Quantitative trait loci for rice phyllochron in lemont x IR36 cross

Makoto Morita, Ding Qin Tang, Naoko Miyamoto, Yusuke Goto, Yasuo Ukai, Keisuke Nemoto

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


In rice, genetic variation in "phyllochron" (the time interval between the appearance of successive leaves) affects many aspects of shoot system development. The objective of our study was to identify quantitative trait loci (QTLs) that control phyllochron in a Lemont (japonica) x IR36 (indica) F2 population. Composite interval mapping detected four phyllochron QTLs located on chromosomes 1, 2, 9 and 11. Individually, these QTLs accounted for 8-14% of the phenotypic variation, indicating that phyllochron is controlled by multiple QTLs rather than by a major gene system. At these QTLs, the presence of a Lemont allele increased phyllochron. The only exception was for the QTL on chromosome 9, where the Lemont allele decreased phyllochron. Based on the synteny between rice and maize genomes, the ortholog of the maize terminal ear 1 gene was considered a candidate gene for the QTL on chromosome 1.

Original languageEnglish
Pages (from-to)199-202
Number of pages4
JournalPlant Production Science
Issue number2
Publication statusPublished - 2005 Jun
Externally publishedYes


  • Leaf
  • Phyllochron
  • QTL
  • Rice

ASJC Scopus subject areas

  • Agronomy and Crop Science


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