Allelic variation and geographic distribution of vernalization genes HvVRN1 and HvVRN2 in Chinese barley germplasm

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• 作者：Dawa Dondup ; Guoqing Dong ; Dongdong Xu ; Lisha Zhang ; Sang Zha…
• 关键词：Barley genetic resources ; Genotyping ; Haplotype
• 刊名：Molecular Breeding
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：36
• 期：1
• 全文大小：1,085 KB
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• 作者单位：Dawa Dondup (1) (2)
  Guoqing Dong (3)
  Dongdong Xu (1)
  Lisha Zhang (1) (3)
  Sang Zha (1)
  Xingmiao Yuan (1)
  Nyima Tashi (2)
  Jing Zhang (1)
  Ganggang Guo (1)
  
  1. Key Laboratory of Crop Germplasm Resources and Utilization (MOA), The National Key Facility for Crop Gene Resources and Genetic Improvement, Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
  2. Tibet Academy of Agricultural and Animal Sciences, Lhasa, 850032, Tibet, China
  3. School of Biology and Pharmaceutical Engineering, Wuhan Polytechnic University, Wuhan, 430023, China
  
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Life Sciences
  Plant Sciences
  
• 出版者：Springer Netherlands
• ISSN：1572-9788

文摘

Knowledge of the allelic variation and epistatic interaction of vernalization genes is crucial to understanding seasonal growth habit and adaptability of genetic resources in cultivated (Hordeum vulgare) and wild (Hodeum spontaneum) barley. In this research, 1398 Chinese barley accessions were characterized with molecular markers for vernalization genes HvVRN1 and HvVRN2. Different combinations of haplotypes at these two vernalization genes were present at different frequencies in wild barley, landraces and modern cultivars. All of the HvVRN1 haplotypes except HvVRN1-7 (V _1-7 ) and HvVRN1-Hs (V _1-Hs ) were identified in the Chinese barley collection chosen for this study. Haplotype V _1-8 occurred at the highest frequency in spring V ₁ alleles, and V _1-1 , V _1-4 and V _1-8 had broad geographic distributions in China. Haplotypes V _1-2 and V _1-3 are restricted to modern cultivars as they were introduced from exotic germplasm. A total of 18 HvVRN1/HvVRN2 multilocus haplotypes were identified. Most of the HvVRN1/HvVRN2 haplotypes were present in materials from the Yellow-Huai River Valley and Middle-Lower Yangtze Valley ecological zones, birthplace of Chinese farming. The predominant combinations in landraces were V _1-8 /V ₂ and v ₁ /V ₂ , but v ₁ /v ₂ made up the highest proportion of modern cultivars. Haplotypes V _1-5 /v ₂ , V _1-10 /V ₂ and V _1-9 /V ₂ showed a correlation with region. Our results confirmed the presence or absence of conserved regulatory elements and the length of the first intron of HvVRN1 plays a determinant role in the vernalization requirement of barley. This study provides useful information for breeding and utilization of Chinese barley germplasm.