassica juncea using reciprocal DH populations

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