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Copy number variation at the GL7 locus contributes to grain size diversity in rice
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Copy number variation at the GL7 locus contributes to grain size diversity in rice
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Journal Article
Copy number variation at the GL7 locus contributes to grain size diversity in rice
2015
Overview
Jiayang Li, Xudong Zhu, Qian Qian and colleagues report cloning of the
Grain Length on Chromosome 7
(
GL7
) locus in rice and identify a copy number variant that increases grain length and improves grain quality. They demonstrate how interactions with other grain length–related genes may be used to improve breeding.
Copy number variants (CNVs) are associated with changes in gene expression levels and contribute to various adaptive traits
1
,
2
. Here we show that a CNV at the
Grain Length on Chromosome 7
(
GL7
) locus contributes to grain size diversity in rice (
Oryza sativa
L.).
GL7
encodes a protein homologous to
Arabidopsis thaliana
LONGIFOLIA proteins, which regulate longitudinal cell elongation. Tandem duplication of a 17.1-kb segment at the
GL7
locus leads to upregulation of
GL7
and downregulation of its nearby negative regulator, resulting in an increase in grain length and improvement of grain appearance quality. Sequence analysis indicates that allelic variants of
GL7
and its negative regulator are associated with grain size diversity and that the CNV at the
GL7
locus was selected for and used in breeding. Our work suggests that pyramiding beneficial alleles of
GL7
and other yield- and quality-related genes may improve the breeding of elite rice varieties.
Publisher
Nature Publishing Group US,Nature Publishing Group
Subject
/ 38/23
/ 38/71
/ 38/77
/ 38/89
/ 38/90
/ 82
/ Animal Genetics and Genomics
/ Chromosomes, Plant - genetics
/ Gene Expression Regulation, Plant
/ Genes
/ letter
/ Microscopy, Electron, Scanning
/ Plant Proteins - classification
/ Plants, Genetically Modified
/ Quantitative Trait Loci - genetics
/ Rice
/ Sequence Homology, Amino Acid
