Evidence map›Paper›PMID 18678896›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2008

A triallelic system of S5 is a major regulator of the reproductive barrier and compatibility of indica-japonica hybrids in rice.

Jiongjiong Chen, Jihua Ding, Yidan Ouyang, Hongyi Du, Jiangyi Yang, Ke Cheng, Jie Zhao, Shuqing Qiu, Xuelian Zhang, Jialing Yao and 10 more

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 128 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
128citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

128 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Guideline
  2. Review
  3. Review
  4. Article
  5. Evolutionary histories of functional mutations during the domestication and spread ofProceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  6. Article
  7. Article
  8. Molecular and physiological basis of heterosis in hybrid rice performance.Molecular breeding : new strategies in plant improvement · 2025
    Review
  9. Article
  10. Article
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  12. Article
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  18. Characterization and fine-mapping of a new Asian rice selfish genetic locus S58 in Asian-African rice hybrids.TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik · 2023
    Article
  19. Review
  20. Article

68 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

20 authors.

Jiongjiong ChenNational Key Laboratory of Crop Genetic Improvement and National Centre of Plant Gene Research, Huazhong Agricultural University, Wuhan 430070, China.
Jihua Ding
Yidan Ouyang
Hongyi Du
Jiangyi Yang
Ke Cheng
Jie Zhao
Shuqing Qiu
Xuelian Zhang
Jialing Yao
Kede Liu
Lei Wang
Caiguo Xu
Xianghua Li
Yongbiao Xue
Mian Xia
Qing Ji
Jufei Lu
Mingliang Xu
Qifa Zhang

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Hybrid sterility is a major form of postzygotic reproductive isolation. Although reproductive isolation has been a key issue in evolutionary biology for many decades in a wide range of organisms, only very recently a few genes for reproductive isolation were identified. The Asian cultivated rice (Oryza sativa L.) is divided into two subspecies, indica and japonica. Hybrids between indica and japonica varieties are usually highly sterile. A special group of rice germplasm, referred to as wide-compatibility varieties, is able to produce highly fertile hybrids when crossed to both indica and japonica. In this study, we cloned S5, a major locus for indica-japonica hybrid sterility and wide compatibility, using a map-based cloning approach. We show that S5 encodes an aspartic protease conditioning embryo-sac fertility. The indica (S5-i) and japonica (S5-j) alleles differ by two nucleotides. The wide compatibility gene (S5-n) has a large deletion in the N terminus of the predicted S5 protein, causing subcellular mislocalization of the protein, and thus is presumably nonfunctional. This triallelic system has a profound implication in the evolution and artificial breeding of cultivated rice. Genetic differentiation between indica and japonica would have been enforced because of the reproductive barrier caused by S5-i and S5-j, and species coherence would have been maintained by gene flow enabled by the wide compatibility gene.

Indexed as

AllelesGene FlowBase SequenceBreedingChimeraCloning, MolecularMolecular Sequence DataOryzaPlant InfertilityQuantitative Trait LociSpecies Specificity

Identifiers

PMID18678896
PMCPMC2516230

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.