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

Overview

Journal Plant Physiol

Specialty Physiology

Date 2020 Jun 3

PMID 32482908

Citations 25

Authors

Juan Huang

Gang Lu

Lei Liu

Mohammad Sharif Raihan

Jieting Xu

Liumei Jian

Lingxiao Zhao

Thu M Tran

Qinghua Zhang

Jie Liu

Wenqiang Li

Cunxu Wei

David M Braun

Qing Li

Alisdair R Fernie

David Jackson

Jianbing Yan

Affiliations

Soon will be listed here.

Abstract

In maize (), kernel weight is an important component of yield that 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 (QTLs) underlying quantitative variation in kernel weight have been cloned. Here, we characterize a QTL, , associated with maize kernel weight. This QTL encodes a DYW motif pentatricopeptide repeat protein involved in C-to-U editing of , a subunit of the chloroplast NADH dehydrogenase-like complex. In a null background, C-to-U editing of was abolished, and photosynthesis was reduced, resulting in less maternal photosynthate available for grain filling. Characterization of highlights the importance of optimizing photosynthesis for maize grain yield production.

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