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为评估抗草铵膦转基因水稻明恢86B大规模推广后演化为杂草的生态风险,在农田生态环境下比较了明恢86B、明恢86和杂交稻组合汕优63的生存竞争能力、繁育能力、落粒性、种子生存能力以及对常规除草剂氟吡磺隆的耐药性。结果表明,无论在适宜季节还是非适宜季节,明恢86B和明恢86的生存竞争能力和繁殖力都低于杂交稻组合汕优63,尤其在非适宜期时,汕优63的生存竞争力、繁殖力明显强于明恢86B和明恢86。主要表现在植株较高、分蘖较多以及高产。明恢86B的生存竞争力和繁殖力都略低于明恢86。3个材料的落粒性都不强,且尚未见自生苗产生。在浅埋和深埋处理下,明恢86B种子的生存能力弱于汕优63和明恢86。3个材料对除草剂氟吡磺隆的耐药性无明显差异。表明抗草铵膦转基因水稻86B在中国南京地区环境条件下演化为杂草的可能性较小。
In order to assess the ecological risk of weeds developing after the large-scale popularization of Minghui86B, an anti-glufosinate-transgenic rice, the survival and competition ability of Minghui 86B, Minghui 86 and hybrid rice combination Shanyou 63 were compared in a farmland ecological environment Ability, shattering, seed viability and resistance to conventional herbicide flupsesulfuron. The results showed that the survival competence and fecundity of Minghui86B and Minghui86 were lower than those of Shanyou63, a hybrid rice combination especially in the non-suitable period, both in the suitable season and non-suitable season. , Fertility was significantly stronger than Ming Hui 86B and Ming Hui 86. Mainly in the higher plants, more tillers and high yield. The survival competitiveness and fecundity of Minghui 86B were slightly lower than that of Minghui 86.3 The shattering properties of 86.3 materials were not strong, and no self-emergence seedlings were found. Under the shallow and deep burial treatments, the viability of Minghui 86B was weaker than that of 86.3% of Shanyou 63 and Minghui. There was no significant difference in the resistance to herbicide flupsesulfuron. The results showed that there was less possibility that the transgenic glufosinate-resistant rice 86B evolved into weeds under environmental conditions in Nanjing, China.