转bar基因水稻恢复系的生理性状和农艺性状

通过杂交将转bar基因水稻亲本（Gulfmont、Bengal Hu-10和Cypress PB-6）中的bar基因转发转移到恢复系测64、明恢63和特青中，培育出6个抗除草剂（Liberty）的同型恢复系测64－B（G）、测64－B(C)、特青－B（C）、明恢63－B（G）和明恢63－B（C）。抗除草剂同型恢复系的大部分生理性状和主要农艺性状与原恢复系接近。将同型恢复系与不育系杂交，选配出8个抗除草剂三系杂交组合和2个抗除草剂两系杂交组合，抗除草剂组合能保持或略高于原组合的产量水平，利用这项技术有望解决杂交稻制种过程中出现的纯度问题。

Physiological and Agronomic Characters of Restorer Lines of Bar-transgenic Rice

Six Liberty resistant restorer lines Ce 64-B(G)?Ce 64-B(C)?Teqing-B(B)?Teqing-B(C)?Minghui 63-B(G)?Minghui 63-B (C)] have been developed through transferring the herbicide (Liberty) resistant bar gene from bar transgenic rices (Gulfmont, Bengal Hu-10 and Cypress PB-6) to restorer lines (Ce 64, Teqing, Minghui 63) by way of crossing breeding. Most of the physiological and agronomic characters of the homotypic herbicide resistant restorer lines were similar to those of their corresponding original restorer lines. After crossing the homotypic restorer lines with male sterile lines, eight Liberty resistant three line combinations and two Liberty resistant two line combinations were developed and they showed a similar or higher yield level compared with their corresponding original non liberty resistant combinations. The purity problem resulted from hybrid rice seed production could be solved through this technology.