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Chinese Science Bulletin

, Volume 50, Issue 15, pp 1605–1612 | Cite as

Assessment on alien herbicide-resistant gene flow among crucifers by sexual compatibility

  • Zhao Xiangxiang
  • Lu Weiping
  • Qi Cunkou
  • Pu Huiming
  • Xia Qiuxia
  • Lu Dalei
  • Liu Geshan
  • Wang Youping
Articles

Abstract

Cross-pollination and high cross-compatibility are frequently found in many cruciferous plants, which implies that there might be potential risk of alien gene flow among crucifers. In this work, the alien glyphosate-resistant gene flow between GM (Genetically modified) rapeseed variety Q3 (Brassica napus) and 6 varieties from 5 cruciferous species was assessed by sexual compatibility through aniline blue fluorescence observation, manual cross, mentor pollination with the mixture pollen and DNA identification. The results indicated that the compatibility indices of two B. napus varieties, B. juncea var. multiceps Tsen et Lee and Chinese cabbage (B. chinensis) (as female) with Q3 (as male) were 16.15, 12.77, 2.345 and 0.85, respectively. F1 plants were examined by PCR and all of these samples were confirmed as positive. Crossing between Orychophragmus violaceus, Descurainia sophia (as female) and Q3 (as male) expressed high cross-incompatibility. Fluorescence microscope observation indicated that growing of pollen tube terminated at the upper 1/3 part of the style of O. violaceus and on the stigma surface of D. sophia. The mentor plants were further analyzed by PCR and all were shown to be negative. Under the neighboring growth and natural pollination conditions, the rates of gene flow to two B. napus varieties were 2.3278% and 2.1487%, respectively, B. juncea var multiceps Tsen et Lee and Chinese cabbage were 1.0157% and 0.9236%, respectively. No gene flow was observed in O. violaceus and D. sophia. Frequency of gene flow was highly correlated with sexual compatibility. Due to possible alien gene flow among crucifers, special consideration and care should be taken to grow GM rapeseed.

Keywords

herbicide-resistant GM rapeseed cruciferous plants aniline blue fluorescence mentor method sexual compatibility geneflow 

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Copyright information

© Science in China Press 2005

Authors and Affiliations

  • Zhao Xiangxiang
    • 1
  • Lu Weiping
    • 1
  • Qi Cunkou
    • 2
  • Pu Huiming
    • 2
  • Xia Qiuxia
    • 1
  • Lu Dalei
    • 1
  • Liu Geshan
    • 2
  • Wang Youping
    • 3
  1. 1.Jiangsu Provincial Key Lab of Crop Genetics and PhysiologyYangzhou UniversityYangzhouChina
  2. 2.Institute of Industrial CropsJiangsu Academy of Agricultural SciencesNanjingChina
  3. 3.College of Bioscience and BiotechnologyYangzhou UniversityYangzhouChina

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