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Meiotic restriction in emmer wheat is controlled by one or more nuclear genes that continue to function in derived lines

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Abstract

Highly fertile F1 hybrids were made between Triticum turgidum L. ssp. turgidum (2n = 28, AABB) and Aegilops tauschii Coss. (2n = 14, DD) without embryo rescue and hormone treatment. The F1 plants had an average seed set of 25%. Approximately 96% of the F2 seeds were able to germinate normally and about 67% of the F2 plants were spontaneous amphidiploid (2n = 42, AABBDD). Cytological analysis of male gametogenesis of the F1 plants showed that meiotic restitution is responsible for the high fertility. A mitosis-like meiosis led to meiotic restitution at either of the two meiotic divisions resulting in unreduced gametes. Test crosses of the T. t. turgidum–Ae. tauschii amphidiploid with Ae. variabilis and rye suggested that the mitosis-like meiosis is controlled by one or more nuclear genes that continue to function in derived lines. This discovery indicates a potential application of such genes in producing double haploids.

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Acknowledgments

This work was partially supported by the Chinese Ministry of Education: New Century Excellent Talents in University (NCET-04-0908), the Scientific Research Foundation for the Returned Overseas Chinese Scholars and Changjiang Scholars and Innovative Research Team in University (IRT0453), and by the South Dakota State University Agricultural Experimental Station.

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Authors and Affiliations

  1. Triticeae Research Institute, Sichuan Agricultural University, Dujiangyan City, 611830, Sichuan, China

    Lian-Quan Zhang, You-Liang Zheng & Deng-Cai Liu

  2. Key Laboratory of Crop Genetic Resources and Improvement, Ministry of Education, Sichuan Agricultural University, Yaan, 625014, Sichuan, China

    Lian-Quan Zhang, You-Liang Zheng & Deng-Cai Liu

  3. Biology and Microbiology Department, South Dakota State University, Brookings, SD, 57007, USA

    Yang Yen

Authors
  1. Lian-Quan Zhang
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  2. Yang Yen
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  3. You-Liang Zheng
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  4. Deng-Cai Liu
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Correspondence to Yang Yen or Deng-Cai Liu.

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Communicated by Scott Russell.

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Zhang, LQ., Yen, Y., Zheng, YL. et al. Meiotic restriction in emmer wheat is controlled by one or more nuclear genes that continue to function in derived lines. Sex Plant Reprod 20, 159–166 (2007). https://doi.org/10.1007/s00497-007-0052-x

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  • DOI: https://doi.org/10.1007/s00497-007-0052-x

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