Abstract
Rapeseed is one of important oil crops in China. Better understanding of the regulation network of main agronomic traits of rapeseed could improve the yielding of rapeseed. In this study, we obtained an influrescence mutant that showed a fusion phenotype, similar with the Arabidopsis clavata-like phenotype, so we named the mutant as Bnclavata-like (Bnclv-like). Phenotype analysis illustrated that abnormal development of the inflorescence meristem (IM) led to the fused-inflorescence phenotype. At the stage of protein abundance, major regulators in metabolic processes, ROS metabolism, and cytoskeleton formation were seen to be altered in this mutant. These results not only revealed the relationship between biological processes and inflorescence meristem development, but also suggest bioengineering strategies for the improved breeding and production of Brassica napus.
Highlights
As one of the four greatest oil crops in the world, Brassica napus L., plays a crucial role in world oil crops
We obtained a natural mutant in Ningyou 12 experimental field, which showed fused-inflorescence branching at the flowering stage (Figure 1), similar to the Arabidopsis clavata-like phenotype (Brand et al, 2000; Liu et al, 2009), we named the mutant as Bnclavata-like (Bnclvlike)
The Bnclv-like homozygote was obtained through self-crossing for five generations, which showed stable inheritance with no segregation of phenotypic traits was observed
Summary
As one of the four greatest oil crops in the world, Brassica napus L., plays a crucial role in world oil crops. First of all, rapeseed is an essential organic material for edible oil, and it is rich in fatty acids (such as linoleic acid, linolenic acid). Rapeseed meal is rich in protein, which is a potential source for the feed protein. Rapeseed stalks, like wheat and maize, can be used as raw materials for the production of new bio-energy and as an important energy crop. Rapeseed is a great source of nectar and ornamental plants (Wang et al, 2016). Because the three components of inflorescence structure (number of siliques per plant, number of seeds per silique and 1000-seed weight) is closely correlated with the seed yield in rapeseed, the discovery of optimal inflorescence structure will be helpful to improve the production of rapeseed (Chen et al, 2007; Lu et al, 2017; Zhang et al, 2018)
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