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Genetic diversity in Chinese and exotic Brassica rapa L. accessions revealed by SSR and SRAP markers

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Abstract

The genetic diversity and relationship was studied in a collection of 65 Brassica accessions, which included 54 B. rapa and 11 of five other Brassica species used as references. These 54 B. rapa accessions included 42 Chinese accessions and 12 exotic accessions. All accessions were analyzed by using 36 simple sequence repeats (SSR) and 43 sequence-related amplified polymorphism (SRAP) primers, and 401 polymorphic fragments were detected by SSR and SRAP markers. The average number of polymorphic fragments detected by SRAP markers was 6.23 ranging from 2 to 11 and that revealed by SSR was 3.69 ranging from 2 to 7. The unweighted pair-group method with arithmetic mean cluster analysis indicated that all accessions could be divided into five major clusters except three accessions as outliers. The exotic B. rapa accessions appeared in Cluster I except one yellow sarson accession from India, Chinese B. rapa revealed in Cluster II, and 11 accessions of other Brassica expressed them Cluster III, Cluster IV, and Cluster V. The results of principal component analysis and population structure analysis were in accordance with the cluster analysis. Molecular variance analysis revealed that the genetic variation was 26.10% among populations and 73.90% within Brassica species, which indicated existence of considerable genetic variation among exotic and Chinese B. rapa species, and exotic B. rapa can be used for broadening the genetic background of Chinese B. napus, and vice versa.

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Acknowledgements

This work was supported by the earmarked fund for China Agriculture Research System (CARS-13), National Key Technology R&D Program (2010BAD01B02), and a grant of Northwest A&F University for S.W. Hu.

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Authors and Affiliations

  1. College of Agronomy, Northwest A&F University, Yangling, 712100, Shaanxi, People’s Republic of China

    **aojuan Zhang, Haiyan Chen, Siraj Ahmed Channa, Yunxiao Zhang, Yuan Guo & Shengwu Hu

  2. College of Life Sciences, Northwest A&F University, Yangling, 712100, Shaanxi, People’s Republic of China

    **aojuan Zhang & Fei Yu

  3. College of Animal Science and Technology, Northwest A&F University, Yangling, 712100, Shaanxi, People’s Republic of China

    Haiyan Chen

  4. School of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723001, Shaanxi, People’s Republic of China

    **aojuan Zhang

  5. Department of Plant Breeding and Genetics, Sindh Agriculture University, Tandojam, 70060, Sindh, Pakistan

    Siraj Ahmed Channa

  6. Crop Research Institute, Drnovska 507, 161 06, Prague 6, Czech Republic

    Miroslav Klima

Authors
  1. **aojuan Zhang
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  2. Haiyan Chen
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  4. Yunxiao Zhang
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  6. Miroslav Klima
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  7. Fei Yu
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Corresponding authors

Correspondence to Fei Yu or Shengwu Hu.

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Table S1

Information of 43 pairs of SRAP primers (DOCX 23 kb)

Table S2

Information of 36 pairs of SSR primers (DOCX 21 kb)

Table S3

Scoring of a representative gel of SSR with primer BrGMS126 and accession no. in Table S3 correspond to Table 1 (XLS 547 kb)

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Zhang, X., Chen, H., Channa, S.A. et al. Genetic diversity in Chinese and exotic Brassica rapa L. accessions revealed by SSR and SRAP markers. Braz. J. Bot 40, 973–982 (2017). https://doi.org/10.1007/s40415-017-0392-1

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  • DOI: https://doi.org/10.1007/s40415-017-0392-1

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