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.

Relationships Between Yield and Yield Components on Currently Improved Spring Rapeseed Cultivars

Abstract: This research was conducted in Erzurum in 1991 and 1992 seasons using 14 spring oilseed rape ( Brassica napus ssp. oleifera L.) cultivars in order to investigate the relationships between yield and yield components by correlation and path analyses. Positive values were obtained in both seasons between seed yield and the characters: days to flowering, plant height, number of branch, number of pods per plant, number of seeds per pod, pod diameter, pod length, 1000-seed weight, and oil content. However, seed yield was significantly and positive correlated with only number of pod per plant and 1000-seed weight in both seasons. Relationship between oil content and protein content was negative. Path analysis identified 1000-seed weight as having the greatest effect on seed yield, with number of pods per plant having a large secondary effect.

Protein composition of oil bodies from mature Brassica napus seeds.

Abstract: Seed oil bodies (OBs) are intracellular particles storing lipids as food or biofuel reserves in oleaginous plants. Since Brassica napus OBs could be easily contaminated with protein bodies and/or myrosin cells, they must be purified step by step using floatation technique in order to remove non-specifically trapped proteins. An exhaustive description of the protein composition of rapeseed OBs from two double-zero varieties was achieved by a combination of proteomic and genomic tools. Genomic analysis led to the identification of sequences coding for major seed oil body proteins, including 19 oleosins, 5 steroleosins and 9 caleosins. Most of these proteins were also identified through proteomic analysis and displayed a high level of sequence conservation with their Arabidopsis thaliana counterparts. Two rapeseed oleosin orthologs appeared acetylated on their N-terminal alanine residue and both caleosins and steroleosins displayed a low level of phosphorylation.

Yield and yield components of rapeseed as influenced by water stress at different growth stages and nitrogen levels.

Abstract: Irrigated rapeseed (Brassica napus L.) cultivation is currently expanding in rotation with winter cereals in Iran where its reproductive growth is often exposed to water deficit in many parts, particularly in the south. A two growing seasons (2006-2008) field experiment was conducted at the Experimental Research Center, Shiraz University to study the effects of water stress at different growth stages (Normal irrigation at all growth stages (control), water stress at flowering, at pod development and at seed filling stages) and nitrogen (N) levels (0, 75, 150 and 225 kg ha ) on yield and yield components of rapeseed (Telayeh cultivar). The design was split -1 plots arranged in randomized complete block with four replications. Full irrigation and the highest N level had the highest plant height, number of branches per plant, pods per plant, seed and oil yields. However, increased N levels decreased seed oil content and had no significant effect on 1000-seed weight. Flowering was the most sensitive stage for water stress damage resulting a drastic reduction in seed and oil yields by 29.5% and 31.7%, respectively. Pods per plants was the most sensitive yield components to water stress during reproductive growth in both year and it had the highest significant positive correlation with seed and biological yields. The seed and oil yields of the 1 season were more than the 2 season due to favorable weather conditions for st nd growth. Overall, supplying sufficient water to rapeseed crop, particularly at flowering and pod formation, in comparison with 225 kg ha of N fertilizer are important to produce higher yields. -1