Genetic Resources and Crop Evolution

, Volume 59, Issue 3, pp 399–410

Genetic diversity and origin of Japonica- and Indica-like rice biotypes of weedy rice in the Guangdong and Liaoning provinces of China


  • Lianju Zhang
    • Weed Research LaboratoryNanjing Agricultural University
  • Weimin Dai
    • Weed Research LaboratoryNanjing Agricultural University
  • Chuan Wu
    • Weed Research LaboratoryNanjing Agricultural University
  • Xiaoling Song
    • Weed Research LaboratoryNanjing Agricultural University
    • Weed Research LaboratoryNanjing Agricultural University
Research Article

DOI: 10.1007/s10722-011-9690-9

Cite this article as:
Zhang, L., Dai, W., Wu, C. et al. Genet Resour Crop Evol (2012) 59: 399. doi:10.1007/s10722-011-9690-9


Weedy rice has been becoming a notorious weed in the paddy field of China in recent decades due to its increasing damage to rice yield and rice quality. In this study, a microsatellite technique with 21 pairs of SSR markers was utilized to estimate the genetic structure of two biotypes of weedy rice with Japonica and Indica rice characteristics, collected from Liaoning and Guangdong provinces, respectively. The genetic diversity of the weedy rice in the two provinces was relatively low (Liaoning h = 0.086; Guangdong h = 0.160), and distinctly large genetic differences existed between these two provinces (Gcs = 0.623). The genetic diversity was found primarily within populations, and genetic differentiation was relatively low within the same province. Both cluster analysis (UPGMA) and principle component analysis (PCA) showed that weedy rice had a closer relationship with the cultivated rice collected from the sample field than with other cultivated rice and common wild rice varieties in China. Thus, the results of this study on samples from the Liaoning and Guangdong provinces in China support the de-domestication hypothesis that weedy rice most probably originated from local cultivated rice.


De-domesticationGenetic diversityOryza rufipogonO. sativaSimple sequence repeat (SSR)Weedy riceWeedy rice origin

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© Springer Science+Business Media B.V. 2011