首页|A novel Effective Panicle Number per Plant 4 haplotype enhances grain yield by coordinating panicle number and grain number in rice

A novel Effective Panicle Number per Plant 4 haplotype enhances grain yield by coordinating panicle number and grain number in rice

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Increasing effective panicle number per plant(EPN)is one approach to increase yield potential in rice.However,molecular mechanisms underlying EPN remain unclear.In this study,we integrated map-based cloning and genome-wide association analysis to identify the EPN4 gene,which is allelic to NARROW LEAF1(NAL1).Overexpression lines containing the Teqing allele(TQ)of EPN4 had significantly increased EPN.NIL-EPN4TQ in japonica(geng)cultivar Lemont(LT)exhibited significantly improved EPN but decreased grain number and flag leaf size relative to LT.Haplotype analysis indicated that accessions with EPN4-1 had medium EPN,medium grain number,and medium grain weight,but had the highest grain yield among seven haplotypes,indicating that EPN4-1 is an elite haplotype of EPN4 for positive coordination of the three components of grain yield.Furthermore,accessions carrying the combination of EPN4-1 and haplotype GNP1-6 of GNP1 for grain number per panicle showed higher grain yield than those with other allele combinations.Therefore,pyramiding of EPN4-1 and GNP1-6 could be a preferred approach to obtain high yield potential in breeding.

RiceEffective panicle number per plantGrain number per panicleHaplotypeGrain yield potential

Yun Wang、Xiaoqian Wang、Laiyuan Zhai、Sundus Zafar、Congcong Shen、Shuangbing Zhu、Kai Chen、Jianlong Xu

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State Key Laboratory of Crop Gene Resources and Breeding,Institute of Crop Sciences,Chinese Academy of Agricultural Sciences,Beijing 100081,China

State Key Laboratory of Crop Biology,College of Agronomy,Shandong Agricultural University,Tai'an 271018,Shandong,China

Shenzhen Branch,Guangdong Laboratory for Lingnan Modern Agriculture,Agricultural Genomics Institute at Shenzhen,Chinese Academy of Agricultural Sciences,Shenzhen 518120,Guangdong,China

National Nanfan Research Institute(Sanya),Chinese Academy of Agricultural Sciences,Sanya 572024,Hainan,China

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National Key Research and Development Program of ChinaShenzhen Basic Research and Development Key Program of ChinaHainan Key Research and Development in Modern Agriculture of China

2023YFF1000404JCYJ20200109150713553ZDYF2021Y128

2024

10.1016/j.cj.2023.11.003

作物学报(英文版)

作物学报(英文版)

CSTPCD
ISSN：
年,卷(期)：2024.12(1)
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