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The rice Os03g0597200 was reported as YSA in 2012 [1] by researchers from China.

Annotated Information

  • Os03g0597200 <=> YSA,OsYSA,


  • Map-based cloning revealed that YSA encodes a PPR protein with 16 tandem PPR motifs.
  • The researchers demonstrated that YSA can be used as an early marker for efficient identification and elimination of false hybrids in commercial hybrid rice production, resulting in yield increases by up to approximately 537 kg ha 21 .


  • YSA is highly expressed in young leaves and stems, and its expression level is regulated by light.

Phenotypic analysis

  • The researchers showed that the YSA mutation has no apparent negative effects on several important agronomic traits, such as fertility, stigma extrusion rate, selfed seed-setting rate, hybrid seed-setting rate, and yield heterosis under normal growth conditions.

Figure 1. Phenotypic analysis of the ysa mutant plants. A to C, Phenotypes of Pei’ai64S (left) and ysa mutant (right) seedlings at 1 (A), 2 (B), and 3 (C) weeks after sowing.[1].

Labs working on this gene

  • National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing 100081, People’s Republic of China (N.S., F.-Q.W., G.-L.F., Y.L., X.-L.C.,X.Z., X.-P.G., Z.-J.C., C.-L.L., H.W., J.-M.W.);
  • National Key Laboratory for Crop Genetics and Germplasm Enhancement, Nanjing Agricultural University, Nanjing 210095, People’s Republic of China (M.-L.H., L.J., J.-M.W.);
  • Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, People’s Republic of China (M.-L.H., C.-K.Q.);
  • State Key Laboratory of Rice Biology, International Atomic Energy Agency Collaborating Center, Institute of Nuclear Agricultural Sciences, Zhejiang University, Hangzhou 310029,People’s Republic of China (D.-X.W., X.-L.S.)


  1. 1.0 1.1 Su, Ning, et al. "Disruption of a rice pentatricopeptide repeat protein causes a seedling-specific albino phenotype and its utilization to enhance seed purity in hybrid rice production." Plant physiology 159.1 (2012): 227-238.

Structured Information