| Categories genes  | Tags pollen  temperature  panicle  seed  growth  domestication 
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  • Key message
    • Here we show that the domestication-related POLLEN TUBE BLOCKED 1 (PTB1), a RING-type E3 ubiquitin ligase, positively regulates the rice panicle seed setting rate by promoting pollen tube growth
    • Our results support the hypothesis that PTB1 is an important maternal sporophytic factor of pollen tube growth and a key modulator of the rice panicle seed setting rate
    • Natural variation in PTB1 regulates rice seed setting rate by controlling pollen tube growth
    • The natural variation in expression of PTB1 which is affected by the promoter haplotype and the environmental temperature, correlates with the rice panicle seed setting rate
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