Canola: oil content and architecture
Date
Monday 24 July 2017
Time
15:30-16:30 (AEST)
Venue
CSIRO: Black Mountain – Building 1 Lecture Theatre
Speakers
Dr Ming Zheng, Oil Crops Research Institute, Chinese Academy of Sciences, Wuhan, China
Dr Zhi-Yong Hu, Oil Crops Research Institute, Chinese Academy of Sciences, Wuhan, China
Synopsis
1) Title: The progress of the study on construction of ideal plant architecture in rapeseed (Brassica napus L.) – Dr Ming Zheng
Rapeseed plant architecture is a crucial determinant of its yield and itself is determined by plant height (PH) and branch number (BN), as well as inflorescence morphology, which indirectly influences its yield by affecting number of siliques per plant. Our studies are focus on the regulation of two major factors, PH and BN. We performed our studies with three approaches to study the mechanism of PH and BN regulation, i), identified several candidate QTLs for control of PH and BN by GWAS; ii), constructed the mutagenesis library and studied the function of mutant genes; iii), edited the Arabidopsis homologous genes related PH and BN regulation in rapeseed by CRISPR-cas9. Our studies would reveal novel insight into the genetic control of plant architecture and may facilitate marker-based breeding to improve plant architecture in order to increase rapeseed yield.
2) Maternal control of crop filial seed traits: a case study on seed weight and oil content in Brassica napus – Dr Zhi-Yong Hu
Many crop seed traits such as seed weight, oil content etc. are formed in the embryonic development, which are also the results of the interaction with the maternal plant. In our study, the genetic crossing results have showed that maternal genotypes contribute the most to the seed weight and oil content in Brassica napus. For seed oil content, we revealed 4 maternal controlling pathways including silique wall photosynthesis and cytoplasmic effects, etc. For seed weight, we located one QTL which influenced the silique length and seed weight as well. After fine mapping, we identified the functional gene. Our transgenic and molecular experiments demonstrated that the gene affected seed weight by regulating the silique length, which is a type of maternal regulation. The knowledge acquired in the study would broaden our research thought for the seed traits.
This is a public seminar.
NO visitor pass is required for non-CSIRO attendees going to Discovery Lecture Theatre or Building 1 Lecture Theatre