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.

Oac triton spring rapeseed

Abstract: OAC Triton is the first licensed, triazine-resistant spring rapeseed (Brassica napus L.). It produces seed low in erucic acid and glucosinolate content. Yield levels have averaged approximately 80% of Regent and oil content has averaged 2.4% less than Regent. OAC Triton is expected to be used where rapeseed production is restricted or inhibited by serious cruciferous weed infestations, other triazine-susceptible weed problems, or by atrazine herbicide residues.Key words: Rapeseed, triazine-resistant, Brassica napus L., canola, cultivar description

Proteins from double-zero rapeseed

Abstract: Solubility profiles of protein, phytic acid, and glucosinolates in aqueous electrolytes of varying pH were found to be similar for defatted meals from two varieties of double-zero (low glucosinolate/low erucic acid) rapeseed (Brassica napus) and conventional Chinese rapeseed (Brassica juncea). The amino acid compositions of the meals and protein isolates indicate favorable nutritive value of such products

Transcriptome Profile Analysis of Winter Rapeseed (Brassica napus L.) in Response to Freezing Stress, Reveal Potentially Connected Events to Freezing Stress.

Abstract: Winter rapeseed is not only an important oilseed crop, but also a winter cover crop in Northern China, where its production was severely limited by freezing stress. As an overwinter crop, the production is severely limited by freezing stress. Therefore, understanding the physiological and molecular mechanism of winter rapeseed (Brassica napus L.) in freezing stress responses becomes essential for the improvement and development of freezing-tolerant varieties of Brassica napus. In this study, morphological, physiological, ultrastructure and transcriptome changes in the Brassica napus line “2016TS(G)10” (freezing-tolerance line) that was exposed to –2 °C for 0 h, 1 h, 3 h and 24 h were characterized. The results showed that freezing stress caused seedling dehydration, and chloroplast dilation and degradation. The content of malondialdehyde (MDA), proline, soluble protein and soluble sugars were increased, as well as the relative electrolyte leakage (REL) which was significantly increased at frozen 24 h. Subsequently, RNA-seq analysis revealed a total of 98,672 UniGenes that were annotated in Brassica napus and 3905 UniGenes were identified as differentially expressed genes after being exposed to freezing stress. Among these genes, 2312 (59.21%) were up-regulated and 1593 (40.79%) were down-regulated. Most of these DEGs were significantly annotated in the carbohydrates and energy metabolism, signal transduction, amino acid metabolism and translation. Most of the up-regulated DEGs were especially enriched in plant hormone signal transduction, starch and sucrose metabolism pathways. Transcription factor enrichment analysis showed that the AP2/ERF, WRKY and MYB families were also significantly changed. Furthermore, 20 DEGs were selected to validate the transcriptome profiles via quantitative real-time PCR (qRT-PCR). In conclusion, the results provide an overall view of the dynamic changes in physiology and insights into the molecular regulation mechanisms of winter Brassica napus in response to freezing treatment, expanding our understanding on the complex molecular mechanism in plant response to freezing stress.

Toxicity of rapeseed meal and its use as a protein supplement in the diet of two hybrid strains of caged laying hens

Abstract: An experiment is described in which extracted Algerian rapeseed meal was included at levels of 4, 8, 12, 16 and 20% in the diet of two hybrid strains of caged laying hens. The rapeseed meal was thyrotoxic and this effect, when assessed by thyroid weight per kg of body weight, was more marked for the light-weight hybrid than for the medium-weight hybrid birds. The light-weight hybrids exhibited a high mortality when fed rapeseed meal at a level of 8 % or above in the diet but inclusion of rapeseed meal did not cause increased mortality in the medium-weight hybrids. The medium-weight hybrids gave satisfactory egg production when fed up to 16% of dietary rapeseed meal; food conversion efficiency was best with 8% of dietary rapeseed meal, and metabolisable energy conversion (Meal/kg eggs) and the efficiency of utilisation of protein were, satisfactory at all levels of rapeseed meal inclusion. The rapeseed meal used had a standard metabolisable energy content of 1820 kcal/kg at a dry matter content of 89 %.

Environmental and Varietal Influences on the Fatty Acid Composition of Rapeseed, Soybeans and Sunflowers

Abstract: The fatty acid (FA) composition of oil crops is of some importance under technological as well as under nutritional aspects. The influence of temperature on this parameter in rapeseed, soybeans and sunflowers was investigated under practical agricultural conditions, whereby varietal variations were taken into account. The analysed plant material originated from variety testing trials located in different climatic zones of Austria. As a measure of the climatic conditions of a location, the mean temperature of the last 30 days before harvest was calculated. Despite the low temperature differences between the various locations, moderate but significant negative correlations between temperature and the share of linolenic (18: 3), respectively, linoleic (18: 2) acid on the whole quantity of FAs in rapeseed (R 2 = 0.18-0.42), soybeans (R 2 = 0.11-0.13) and sunflowers (R 2 = 0.15) were found. Furthermore, there was a good negative correlation in the case of sunflower seeds between temperature and oil level (R 2 = 0.45). The environmental influence on the share of polyunsaturated FAs differed between the different species. The results show that quality of vegetable oils is as well a question of environment as of variety.