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Rapeseed

About: Rapeseed is a research topic. Over the lifetime, 2945 publications have been published within this topic receiving 51790 citations. The topic is also known as: Brassica napus & rape.


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Journal ArticleDOI
TL;DR: Rapeseed has been introduced recently in Southern Ontario and, although the spring-planted crop is canola quality, the winter crop, which makes up 20% of the production, is still high in glucosinolates.
Abstract: Since the introduction of low glucosinolate rapeseed into Canadian production in 1975, the average level of glucosinolates has declined from about 80 µmol/g to 25 µmol/g in the 1985 Canadian new crop. Since 1983, more than 90% of the rapeseed planted in Western Canada has been of canola quality (less than 30 µmol/g glucosinolates). The Northern Alberta/British Columbia growing area is the only area in Western Canada which produced noncanola quality seed in 1984. Export shipments of rapeseed from Western Canada have not contained more than 30 µmol/g glucosinolates since December 1983, and at the end of the 1984/85 shipping year most shipments contained about 20 µmol/g glucosinolates. Western Canadian crushing plants have preferentially selected and crushed canola quality seed since 1979. This preferential selection may have slowed the reduction of glucosinolates in export seed. Crushers have produced canola quality meal from seed containing as much as 50 µmol/g glucosinolates, since between 40 and 60% of the glucosinolates present in the seed were removed during processing. Rapeseed has been introduced recently in Southern Ontario. Although the spring-planted crop is canola quality, the winter crop, which makes up 20% of the production, is still high in glucosinolates.

26 citations

Journal ArticleDOI
TL;DR: In this article, a three year investigation was carried out including thirty rapeseed genotypes, and the following traits were investigated: number of pods per plant, oil content, 1000 seed weight, pre-anthesis duration, post-antheses duration, seed yield/ha, and oil yield /ha.
Abstract: The objective of the investigation was to estimate interrelationship among rapeseed quantitative traits using simple regression coeffi cients, as well as to assess direct and indirect effects of specifi c traits to oil yield/ha via path analysis. Three year investigation was carried out including thirty rapeseed genotypes. The following traits were investigated: number of pods per plant, oil content, 1000 seed weight, pre-anthesis duration, post-anthesis duration, seed yield/ha and oil yield/ha. Almost complete correlation was determined between seed yield/ha and oil yield/ha and strong between oil content and oil yield/ha. The strongest direct effects to oil yield/ha was estimated for seed yield/ha, whereas other investigated traits showed low or no effect to oil yield/ha.

26 citations

Journal ArticleDOI
TL;DR: The results highlight the practical and scientific value of mrMLM or QTN detection and the accuracy of linking specific QTNs to fatty acids content, and suggest a useful strategy to improve the fatty acid content of B. napus seeds by molecular marker-assisted breeding.
Abstract: Brassica napus L. is a widely cultivated oil crop and provides important resources of edible vegetable oil, and its quality is determined by fatty acid composition and content. To explain the genetic basis and identify more minor loci for fatty acid content, the multi-locus random-SNP-effect mixed linear model (mrMLM) was used to identify genomic regions associated with fatty acid content in a genetically diverse population of 435 rapeseed accessions, including 77 winter-type, 55 spring-type, and 303 semi-winter-type accessions grown in different environments. A total of 149 quantitative trait nucleotides (QTNs) were found to be associated with fatty acid content and composition, including 34 QTNs that overlapped with the previously reported loci, and 115 novel QTNs. Of these, 35 novel QTNs, located on chromosome A01, A02, A03, A05, A06, A09, A10, and C02, respectively, were repeatedly detected across different environments. Subsequently, we annotated 95 putative candidate genes by BlastP analysis using sequences from Arabidopsis thaliana homologs of the identified regions. The candidate genes included 34 environmentally-insensitive genes (e.g., CER4, DGK2, KCS17, KCS18, MYB4, and TT16) and 61 environment-sensitive genes (e.g., FAB1, FAD6, FAD7, KCR1, KCS9, KCS12, and TT1) as well as genes invloved in the fatty acid biosynthesis. Among these, BnaA08g08280D and BnaC03g60080D differed in genomic sequence between the high- and low-oleic acid lines, and might thus be the novel alleles regulating oleic acid content. Furthermore, RT-qPCR analysis of these genes showed differential expression levels during seed development. Our results highlight the practical and scientific value of mrMLM or QTN detection and the accuracy of linking specific QTNs to fatty acid content, and suggest a useful strategy to improve the fatty acid content of B. napus seeds by molecular marker-assisted breeding.

26 citations

Journal ArticleDOI
TL;DR: Investigation of the effects of linolenic acid (LA) on oxidation stability of rapeseed oils showed that rapeseed oil with 5.9% LA was the most stable among four rapeeed oils, and increasing the LA content in rapeseed Oil can be considered as an efficient approach to solve the problem of insufficient LA intake globally.
Abstract: The objective of this study was to investigate the effects of linolenic acid (LA) on oxidation stability of rapeseed oils. Four kinds of rapeseed were harvested by unified cultivation and management in the same geographical conditions, and then four rapeseed oils with different contents of LA were obtained. The effects of linolenic acid and antioxidants (tocopherols and phytosterols) on oxidation stability of rapeseed oils were evaluated. Results showed that rapeseed oil with 5.9% LA was the most stable among four rapeseed oils, followed by commercial rapeseed oil, rapeseed oil with 8.4% LA and rapeseed oil with 10.8% LA. The oxidation stability was negatively correlated with the contents of LA (r = − 0.931, p 0.05). In addition, according to the European Union Standards, shelf-life of four rapeseed oils was longer than 30 days in the shelf-life test. Therefore, increasing the LA content in rapeseed oils can be considered as an efficient approach to solve the problem of insufficient LA intake globally.

26 citations

Book ChapterDOI
J. E. Thomzik1
01 Jan 1993
TL;DR: By virtue of its high oil content, B. napus is an important target for crop improvement and the transfer of genes with agronomically relevant qualities is a desirable goal for improving the agronomic character of oilseed rape varieties by genetic engineering.
Abstract: By virtue of its high oil content (40%) oilseed rape makes an important contribution to the world supply of edible oils. Rapeseed oil accounts for about 13% of the world production of edible oils, putting it in third place after soybean and palm. In addition, coarse colza meal, containing 38 to 45% high qualitiy protein, is the fourth most important source of protein animal feed (RFF 1986; Downey and Robbelen 1989). Thus, B. napus is an important target for crop improvement. The transfer of genes with agronomically relevant qualities is a desirable goal for improving the agronomic character of oilseed rape varieties by genetic engineering.

25 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20241
2023384
2022870
2021101
2020140
2019123