Genome‐wide association study reveals new genes involved in leaf trichome formation in polyploid oilseed rape (Brassica napus L.)

• DOI: 10.1111/pce.13694
• Publication Date: 2019-12-31T01:53:13Z
• Authors: Lijie Xuan; Tao Yan; Lingzhi Lu; Xinze Zhao; Dezhi Wu; Shuijin Hua; Lixi Jiang
• Keywords: Trichome; Leaflet (botany); Polyploid

Abstract Leaf trichomes protect against various biotic and abiotic stresses in plants. However, there is little knowledge about this trait oilseed rape ( Brassica napus ). Here, we demonstrated that hairy leaves were less attractive to Plutella xylostella larvae than glabrous leaves. We established a core germplasm collection with 290 accessions for genome‐wide association study (GWAS) of the leaf trichome rape. compared transcriptomes shoot apical meristem (SAM) between hairy‐ glabrous‐leaf genotypes narrow down candidate genes identified by GWAS. The single nucleotide polymorphisms different transcript levels BnaA . GL1 , BnaC SWEET4 WAT1 b corresponded divergence phenotypes, indicating role sugar and/or auxin signalling initiation. hairy‐leaf SAMs had lower glucose sucrose contents but higher expression putative responsive factors SAMs. Spraying exogenous (8 μm) increased number certain genotypes, whereas spraying (1%) plus (6%) slightly repressed These data contribute existing genetic control would assist breeding towards desired surface type