The effect of Bt-transgene introgression on plant growth and reproduction in wild Brassica juncea.


:This study aims to investigate the relative plant growth and reproduction of insect-resistant and susceptible plants following the introgression of an insect-resistance Bt-transgene from Brassica napus, oilseed rape, to wild Brassica juncea. The second backcrossed generation (BC2) from a single backcross family was grown in pure and mixed stands of Bt-transgenic and non-transgenic siblings under two insect treatments. Various proportions of Bt-transgenic plants were employed in mixed stands to study the interaction between resistant and susceptible plants. In the pure stands, Bt-transgenic BC2 plants performed better than non-transgenic plants with or without insect treatments. In mixed stands, Bt-transgenic BC2 plants produced fewer seeds than their non-Bt counterparts at low proportions of Bt-transgenic BC2 plants in the absence of insects. Reproductive allocation of non-transgenic plants marginally increased with increasing proportions of Bt-transgenic plants under herbivore pressure, which resulted in increased total biomass and seed production per stand. The results showed that the growth of non-transgenic plants was protected by Bt-transgenic plants under herbivore pressure. The Bt-transgene might not be advantageous in mixed stands of backcrossed hybrids; thus transgene introgression would not be facilitated when herbivorous insects are not present. However, a relatively large initial population of Bt-transgenic plants might result in transgene persistence when target herbivores are present.


Transgenic Res


Transgenic research


Liu YB,Darmency H,Stewart CN Jr,Wei W,Tang ZX,Ma KP




Has Abstract


2015-06-01 00:00:00












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    authors: Paul E,Kielbasinski M,Sedivy JM,Murga-Zamalloa C,Khanna H,Klysik JE

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    authors: Lamotte L,Jackerott M,Bucchini D,Jami J,Joshi RL,Deltour L

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    authors: Huang W,Olsen BR

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    journal_title:Transgenic research

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    authors: Olson LE,Tien J,South S,Reeves RH

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    pub_type: 杂志文章


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    pub_type: 杂志文章


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    journal_title:Transgenic research

    pub_type: 杂志文章


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    journal_title:Transgenic research

    pub_type: 杂志文章


    authors: Cruz BP,Brongar LF,Popiolek P,Gonçalvez BSB,Figueiredo MA,Amaral IPG,Da Rosa VS,Nery LEM,Marins LF

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    pub_type: 杂志文章


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