Deletion of the gene encoding the magnesium chelatase I subunit resulted in a novel wheat leaf colour mutant.

ABSTRACT: Leaf colour mutants are ideal germplasm resources for investigating the mechanisms of chlorophyll (Chl) synthesis, chloroplast development and photosynthesis. In this study, we obtained a yellow-leaf mutant, designated SN288-2. The variant presented a yellow-leaf phenotype and halted the development of chloroplasts at the seedling stage, with reduced accumulation of Chl. The yellow-leaf phenotype reverted to the normal phenotype in the wheat revival stage. In addition, the ratio of the crucial Chl precursors protoporphyrin IX (Proto IX) and Mg-protoporphyrin IX (Mg-Proto IX) was relatively high in yellow leaves. Bulked segregant analysis sequencing (BSA-Seq) revealed that the aberrant phenotype was controlled by two recessive genes located on chromosomes 7A and 7D, designated Y1-7A and Y2-

SUBMITTER: Qi F 

PROVIDER: S-EPMC12483974 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature