Genetic architecture of leaf photosynthesis in rice revealed by different types of reciprocal mapping populations

Shunsuke Adachi, Toshio Yamamoto, Toru Nakae, Masahiro Yamashita, Masaki Uchida, Ryoji Karimata, Naoto Ichihara, Kazuya Soda, Takayuki Ochiai, Risako Ao, Chikako Otsuka, Ruri Nakano, Toshiyuki Takai, Takashi Ikka, Katsuhiko Kondo, Tadamasa Ueda, Taiichiro Ookawa, Tadashi Hirasawa, Tracy Lawson

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The improvement of leaf net photosynthetic rate (An) is a major challenge in enhancing crop productivity. However, the genetic control of An among natural genetic accessions is still poorly understood. The high-yielding indica cultivar Takanari has the highest An of all rice cultivars, 20-30% higher than that of the high-quality japonica cultivar Koshihikari. By using reciprocal backcross inbred lines and chromosome segment substitution lines derived from a cross between Takanari and Koshihikari, we identified three quantitative trait loci (QTLs) where the Takanari alleles enhanced An in plants with a Koshihikari genetic background and five QTLs where the Koshihikari alleles enhanced An in plants with a Takanari genetic background. Two QTLs were expressed in plants with both backgrounds (type I QTL). The expression of other QTLs depended strongly on genetic background (type II QTL). These beneficial alleles increased stomatal conductance, the initial slope of An versus intercellular CO2 concentration, or An at CO2 saturation. Pyramiding of these alleles consistently increased An. Some alleles positively affected biomass production and grain yield. These alleles associated with photosynthesis and yield can be a valuable tool in rice breeding programs via DNA marker-assisted selection.

Original languageEnglish
Pages (from-to)5131-5144
Number of pages14
JournalJournal of experimental botany
Volume70
Issue number19
DOIs
Publication statusPublished - Oct 15 2019

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Keywords

  • Backcross inbred line
  • chromosome segment substitution line
  • nitrogen content
  • phenology
  • photosynthesis
  • quantitative trait locus
  • reciprocal mapping population
  • rice
  • stomatal conductance
  • yield

ASJC Scopus subject areas

  • Physiology
  • Plant Science

Cite this

Adachi, S., Yamamoto, T., Nakae, T., Yamashita, M., Uchida, M., Karimata, R., Ichihara, N., Soda, K., Ochiai, T., Ao, R., Otsuka, C., Nakano, R., Takai, T., Ikka, T., Kondo, K., Ueda, T., Ookawa, T., Hirasawa, T., & Lawson, T. (2019). Genetic architecture of leaf photosynthesis in rice revealed by different types of reciprocal mapping populations. Journal of experimental botany, 70(19), 5131-5144. https://doi.org/10.1093/jxb/erz303