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Molecular and cytological evidences for the natural wheatgrass hybrids occurrence and origin in west China

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Abstract

Interspecies hybridization has been frequently observed in the tribe Triticeae. Natural hybridization between Kengyilia and Roegneria or Elymus species has not been reported as yet. Several sterile wheatgrass individuals exhibiting intermediately morphological traits between Kengyilia and Roegneria or Elymus species were identified in the meadow of Sichuan and Gansu provinces in China, suggesting their natural hybrid origin. The putative hybrids were analyzed by using the sequences of ITS and trnH-psbA together with cytological observation in order to assess the origin of hybrids. Both ITS and cytological data revealed the evidence of allopolyploid origin and confirmed the presence of StStYYP and StStYYHP genomes in the putative natural hybrids. The data suggest that the StStYYP hybrid originated from hybridization between Kengyilia and Roegneria and the hybrid with StStYYHP originated from hybridization between Kengyilia and Elymus. Chloroplast sequence data demonstrated that K. rigidula and K. melanthera were the likely maternal donors in the hybridization events.

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Authors and Affiliations

  1. College of Resources and Environment, Sichuan Agricultural University, Wenjiang, 611130, Chengdu, Sichuan, China

    Jian Zeng

  2. Triticeae Research Institute, Sichuan Agricultural University, Wenjiang, 611130, Chengdu, Sichuan, China

    Xing Fan, Hai-Qin Zhang, Li-Na Sha, Hou-Yang Kang & Yong-Hong Zhou

  3. Key Laboratory of Crop Genetic Resources and Improvement, Ministry of Education, Sichuan Agricultural University, Wenjiang, 611130, Chengdu, Sichuan, China

    Yong-Hong Zhou

  4. College of Biology and Science, Sichuan Agricultural University, Yaan, 625014, Sichuan, China

    Li Zhang, Rui-Wu Yang & Chun-Bang Ding

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  1. Jian Zeng
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  2. Xing Fan
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  3. Hai-Qin Zhang
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  6. Li Zhang
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  9. Yong-Hong Zhou
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Correspondence to Yong-Hong Zhou.

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Zeng, J., Fan, X., Zhang, HQ. et al. Molecular and cytological evidences for the natural wheatgrass hybrids occurrence and origin in west China. Genes Genom 34, 499–507 (2012). https://doi.org/10.1007/s13258-012-0057-1

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  • DOI: https://doi.org/10.1007/s13258-012-0057-1

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