Detection of QTL for pre-harvest sprouting resistance and grain dormancy in highly sprouting-tolerant wheat

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  • Nishimura Tsutomu
    Kamikawa Agricultural Experiment Station, Hokkaido Research Organization The United Graduate School of Agricultural Sciences, Iwate University Present address: Central Agricultural Experiment Station Iwamizawa Branch, Hokkaido Research Organization
  • Mori Masahiko
    The United Graduate School of Agricultural Sciences, Iwate University Department of Agro-Environmental Science, Obihiro University of Agriculture and Veterinary Medicine
  • Kamada Takahiro
    Department of Agro-Environmental Science, Obihiro University of Agriculture and Veterinary Medicine
  • Nakane Wakana
    Department of Agro-Environmental Science, Obihiro University of Agriculture and Veterinary Medicine
  • Komine Ikkei
    Department of Agro-Environmental Science, Obihiro University of Agriculture and Veterinary Medicine
  • Onishi Kazumitsu
    Department of Agro-Environmental Science, Obihiro University of Agriculture and Veterinary Medicine
  • Torada Atsushi
    HOKUREN Agricultural Research Institute
  • Jinno Hironobu
    Kitami Agricultural Experiment Station, Hokkaido Research Organization
  • Miura Hideho
    The United Graduate School of Agricultural Sciences, Iwate University Department of Agro-Environmental Science, Obihiro University of Agriculture and Veterinary Medicine

Bibliographic Information

Other Title
  • 穂発芽性極難コムギのもつ穂発芽耐性QTLと種子休眠性QTLの検出
  • ホ ハツガセイキョクナン コムギ ノ モツ ホ ハツガ タイセイ QTL ト シュシ キュウミンセイ QTL ノ ケンシュツ

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Abstract

<p>To identify quantitative trait loci (QTL) that confer excellent resistance to pre-harvest sprouting (PHS) in wheat, levels of sprouting in matured spikes and grain dormancy were investigated in a population of doubled haploid lines derived from a cross between the breeding line “Kitakei 1802” (highly tolerant to PHS) and the local leading variety “Kitahonami”. The doubled haploid population and parental genotypes were grown in six different environments. As sprouting resistance and grain dormancy were gradually lost after maturity, spikes were collected 10 days after physiological maturity. Assessment for PHS resistance was based on a sprouting assay conducted during 7–10 days artificial rain treatment on intact spikes, whereas grain dormancy was evaluated in germination tests at 15°C. Four QTL in total were detected in the sprouting assay. A QTL on chromosome 2D, designated as QPhs-2D, was found to be a stable QTL with a large effect across all six environments. The effect of the MOTHER OF FT AND TFL1 (MFT-3A) gene was detected in three environments. The remaining two QTL with minor effects were identified on chromosomes 1A and 7B in single environments. The resistant alleles at these QTL were all derived from “Kitakei 1802”. The effect of MFT-3A on grain dormancy was evident whereas the effect of QPhs-2D was unclear. These results demonstrated that incorporating QPhs-2D for sprouting tolerance along with MFT-3A for grain dormancy could markedly contribute to excellent PHS resistance.</p>

Journal

  • Breeding Research

    Breeding Research 21 (2), 115-123, 2019-12-01

    Japanese Society of Breeding

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