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

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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.

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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.

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Authors and Affiliations

  1. Triticeae Research Institute, Sichuan Agricultural University, 211 Huimin Road, Wenjiang, Chengdu, 611130, Sichuan, People’s Republic of China

    Xiaojuan Liu, Minghu Zhang, Xin Liu, Hongyu Li, Ming Hao, Shunzong Ning, Zhongwei Yuan, Dengcai Liu, Bihua Wu, Xuejiao Chen & Lianquan Zhang

  2. Qinghai Provincial Key Laboratory of Crop Molecular Breeding, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, 23 Xinning Lu, Xining, 810001, Qinghai, People’s Republic of China

    Wenjie Chen & Lianquan Zhang

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  1. Xiaojuan Liu
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  2. Minghu Zhang
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  3. Xin Liu
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Correspondence to Wenjie Chen or Lianquan Zhang.

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Liu, X., Zhang, M., Liu, X. et al. Molecular cytogenetic identification of newly synthetic Triticum kiharae with high resistance to stripe rust. Genet Resour Crop Evol 65, 1725–1732 (2018). https://doi.org/10.1007/s10722-018-0649-y

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  • DOI: https://doi.org/10.1007/s10722-018-0649-y

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