Marker Based Estimation of Gene Flow in Tropical Rice Fields and Its Ecological Consequences

Rao, G. J. N.; Swain, D. J.; Mishra, Rukmini; Dokku, Prasad; Krishna, Ram; Rao, Ravi Nageswara; Sahu, Rabindra Kumar

doi:10.1007/s12042-012-9110-0

Cited by 1 publication

(1 citation statement)

References 21 publications

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“…Prediction models of gene flow have been made reflecting various factors, assisted by results obtained from field tests (Walklate et al 2004, Gustafson et al 2005, Yao et al 2008, Rong et al 2010. To support the development of proper guidelines for GM rice confinement, studies on gene flow from GM-rice to wild/weedy rice and to conventional rice cultivars have already been conducted (Messeguer et al 2001, Zhang et al 2003, Messeguer et al 2004, Rong et al 2005, Rong et al 2007, Lu and Yang 2009, Olguin et al 2009, Chun et al 2011, Rao et al 2012, Serrat et al 2013. Outcrossing rate of cultivated rice (Oryza sativa L.) is, however, relatively low in compared to other crops, such as maize or Brassicacea, because its floral structure prefers self-pollination and the distance of gene flow is short because the pollen is heavy and has short life time (Yoshida 1981, Messeguer et al 2001.…”

Section: Field Trialsmentioning

confidence: 99%

Gene flow from herbicide resistant genetically modified rice to conventional rice (Oryza sativa L.) cultivars

Han¹,

Lee²,

Won³

et al. 2015

J. Ecol. Environ.

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Rice (Oryza sativa L.) is an important feeding crop in Asia, and utilization of genetically modified (GM) rice is highly demanding. For co-existence of GM rice and non-GM rice, the proper confinement measures should be provided. Thus, we surveyed gene flow from herbicide resistant GM rice to the conventional rice cultivars in the field tests. Gene flow frequency decreased with increasing distance between the pollen donor and recipients and did not exceed more than 1% even at the nearest distance. In single recipient model plot, a maximum gene flow frequency was observed at the shortest distance and hybrid was detected up to 12 m from the pollen donor. The direction of gene was coincided with the dominant wind direction. Gene flow assessment to multiple recipient plots was conducted under the high raining season by chance, and abrupt decline of gene flow frequency and maximum distance were resulted. According to the survey results, current regulation for isolation distance is reasonable for environmental safety or for general crop production. However, we suggest an alternative measure for GM rice cultivation that should be supplemented to overcome the out of estimation and in the environment asking higher security levels.

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