首页|A 48-bp deletion upstream of LIGULELESS 1 alters rice panicle architecture

A 48-bp deletion upstream of LIGULELESS 1 alters rice panicle architecture

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Panicle architecture is an agronomic determinant of crop yield and a target for cereal crop improvement.To investigate its molecular mechanisms in rice,we performed map-based cloning and characterization of OPEN PANICLE 1(OP1),a gain-of-function allele of LIGULELESS 1(LG1),controlling the spread-panicle phenotype.This allele results from a 48-bp deletion in the LG1 upstream region and promotes pulvinus development at the base of the primary branch.Increased OP1 expression and altered panicle phenotype in chimeric transgenic plants and upstream-region knockout mutants indicated that the deletion regu-lates spread-panicle architecture in the mutant spread panicle 1(sp1).Knocking out BRASSINOSTEROID UPREGULATED1(BU1)gene in the background of OP1 complementary plants resulted in compact panicles,suggesting OP1 may regulate inflorescence architecture via the brassinosteroid signaling pathway.We regard that manipulating the upstream regulatory region of OP1 or genes involved in BR signal pathway could be an efficient way to improve rice inflorescence architecture.

Upstream regionPanicle architectureGene expressionBRRice

Linhua Wu、Min Hu、Shuwei Lyu、Wenfeng Chen、Hang Yu、Qing Liu、Wei He、Chen Li、Zuofeng Zhu

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Rice Research Institute,Guangdong Academy of Agricultural Sciences,Guangzhou 510640,Guangdong,China

National Center for Evaluation of Agricultural Wild Plants(Rice),Department of Plant Genetics and Breeding,China Agricultural University,Beijing 100193,China

State Key Laboratory for Rice Biology and Breeding,China National Rice Research Institute,Hangzhou 310006,Zhejiang,China

Key Laboratory of Genetics and Breeding of High Quality Rice in Southern China(Co-construction by Ministry and Province),Ministry of Agriculture and Rural Affairs,Guangzhou 510640,Guangdong,China

Guangdong Key Laboratory of New Technology in Rice Breeding,Guangzhou 510640,Guangdong,China

Guangdong Rice Engineering Laboratory,Guangzhou 510640,Guangdong,China

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国家自然科学基金国家自然科学基金国家重点研发计划Guangdong Key Laboratory of New Technology in Rice Breeding

31925029314714572021YFD1200101-052020B1212060047

2024

10.1016/j.cj.2023.12.008

作物学报(英文版)

作物学报(英文版)

CSTPCD
ISSN：
年,卷(期)：2024.12(2)
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