| Categories genes  | Tags panicle  grain  grains per panicle  grain yield  yield  architecture  auxin  breeding  auxin transport  plant architecture 
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  • Key message
    • Transgenic plants over-expressing PAY1 had twice the number of grains per panicle and consequently produced nearly 38% more grain yield per plant than control plants
    • PAY1 improves plant architecture and enhances grain yield in rice.
    • Furthermore, introgression of PAY1 into elite rice cultivars, using marker-assisted background selection, dramatically increased grain yield compared with the recipient parents
    • Mechanistically, PAY1 could improve plant architecture via affecting polar auxin transport activity and altering endogenous indole-3-acetic acid distribution
    • Overall, these results demonstrated that PAY1 could be a new beneficial genetic resource for shaping ideal plant architecture and breeding high-yielding rice varieties
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