抗除草剂杂交稻的选育

通过杂交将抗除草剂Liberty的bar基因转移到恢复系 ,培育出 3个抗除草剂恢复系测 6 4 B、明恢 6 3 B和特青 B。与不育系杂交 ,选配出 3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原组合的产量水平 ,苗期喷除草剂可淘汰假杂种。利用这项技术能解决两系、三系或化杀杂交稻在制种过程中出现的纯度问题。

除草剂(草丁膦)抗性基因的遗传与利用

Threerestoringlines (Minghui 6 3,Ce 6 4andTeqing)asfemaleparentswerecrossedwithherbi cide_resistanttransgeniccultivars (Bengal_Hu10andGulfmont)asmaleparents .Geneticanalysisongenera tionsofF1,F2 andBC1indicatedthattheresistancetotheherbicide (Liberty)wascontrolledbyasingledomi nantnucleargene .Theresistancetotheherbicidewillworkasamarkerforthetruehybridfromcrossingwith themaleparent ,butnotforallotherplantsfromeitherselfing ,orintracrossinginfemaleparentpopulation . Aftertheapplicationoftheherbicide ,allplantsexceptthetruehybridwereeliminated .Withtheaidofthis technology ,thestrictrequirementofcompletesterilityformalesterilelineincropscanbereduced .Itwillbe beneficialnotonlyforbreedingnewexcellentmalesterilelines ,butalsoforcommercializingchemicallyin ducedmalesterilesystemincrops .