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Transgenic restorer rice line Tlc-19 with stacked crylC*/bar genes

Transgenic restorer rice line Tlc-19 with stacked crylC*/bar genes
has low weediness potential without selection pressure

HUANG Yao ,LI Ji.kun ,QIANG Sheng,DAI Wei-min,SONG Xiao-ling

Weed Research Lab Nanjing Agricultural University,Na njIng 210095.P.RChina


Abstract:Stacked(insect and herbicide resistant)transgenic rice T1 c-1 9 with crylC*/bar genes,its receptor rice Minghui 63(herein MH63)and a local two—line hybrid indica rice Fengliangyou Xiang 1(used as a contro1)were compared for agronomic performance under field conditions without the relevant selection pressures.Agronomic traits(plant height,tiller number,and aboveground dry biomass),reproductive ability(pollen viability,panicle length,and filled grain number of main panicles,seed set,and grain yield),and weediness characteristics(seed shattering,seed overwintering ability,and volunteer seedling recruitment)were used to assess the potential weediness without selection pressure of stacked transgene rice T1c-19.In wet direct.seeded and transplanted rice fields.T1c-19 and its receptor MH63 performed similarly regarding vegetative growth and reproductive ability.but both of them were significantly inferior to the contro1.T1c-19 did not display weed characte ristics:it had weak overwintering ability.1ow seed shattering and failed to establish volunteers.Exogenous insect and herbicide resistance genes did not confer competitive advantage to transgenic rice T1c-19 grown in the field without the relevant selection pressures.

Keywords:stacked transgenic rice,T1c-19,agronomic traits,reproductive ability,weediness

原文连接http://www.sciencedirect.com/science/article/pii/S2095311915612199