High risk of the formation of milky white rice kernels in cultivars with higher potential grain growth rate under elevated temperatures

Toru Kobata, Norihiko Miya, Nguyen Thi Anh

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Our objective was to clarify whether rice cultivars with a higher grain dry-matter increase rate (GIR) under elevated temperature condition show a higher percentage of milky white rice kernels (MWK). The rate of MWK judged using a rice-quality selector signifi cantly varied with the cultivar and experimental year. The spikes of the cultivars detached 5-7 days after heading were solution-cultured with an adequate nutrient supply for one week at 25, 28 and 33°C. GIR was overall the highest at 28°C, and GIR at this temperature was considered to refl ect the potential GIR in all the grains tested. There was a close correlation between the rate of MWK and the GIR at 28°C under fi eld conditions when temperatures during the grain-fi lling period were approximately over 25°C. It was suggested that cultivars with a higher potential GIR under elevated temperature conditions have a higher risk of the formation of MWK.

Original languageEnglish
Pages (from-to)359-364
Number of pages6
JournalPlant Production Science
Volume14
Issue number4
DOIs
Publication statusPublished - Sep 30 2011
Externally publishedYes

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rice
cultivars
seeds
temperature
heading
inflorescences
nutrients

Keywords

  • Cultivar
  • High temperature
  • Milky white rice kernel
  • Rice
  • Solution culture

ASJC Scopus subject areas

  • Agronomy and Crop Science

Cite this

High risk of the formation of milky white rice kernels in cultivars with higher potential grain growth rate under elevated temperatures. / Kobata, Toru; Miya, Norihiko; Anh, Nguyen Thi.

In: Plant Production Science, Vol. 14, No. 4, 30.09.2011, p. 359-364.

Research output: Contribution to journalArticle

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