The Kernel Size-Related Quantitative Trait Locus qKW9 Encodes a Pentatricopeptide Repeat Protein That Affects Photosynthesis and Grain Filling

Huang, J., Lu, G., Liu, L., Raihan, M.S., Xu, J., Jian, L., Zhao, L., Tran, T.M., Zhang, Q., Liu, J., Li, W., Wei, C., Braun, D.M., Li, Q., Fernie, A.R., Jackson, D., Yan, J. (June 2020) The Kernel Size-Related Quantitative Trait Locus qKW9 Encodes a Pentatricopeptide Repeat Protein That Affects Photosynthesis and Grain Filling. Plant Physiology. ISSN 0032-0889

URL: https://pubmed.ncbi.nlm.nih.gov/32482908/
DOI: 10.1104/pp.20.00374

Abstract

In maize (Zea mays), kernel weight is an important component of yield, which has been selected during domestication. Many genes associated with kernel weight have been identified through mutant analysis. Most are involved in the biogenesis and functional maintenance of organelles or other fundamental cellular activities. However, few quantitative trait loci (QTL) underlying quantitative variation in kernel weight have been cloned. Here, we characterize a QTL, qKW9, which is associated with maize kernel weight. This QTL encodes a DYW motif pentatricopeptide repeat protein involved in C-to-U editing of ndhB, a subunit of the chloroplast NADH dehydrogenase-like complex. In a null qkw9 background, C-to-U editing of ndhB was abolished, and photosynthesis was reduced, which resulted in less maternal photosynthate available for grain filling. Characterization of qKW9 highlights the importance of optimizing photosynthesis for maize grain yield production.

Item Type: Paper
CSHL Authors:
Communities: CSHL labs > Jackson lab
Depositing User: Adrian Gomez
Date: 1 June 2020
Date Deposited: 05 Jun 2020 13:34
Last Modified: 05 Jun 2020 13:34
Related URLs:
URI: https://repository.cshl.edu/id/eprint/39488

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