Integrated analysis of phenome, genome, and transcriptome of hybrid rice uncovered multiple heterosis-related loci for yield increase
| Autor: | Dayong Li, Ming Zhou, Longping Yuan, Xiaofeng Cao, Shuhui Song, Aihong Li, Jun Yu, Caiyan Chen, Mingfeng Tang, Guozhen Liu, Dongmei Tian, Bingran Zhao, D. Mao, Chengzhi Liang, Qi Wu, Songnian Hu, Yeyun Xin, Shigui Li, Xue Liu, Tingting Chen, Lihuang Zhu, Zhiyuan Huang, Xianwei Song, Qiming Lv, Xiqin Fu |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
0301 basic medicine Candidate gene Genotype Heterosis Genetic Linkage Quantitative Trait Loci Biology Quantitative trait locus Phenome Genes Plant 01 natural sciences Genome Polymorphism Single Nucleotide Transcriptome 03 medical and health sciences Phenomics Quantitative Trait Heritable Gene Expression Regulation Plant Hybrid Vigor Alleles Panicle Genetics Multidisciplinary business.industry Gene Expression Profiling food and beverages Chromosome Mapping Oryza Genomics Biotechnology 030104 developmental biology Phenotype PNAS Plus Hybridization Genetic business Genome Plant 010606 plant biology & botany |
| Popis: | Hybrid rice is the dominant form of rice planted in China, and its use has extended worldwide since the 1970s. It offers great yield advantages and has contributed greatly to the world’s food security. However, the molecular mechanisms underlying heterosis have remained a mystery. In this study we integrated genetics and omics analyses to determine the candidate genes for yield heterosis in a model two-line rice hybrid system, Liang-you-pei 9 (LYP9) and its parents. Phenomics study revealed that the better parent heterosis (BPH) of yield in hybrid is not ascribed to BPH of all the yield components but is specific to the BPH of spikelet number per panicle (SPP) and paternal parent heterosis (PPH) of effective panicle number (EPN). Genetic analyses then identified multiple quantitative trait loci (QTLs) for these two components. Moreover, a number of differentially expressed genes and alleles in the hybrid were mapped by transcriptome profiling to the QTL regions as possible candidate genes. In parallel, a major QTL for yield heterosis, rice heterosis 8 (RH8), was found to be the DTH8/Ghd8/LHD1 gene. Based on the shared allelic heterozygosity of RH8 in many hybrid rice cultivars, a common mechanism for yield heterosis in the present commercial hybrid rice is proposed. |
| Databáze: | OpenAIRE |
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