2001
DOI: 10.1007/s001220100713
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Field assessments of gene flow from transgenic to cultivated rice (Oryza sativa L.) using a herbicide resistance gene as tracer marker

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Cited by 120 publications
(119 citation statements)
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“…Field trail of transgenic plant raises concerns of environmental safety, because rice is a staple food worldwide. Recently, rice was listed as a favorable host for molecular farming (38) for the following reasons: first, rice is a highly self-pollinated crop, and rice pollen is remarkably short-lived (<10 min) when it is out of the anther (39); with regard to biosafety assessment of transgenic rice it showed a very low frequency (0.04-0.80%) of pollen-mediated gene flow between genetically modified (GM) rice and adjacent non-GM plants (40,41). This low frequency can be decreased to negligible levels by a short spatial isolation (42).…”
Section: Discussionmentioning
confidence: 99%
“…Field trail of transgenic plant raises concerns of environmental safety, because rice is a staple food worldwide. Recently, rice was listed as a favorable host for molecular farming (38) for the following reasons: first, rice is a highly self-pollinated crop, and rice pollen is remarkably short-lived (<10 min) when it is out of the anther (39); with regard to biosafety assessment of transgenic rice it showed a very low frequency (0.04-0.80%) of pollen-mediated gene flow between genetically modified (GM) rice and adjacent non-GM plants (40,41). This low frequency can be decreased to negligible levels by a short spatial isolation (42).…”
Section: Discussionmentioning
confidence: 99%
“…These variants were more japonica-like in the MSPs and more indica-like in the SSPs. It was known that more japonica than indica rice was planted from north to south in China, and that gene flow may occur, especially from cultivated rice to CWR when the cultivated rice was planted near the CWR population (Messeguer et al, 2001;Song et al, 2003b). Was the indica-japonica divergence within CWR a result of gene flow from cultivated rice to CWR?…”
Section: Discussionmentioning
confidence: 99%
“…Thus, the possibility that japonica rice transferred genes to CWR is very slim. In addition, most of the research reported that the pollen of cultivated rice could be transferred only 30-40 m (Messeguer et al, 2001;Song et al, 2003b), and most of the individuals were sampled from a point at least 50 m away from the population edge. So, we deduced that indica-like and japonica-like divergence was caused mainly by natural adaptation to different climatic regions rather than the influence of gene flow from cultivated rice.…”
Section: Discussionmentioning
confidence: 99%
“…Apesar de o arroz ser uma planta autógama, a literatura menciona a ocorrência de fecundação cruzada, ao redor de 1% (Jodon, 1959), variando em função do ambiente e dos genótipos envolvidos (Jachuck & Sampath, 1966), tendo sido relatadas taxas de cruzamento superiores a 50% (Langevin et al, 1990). Trabalhos recentes, desenvolvidos com o objetivo de avaliar o fluxo gênico entre o arroz transgênico e o arroz comercial não-transgênico, mostraram que ocorre fluxo gênico entre o arroz-vermelho e o arroz transgênico quando cultivados lado a lado ou em distâncias curtas (Sanders et al, 1998;Messeguer et al, 2001;Noldin et al, 2002b). Sob condições de plena sincronia na floração entre a planta daninha e o arroz GM e considerando este arroz como doador ou receptor de pólen, os autores reportaram taxas de cruzamento que variaram de 0,02 a 0,26% (Noldin et al, 2002b).…”
Section: Introductionunclassified
“…Sob condições de plena sincronia na floração entre a planta daninha e o arroz GM e considerando este arroz como doador ou receptor de pólen, os autores reportaram taxas de cruzamento que variaram de 0,02 a 0,26% (Noldin et al, 2002b). Messeguer et al (2001) detectaram taxas de fluxo gênico entre o arroz transgênico e o não-transgênico levemente inferiores a 0,1% em parcelas localizadas lado a lado. Assim, qualquer gene alienígena introduzido em cultivares comerciais de arroz poderá em curto espaço de tempo ser incorporado ao complexo de arrozvermelho infestante das lavouras comerciais, através do fluxo de pólen dos cultivares geneticamente modificados (Olofsdotter et al, 2000).…”
Section: Introductionunclassified