Effects of Dwarfing Genes on Chilling Tolerance at Seedling Stage in Rice

JARQ : Japan Agricultural Research Quarterly
ISSN 00213551
書誌レコードID(総合目録DB) AA0068709X
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The effects of sd1-d, sd1-r and sd1-c at the sd1 locus, d18-k (kotaketamanishiki dwarf) and d12 (yukara dwarf) on the chilling tolerance at the seedling stage were examined. We used isogenic lines regarding the dwarfing genes/alleles, together with their parental varieties ‘Fujiminori’, ‘Shiokari’, ‘Tamanishiki’, ‘Calrose’, Taichung 65, Norin-PL8 and Norin-PL11. Chilling treatments at 2°C for three, four and five days were conducted at the 1- and 2-leaf stages. The chilling tolerances of the lines were evaluated by survival percentages after the treatments. The d12 lowered the chilling tolerance. The sd1-d and sd1-c lowered the chilling tolerance on the less tolerant genetic backgrounds of ‘Fujiminori’ and ‘Shiokari’, whereas this effect did not appear on the more tolerant genetic backgrounds of Taichung 65 and ‘Calrose’. The d18-k enhanced the chilling tolerance on the less tolerant genetic backgrounds of ‘Shiokari’ and ‘Tamanishiki’, whereas the effect did not appear on the more tolerant genetic backgrounds of Norin-PL8 and Norin-PL11. Consequently, d18-k could be utilized to develop varieties adaptable to areas readily damaged by unseasonably low temperatures at all of the susceptible growth stages of rice, because d18-k is known to enhance the cool tolerances at both the booting and flowering stages also.

刊行年月日
作成者 MURAI Masayuki KC Hari Bahadur ISE Kazuo YOSHIDA Tetsushi NISHII Kazushige
著者キーワード

chilling injury

cool weather

direct seeding

Oryza sativa

transplanting

公開者 Japan International Research Center for Agricultural Sciences
オンライン掲載日
国立情報学研究所メタデータ主題語彙集(資源タイプ) Journal Article
40
1
開始ページ 1
終了ページ 12
DOI 10.6090/jarq.40.1
権利 Japan International Research Center for Agricultural Sciences
言語 eng

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