资源描述：
《60co-γ辐照对直立型扁蓿豆生长发育特性影响》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、摘要60利用不同剂量（600Gy、800Gy、1000Gy、1200Gy、1400Gy）Co-γ射线辐照直立型扁蓿豆（Medicagoruthenica）干种子和吸胀种子，对其M0代生长第3年的植株和M1代幼苗的生长发育特性进行诱变效应分析，为获得高产优质的直立型扁蓿豆新材料提供理论依据。主要研究结果如下：1.干种子辐射后，M0代植株在1400Gy下株型100%为斜生型；在1000Gy条件下荚果大、叶片小、多叶、叶绿素含量较高、生长快（1.26cm/d）；在800Gy辐射条件下，具有多叶、叶面积大等优良特性。2.吸胀种子辐射后，M0代植株在1000Gy下80%为直立型，且花小
2、、荚果大、种子宽、多叶、叶绿素含量较高、生长快（1.31cm/d）；在1200Gy辐射条件下，表现出荚果宽、种子大、多叶等优良特性。3.干种子和吸胀种子辐射后，M0代植株在600Gy下完熟期百粒重最高，而单株生殖枝数显著低于对照。干种子在600Gy、吸胀种子在800Gy下单株种子产量较高。4.干种子辐照后M1代出苗率增加、硬实率降低，而吸胀种子辐射后M1代硬实率增加、出苗率有所降低；幼苗叶片长出的速度均比对照快；第一片真叶变异率较高；幼苗早期生长速度较对照快，后期生长速度较对照降低。60关键词：Co-γ；直立型扁蓿豆；种子产量；形态变异；生长发育60TheEffectofCo
3、-γRaysonCharacteristicsofGrowthandDevelopmentofMedicagoruthenicaAbstractDryseedsandimbibedseedsofMedicagoruthenicaweretreatedwithdifferentdoses(600Gy、800Gy、601000Gy、1200Gy、1400Gy)ofCo-γradiation,andanalysismutageniceffectonthegrowthcharacteristicsofM0generationandM1generationseedlingsinthir
4、dyears,astoprovideatheoreticalbasisforverticalhighyieldandqualityofMedicagoruthenicanewmaterial.Themainresultswereasfollows:1.M0generationplantsofdryseedsafterradiationshowed100%obliquetypein1400Gy;largepods,smallleaves,leafy,highchlorophyllcontent,highergrowthspeed(1.26cm/d)in1000Gy;andlea
5、fy,largeleafareaandotherexcellentcharacteristicsin800Gy.2.M0generationplantsofimbibedseedsafterradiationshowed80%upright,smallflowers,largepods,wideseed,leafy,highchlorophyllcontent,highergrowthspeed(1.31cm/d)in1000Gy;andwidepod,largeseeds,leafyandotherexcellentcharacteristicsin1200Gy.3.Wei
6、ghtof100grainswasthehighestinwasthematurestage,andreproductivebranchnumberperplantwassignificantlylowerthanthatofcontrolin600Gy.Seedyieldperplantwashigherin600Gyofdryseedsandin800Gyofimbibedseeds.4.GerminationrateincreasedandhardseedratedecreasedinM1seedsofdryseeds,germinationratedecreaseda
7、ndhardrateincreasedinM1seedsofimbibedseeds;leavesoftheseedlingsgrowedfasterthanthecontrolgroup;andthefirsttrueleafmutationratewashigher;thegrowthrateofseedlingswasfasterthanthecontrolgroupearly,anddecreasedinlaterstage.60Keywords:Co-γ；Medicagoruthenica；S
