Detection of quantitative trait loci for cold tolerance at the booting stage in a rice breeding line, Hokkai-PL9

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  • Kuroki Makoto
    National Agricultural Research Center for Hokkaido region (NARCH), National Agriculture and Food Research Organization (NARO)
  • Saito Koji
    National Agricultural Research Center for Hokkaido region (NARCH), National Agriculture and Food Research Organization (NARO)
  • Matsuba Shuichi
    National Agricultural Research Center for Hokkaido region (NARCH), National Agriculture and Food Research Organization (NARO)
  • Yokogami Narifumi
    National Agricultural Research Center for Hokkaido region (NARCH), National Agriculture and Food Research Organization (NARO)
  • Ando Tsuyu
    Institute of the Society for Techno-Innovation of Agriculture, Forestry and Fisheries
  • Sato Yutaka
    National Agricultural Research Center for Hokkaido region (NARCH), National Agriculture and Food Research Organization (NARO)
  • Ando Ikuo
    National Institute of Crop Science (NICS), National Agriculture and Food Research Organization (NARO) Present address: Secretariat of Agriculture, Forestry and Fisheries Research Council, Ministry of Agriculture, Forestry and Fisheries of Japan
  • Shimizu Hiroyuki
    National Agricultural Research Center for Hokkaido region (NARCH), National Agriculture and Food Research Organization (NARO)

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Other Title
  • イネ系統「北海ＰＬ９」の穂ばらみ期耐冷性に関するＱＴＬの検出
  • イネ ケイトウ ホッカイ PL9 ノ ホバラミ キ タイレイセイ ニ カンスル QTL ノ ケンシュツ

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Abstract

We performed quantitative trait locus (QTL) analysis for cold tolerance at the booting stage (CT), heading date (HD) and culm length (CL) using 84 recombinant inbred lines derived from a cross combination between temperate japonicas Hokkai-PL9 (cold-tolerant) and Hokkai287 (cold-sensitive). CT was evaluated by fertility after cold water treatment. Three QTLs for CT were detected on chromosomes 1 (qCTB1.1 and qCTB1.2) and 8 (qCTB8.1), and Hokkai-PL9 allele at all three QTLs increased the level of CT. Phenotypic variance explained (PVE) of qCTB1.1, qCTB1.2 and qCTB8.1 were 18.8%, 11.8% and 14.2%, respectively. Three QTLs for HD were detected on chromosomes 2 and 3 (two QTLs), and nine QTLs for CL were detected on chromosomes 1, 2, 3 (three QTLs), 8, 9 (two QTLs) and 11. No QTLs for HD and CL were detected in the same region as QTLs for CT. The effects of the Hokkai-PL9 allele of QTLs for CT significantly increased CT, suggesting that QTL combination is effective for CT improvement.<br>

Journal

  • Breeding Research

    Breeding Research 13 (1), 11-18, 2011

    Japanese Society of Breeding

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