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.

Inheritance of fatty acid composition in winter forms of rapeseed, brassica napus

Abstract: The transfer of the zero erucic acid characteristic from spring to winter rapeseed (Brassica napus L.) and the identification of a new allele determining the erucic acid level in rapeseed oil are reported. Fatty acid analysis of F2 seed from the cross zero × low (7%) erucic acid winter rapeseed parents supported the hypothesis that, in these strains, one gene pair governs the level of erucic acid, and that each, allele contributes approximately 3.5% erucic and 6% eicosenoic acid to the seed oil. Gene action is similar to other alleles in this series, in that the genes display no dominance and act in an additive manner. The long-chain fatty acids, erucic and eicosenoic, were each significantly negatively correlated with the 18 carbon fatty acids, oleic and linoleic. Within each of the three F2 genotypes, correlation coefficients between oleic and linoleic were also negative and significant.

Effect of Timing of Sulfur Fertilizer Application on Growth and Yield of Rapeseed

Abstract: There is usually a positive yield response when sulfur (S) is applied to rapeseed (Brassica rapa L) plants grown on S-deficient soils Recommendations include application of some of or the entire amount of S at planting, but the plant requirement as well as availability of S to rapeseed during its various phenological stages is not well documented In a field trial, 40 kg S ha−1 was applied as gypsum (CaSO4·2H2O) at planting (T1), during vegetative (T2, 30 days after sowing), flowering (T3, 50 days after sowing), and pod-filling (T4, 65 days after sowing) stages, and in split doses (T5) Biomass accumulation, leaf-area index, and leaf photosynthetic rate were studied at various growth stages Seed S (sulfate and organic S) and yield parameters were studied at harvest Sulfur (40 kg S ha− 1) applied in three split doses during different growth stages caused maximum increase in these parameters, followed by T2 and T1 However, no significant discernable difference was observed for the application

Temperature effects on seed color in black- and yellow-seeded rapeseed

Abstract: The effects of growth temperature on seed color of two black- and four yellow-seeded doubled-haploid genotypes of Brassica napus were examined with plants grown at 16/12, 18/14, 20/16, 22/18 and 24/20 °C (day/night). High temperatures significantly reduced seed color that developed on yellow-seeded genotypes but did not alter seed color produced on black-seeded genotypes. The decrease in pigmentation measured with a modified near-infrared reflectance analyzer was linearly related to temperature for the yellow-seeded genotypes. Significant differences in the magnitudes of the response were observed among the yellow-seeded genotypes. This is the first systematic study of temperature effects on seed color in rapeseed. The results confirm previous preliminary reports of environmental modifications of this trait. The study also illustrates a method for determining temperature effects on seed-color expressivity that may be useful for plant breeding programs. Key words: Temperature, Brassica napus, seed color

Integration of omics approaches to understand oil/protein content during seed development in oilseed crops

Abstract: Oilseed crops, especially soybean (Glycine max) and canola/rapeseed (Brassica napus), produce seeds that are rich in both proteins and oils and that are major sources of energy and nutrition worldwide Most of the nutritional content in the seed is accumulated in the embryo during the seed filling stages of seed development Understanding the metabolic pathways that are active during seed filling and how they are regulated are essential prerequisites to crop improvement In this review, we summarize various omics studies of soybean and canola/rapeseed during seed filling, with emphasis on oil and protein traits, to gain a systems-level understanding of seed development Currently, most (80–85%) of the soybean and rapeseed reference genomes have been sequenced (950 and 850 megabases, respectively) Parallel to these efforts, extensive omics datasets from different seed filling stages have become available Transcriptome and proteome studies have detected preponderance of starch metabolism and glycolysis enzymes to be the possible cause of higher oil in B napus compared to other crops Small RNAome studies performed during the seed filling stages have revealed miRNA-mediated regulation of transcription factors, with the suggestion that this interaction could be responsible for transitioning the seeds from embryogenesis to maturation In addition, progress made in dissecting the regulation of de novo fatty acid synthesis and protein storage pathways is described Advances in high-throughput omics and comprehensive tissue-specific analyses make this an exciting time to attempt knowledge-driven investigation of complex regulatory pathways