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.

Genome-Wide Analysis of Seed Acid Detergent Lignin (ADL) and Hull Content in Rapeseed (Brassica napus L.)

Abstract: A stable yellow-seeded variety is the breeding goal for obtaining the ideal rapeseed (Brassica napus L.) plant, and the amount of acid detergent lignin (ADL) in the seeds and the hull content (HC) are often used as yellow-seeded rapeseed screening indices. In this study, a genome-wide association analysis of 520 accessions was performed using the Q + K model with a total of 31,839 single-nucleotide polymorphism (SNP) sites. As a result, three significant associations on the B. napus chromosomes A05, A09, and C05 were detected for seed ADL content. The peak SNPs were within 9.27, 14.22, and 20.86 kb of the key genes BnaA.PAL4, BnaA.CAD2/BnaA.CAD3, and BnaC.CCR1, respectively. Further analyses were performed on the major locus of A05, which was also detected in the seed HC examination. A comparison of our genome-wide association study (GWAS) results and previous linkage mappings revealed a common chromosomal region on A09, which indicates that GWAS can be used as a powerful complementary strategy for dissecting complex traits in B. napus. Genomic selection (GS) utilizing the significant SNP markers based on the GWAS results exhibited increased predictive ability, indicating that the predictive ability of a given model can be substantially improved by using GWAS and GS.

Evaluating internal phosphorus requirement of rapeseed, chickpea, lentil, and wheat by seed analysis

Abstract: Foliar tissue in contrast to seed is considered a superior plant part for determining the nutrient‐element status of crops and soils. This study tested that generalization for oilseed, legume, and cereal crops. Internal phosphorus (P) requirements were estimated in pot culture experiments using a P deficient alkaline calcareous soil of Pakistan. The order of response (of grain yield) to P fertilization was rapeseed > wheat > lentil > chickpea. Phosphorus concentrations in whole shoots (≤ 30 cm) associated with 95% grain yields were: wheat and lentil, 0.28%; rapeseed, 0.27%; and chickpea, 0.18%. Critical P concentration in recently matured leaves were: chickpea, 0.39%; lentil, 0.33%; wheat, 0.30%; and rapeseed, 0.28%. Mature grains of crops, particularly of rape‐seed and chickpea, proved a good indicator tissue for evaluating P status of soils and plants. Phosphorus concentrations in seeds were associated with the P status of soil on which they grew. Internal P requirement in seeds were: rapeseed,...

Marker assisted selection of new high oleic and low linolenic winter oilseed rape (Brassica napus L.) inbred lines revealing good agricultural value.

Abstract: Development of oilseed rape (Brassica napus L.) breeding lines producing oil characterized by high oleic and low linolenic acid content is an important goal of rapeseed breeding programs worldwide. Such kind of oil is ideal for deep frying and can also be used as a raw material for biodiesel production. By performing chemical mutagenesis using ethyl methanesulfonate, we obtained mutant winter rapeseed breeding lines that can produce oil with a high content of oleic acid (C18:1, more than 75%) and a low content of linolenic acid (C18:3, less than 3%). However, the mutant lines revealed low agricultural value as they were characterized by low seed yield, low wintering, and high content of glucosinolates in seed meal. The aim of this work was to improve the mutant lines and develop high-oleic and low-linolenic recombinants exhibiting both good oil quality and high agronomic value. The plant materials used in this study included high-oleic and low-linolenic mutant breeding lines and high-yielding domestic canola-type breeding lines of good agricultural value with high oleic acid content and extremely low glucosinolates content. Field trials were conducted in four environments, in a randomized complete block design. Phenotyping was performed for wintering, yield of seed and oil, and seed quality traits. Genotype × environment interaction was investigated with respect to the content of C18:1 and C18:3 acids in seed oil. Genotyping was done for the selection of homozygous high oleic and low linolenic lines using allele-specific CAPS markers and SNaPshot assay, respectively. Finally, new high oleic and low linolenic winter rapeseed recombinant lines were obtained for use as a starting material for the development of new varieties that may be of high value on the oil crop market.