Cloning and functional analysis of the lobed-leaf gene BjA10.LL in Brassica juncea L.

ABSTRACT: Leaf shape plays a crucial role in plant growth and development. Among various leaf traits, marginal lobation serves as an ideal morphological marker for breeding programs. However, the genetic mechanism underlying leaf margin lobation in Brassica juncea L. remains unclear. Through RNA sequencing and map-based cloning, we identified an incompletely dominant gene, BjA10.LL, which encodes an HD-ZIP I protein and is responsible for the formation of leaf margin lobation in B. juncea. Sequence analysis of parental alleles revealed no critical variations in the coding region but identified substantial variations in regulatory regions. Heterologous expression of BjA10.LL in Arabidopsis thaliana confirmed its sufficiency to induce lobed leaves. To functionally link the regulatory variations to the

SUBMITTER: Liu J 

PROVIDER: S-EPMC12816491 | biostudies-literature | 2026 Jan

REPOSITORIES: biostudies-literature