Effects of genes increasing the number of spikelets per panicle, TAW1 and APO1, on yield and yield-related traits in rice

Akira Fukushima, Hisatoshi Ohta, Narifumi Yokogami, Naoto Tsuda, Akiko Yoshida, Junko Kyozuka, Masahiko Maekawa

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3 Citations (Scopus)


The genes TAWAWA1 (TAW1) and ABERRANT PANICLE ORGANIZATION1 (APO1) increase the number of spikelets per panicle (SN). In the present study, we examined the effects of these genes on morphological traits, yield, and yield-related traits including yield components using the near-isogenic lines (NILs) in the genetic background of a japonica rice variety, Koshihikari – NIL-taw1, NIL-apo1-D3, and NIL-apo1-D4 – in a field experiment. The SN and total number of spikelets per area of the three NILs were larger than those of Koshihikari. However, the yield of the three NILs did not exceed that of Koshihikari due to their low filling ability. Interestingly, our field experiments indicated that TAW1 did not affect the diameter of internodes and the PN, whereas APO1 decreased the PN and increased the diameter of internodes. These results suggest that TAW1 and APO1 differently affect yield-related traits.

Original languageEnglish
Pages (from-to)1-5
Number of pages5
JournalPlant Production Science
Publication statusAccepted/In press - Aug 23 2017



  • panicle
  • rice
  • spikelet
  • TAWAWA1 (TAW1)
  • yield

ASJC Scopus subject areas

  • Agronomy and Crop Science

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