Comprehensive panicle phenotyping reveals that qSrn7/FZP influences higher-order branching

Rice grain number directly affects crop yield. Identifying alleles that improve panicle architecture would greatly aid the development of high-yield varieties. Here, we show that the quantitative trait locus qSrn7 contains rice FRIZZY PANICLE ( FZP ), a previously reported gene encoding an ERF trans...

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Bibliographic Details
Published in:Scientific reports 2018-08, Vol.8 (1), p.12511-9, Article 12511
Main Authors: Fujishiro, Yasuko, Agata, Ayumi, Ota, Sadayuki, Ishihara, Ryota, Takeda, Yasumi, Kunishima, Takeshi, Ikeda, Mayuko, Kyozuka, Junko, Hobo, Tokunori, Kitano, Hidemi
Format: Article
Language:English
Subjects:
45
631/449/1870
631/449/711
Agricultural production
Alleles
Chromosomes
Crop yield
Cultivars
Gene mapping
Genes
Genotype & phenotype
Genotypes
Grain
Humanities and Social Sciences
multidisciplinary
Phenotyping
Plant breeding
Quantitative trait loci
Rice
Science
Science (multidisciplinary)
Transcription factors
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Summary:Rice grain number directly affects crop yield. Identifying alleles that improve panicle architecture would greatly aid the development of high-yield varieties. Here, we show that the quantitative trait locus qSrn7 contains rice FRIZZY PANICLE ( FZP ), a previously reported gene encoding an ERF transcription factor that promotes floral transition. Reduced expression of FZP in the reproductive stage increases the extent of higher order branching of the panicle, resulting in increased grain number. Genotype analysis of this gene in cultivars from the publicly available National Institute of Agrobiological Sciences (NIAS) Core Collection demonstrated that the extent of higher order branching, especially in the upper panicle, was increased in those cultivars carrying the FZP allele associated with qSrn7 . Furthermore, chromosome segment substitution lines resulting from a cross between Koshihikari and Kasalath, the latter of which carries qSrn7/FZP , also showed that upper panicle higher order branching and grain yield were increased by qSrn7/FZP . Our findings indicate that qSrn7/FZP influences panicle branching pattern and is thus useful in the breeding of high-yield rice varieties.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-018-30395-9