Isolation of a novel lodging resistance QTL gene involved in strigolactone signaling and its pyramiding with a QTL gene involved in another mechanism

Kenji Yano, Taiichiro Ookawa, Koichiro Aya, Yusuke Ochiai, Tadashi Hirasawa, Takeshi Ebitani, Takeshi Takarada, Masahiro Yano, Toshio Yamamoto, Shuichi Fukuoka, Jianzhong Wu, Tsuyu Ando, Reynante Lacsamana Ordonio, Ko Hirano, Makoto Matsuoka

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Lodging has been a major roadblock to attaining increased crop productivity. In an attempt to understand the mechanism for culm strength in rice, we isolated an effective quantitative trait locus (QTL), STRONG CULM3 (SCM3), the causal gene of which is identical to rice TEOSINTE BRANCHED1 (OsTB1), a gene previously reported to positively control strigolactone (SL) signaling. A near-isogenic line (NIL) carrying SCM3 showed enhanced culm strength and increased spikelet number despite the expected decrease in tiller number, indicating that SL also has a positive role in enhancing culm strength and spikelet number. We produced a pyramiding line carrying SCM3 and SCM2, another QTL encoding APO1 involved in panicle development. The NIL-SCM2+SCM3 showed a much stronger culm than NIL-SCM2 and NIL-SCM3 and an increased spikelet number caused by the additive effect of these QTLs. We discuss the importance of utilizing suitable alleles of these STRONG CULM QTLs without inducing detrimental traits for breeding.

Original languageEnglish
Pages (from-to)303-314
Number of pages12
JournalMolecular Plant
Volume8
Issue number2
DOIs
Publication statusPublished - Feb 2 2015
Externally publishedYes

Keywords

  • Key words culm
  • OsTB1
  • lodging resistance
  • quantitative trait loci
  • strigolactone

ASJC Scopus subject areas

  • Molecular Biology
  • Plant Science

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    Yano, K., Ookawa, T., Aya, K., Ochiai, Y., Hirasawa, T., Ebitani, T., Takarada, T., Yano, M., Yamamoto, T., Fukuoka, S., Wu, J., Ando, T., Ordonio, R. L., Hirano, K., & Matsuoka, M. (2015). Isolation of a novel lodging resistance QTL gene involved in strigolactone signaling and its pyramiding with a QTL gene involved in another mechanism. Molecular Plant, 8(2), 303-314. https://doi.org/10.1016/j.molp.2014.10.009