Detection of QTLs for white-back and basal-white grains caused by high temperature during ripening period in japonica rice

Takuya Wada, Katsunori Miyahara, Jun Ya Sonoda, Tadashi Tsukaguchi, Masayuki Miyazaki, Masao Tsubone, Tsuyu Ando, Kaworu Ebana, Toshio Yamamoto, Norio Iwasawa, Takayuki Umemoto, Motohiko Kondo, Masahiro Yano

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

There is increasing evidence that global warming affects the development of rice. High temperatures during ripening increase the ratio of undesirable chalky grains followed by deteriorating grain appearance quality. In order to detect quantitative trait loci (QTLs) controlling the occurrence of white-back and basal-white chalky grains of brown rice, QTL analysis was performed using recombinant inbred lines derived from a cross between two strains, ‘Tsukushiroman’ (sensitive to heat stress) and ‘Chikushi 52’ (tolerant of heat stress). The F7 and F8 lines were exposed to heat stress during the ripening period in two locations, Fukuoka and Kagoshima, in Japan. QTLs for white-back grains and basal-white grains were detected on chromosomes 1, 3, and 8, and those for basal-white grains were detected on chromosomes 2, 3, and 12. QTLs on chromosome 8 for whiteback grains were shared in the plants grown in both locations. Near-isogenic lines (NILs), which harbored a segment from ‘Chikushi 52’ on chromosome 8 with the genetic background of ‘Tsukushiroman’, showed relatively lower ratios of white-back grains than ‘Tsukushiroman’. Therefore, insertion of the ‘Chikushi 52’ genomic region of the QTL on chromosome 8 can improve the quality of rice when it is grown under heat stress conditions.

Original languageEnglish
Pages (from-to)216-225
Number of pages10
JournalBreeding Science
Volume65
Issue number3
DOIs
Publication statusPublished - Jan 1 2015
Externally publishedYes

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Keywords

  • Basal-white grain
  • QTL
  • Rice
  • Tolerance to high temperature
  • White-back grain

ASJC Scopus subject areas

  • Agronomy and Crop Science
  • Genetics
  • Plant Science

Cite this

Wada, T., Miyahara, K., Sonoda, J. Y., Tsukaguchi, T., Miyazaki, M., Tsubone, M., Ando, T., Ebana, K., Yamamoto, T., Iwasawa, N., Umemoto, T., Kondo, M., & Yano, M. (2015). Detection of QTLs for white-back and basal-white grains caused by high temperature during ripening period in japonica rice. Breeding Science, 65(3), 216-225. https://doi.org/10.1270/jsbbs.65.216