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Genetic Resources and Crop Evolution

, Volume 65, Issue 6, pp 1725–1732 | Cite as

Molecular cytogenetic identification of newly synthetic Triticum kiharae with high resistance to stripe rust

  • Xiaojuan Liu
  • Minghu Zhang
  • Xin Liu
  • Hongyu Li
  • Ming Hao
  • Shunzong Ning
  • Zhongwei Yuan
  • Dengcai Liu
  • Bihua Wu
  • Xuejiao Chen
  • Wenjie Chen
  • Lianquan Zhang
Research Article
  • 144 Downloads

Abstract

Six new amphiploids, Triticum kiharae Dorof. et Migusch. (2n = 6x = 42, AtAtGGDD), are described in this study. They were developed by the chromosome doubling of F1 hybrid crosses between Triticum timopheevii Zhuk. (AtAtGG) with high resistance to stripe rust and Aegilops tauschii Cosson (DD) by colchicine treatment. These amphiploids showed a high level of fertility of 68–80% and exhibited relatively normal chromosome pairing in meiotic metaphase I. Individual chromosomes of T. kiharae could be identified by multicolor fluorescence in situ hybridization using the combination of oligonucleotides probes Oligo-pSc119.2-1, Oligo-pTa535-1, and Oligo-pTa71-2. T. kiharae exhibited high resistance to predominant stripe rust races CYR34, CYR31, CYR32, CYR33, and SY11-4 both during the seedling and adult stages. However, high molecular weight glutenin subunits from Ae. tauschii parents were only partially expressed in the T. kiharae background. These T. kiharae lines provide novel materials to widen the genetic diversity of the common wheat gene pool.

Keywords

Amphiploid FISH Triticum timopheevii Triticum kiharae Aegilops tauschii 

Notes

Acknowledgements

This research was supported by the National Key Research and Development Program (2016YFD0102002), the National Natural Science Foundation of China (31671682, 31671689) and the Open Project of Qinghai Provincial Key Laboratory of Crop Molecular Breeding (2017-ZJ-Y14). We thank Sarah Williams, PhD, from Liwen Bianji, Edanz Group China (www.liwenbianji.cn), for editing the English text of a draft of this manuscript.

Compliance with ethical standards

Conflict of interest

The author declares that he has no conflict of interest.

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Copyright information

© Springer Science+Business Media B.V., part of Springer Nature 2018

Authors and Affiliations

  1. 1.Triticeae Research InstituteSichuan Agricultural UniversityChengduPeople’s Republic of China
  2. 2.Qinghai Provincial Key Laboratory of Crop Molecular Breeding, Northwest Institute of Plateau BiologyChinese Academy of SciencesXiningPeople’s Republic of China

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