Construction of a Quantitative Genomic Map, Identification and Expression Analysis of Candidate Genes for Agronomic and Disease-Related Traits in Brassica napus

Frontiers in Plant Science

Jianjie He¹  Yongtai Yin¹  Maoteng Li¹  Nadia Raboanatahiry¹  Huaixin Li¹  Hongbo Chao² 

[1]Department of Biotechnology, College of Life Science and Technology, Huazhong University of Science and Technology, Wuhan, China

[2]School of Agricultural Sciences, Zhengzhou University, Zhengzhou, China

关键词: Brassica napus;    quantitative genomic map;    oil content;    seed yield;    disease;    candidate genes;   

DOI  :  10.3389/fpls.2022.862363

来源: DOAJ

【 摘 要 】

Rapeseed is the second most important oil crop in the world. Improving seed yield and seed oil content are the two main highlights of the research. Unfortunately, rapeseed development is frequently affected by different diseases. Extensive research has been made through many years to develop elite cultivars with high oil, high yield, and/or disease resistance. Quantitative trait locus (QTL) analysis has been one of the most important strategies in the genetic deciphering of agronomic characteristics. To comprehend the distribution of these QTLs and to uncover the key regions that could simultaneously control multiple traits, 4,555 QTLs that have been identified during the last 25 years were aligned in one unique map, and a quantitative genomic map which involved 128 traits from 79 populations developed in 12 countries was constructed. The present study revealed 517 regions of overlapping QTLs which harbored 2,744 candidate genes and might affect multiple traits, simultaneously. They could be selected to customize super-rapeseed cultivars. The gene ontology and the interaction network of those candidates revealed genes that highly interacted with the other genes and might have a strong influence on them. The expression and structure of these candidate genes were compared in eight rapeseed accessions and revealed genes of similar structures which were expressed differently. The present study enriches our knowledge of rapeseed genome characteristics and diversity, and it also provided indications for rapeseed molecular breeding improvement in the future.

【 授权许可】

Unknown