不同家系火力楠种子性状变异及外源赤霉素对种子萌发的影响  

Effects of Gibberellin on Seed Germination and Seed Character Variation of Michelia macclurei from Different Families

作　　者：粟莉圆 苏丽华 覃建彬 梁馨元 李建凡 梁机[1] SU Liyuan;SU Lihua;QIN Jianbin;LIANG Xinyuan;LI Jianfan;LIANG Ji(Forestry College of Guangxi University,Nanning 530004,China;Xiangzhou Forestry Farm of Guangxi,Laibin Guangxi 546100,China;Yulin Research Institute of Forestry,Yulin Guangxi 537000,China)

机构地区：[1]广西大学林学院,南宁530004 [2]广西象州县林场,广西来宾546100 [3]广西玉林市林科所,广西玉林537000

出　　处：《种子》2020年第7期49-52,59,共5页Seed

基　　金：广西“十一五”林业科技项目(桂林科字2009-2-3);玉林市林科所火力楠、大花序桉国家重点林木良种基地建设项目(林场发[2017]93号)。

摘　　要：以广西玉林市林科所5个家系火力楠种子为材料,对种子性状变异进行研究,使用不同浓度外源赤霉素处理后进行发芽试验。结果表明,1)火力楠家系间种子性状存在显著差异,种厚变异系数最大达18.90%,各性状平均变异系数为3.51%,42号家系种子长、宽、厚和千粒重最大,24号最小;2)不同赤霉素浓度处理下各家系种子发芽率有显著差异,100 mg·L^-1赤霉素浓度处理下火力楠各家系种子发芽率最高,42号种子发芽率高达88.3%;1200 mg·L^-1赤霉素浓度处理下各家系种子发芽率最低,24号种子发芽率仅为4.7%;3)统计赤霉素处理后的火力楠种子发芽后形成的幼苗生物量发现,经100 mg·L^-1赤霉素处理的火力楠种子幼苗生物量与对照相比有所提高。In this paper,the seed variation of 5 Michelia macclurei families from the Institute of Forestry in Yulin city of Guangxi province was studied.The results showed that 1)There were significant differences in seed traits among the families of M.macclurei,with the maximum variation coefficient of seed thickness reaching 18.90%and the average variation coefficient of each trait being 3.51%.The seed length,width,thickness and 1000-seed weight of the family No.42 were the largest,while that of the family No.24 was the smallest;2)The germination rate of seeds of different families was significantly different under different concentrations of gibberellin,and the germination rate of seeds of No.42 was as high as 88.3%under 100 mg·L^-1 of gibberellin.The seed germination rate was the lowest in each line under the treatment of 1200 mg·L^-1 gibberellin concentration,and the germination rate of No.24 was only 4.7%;3)The statistical results of the biomass of seedlings formed after germination of M.macclurei seeds showed that the biomass of seedlings of M.macclurei seeds treated with 100 mg·L^-1 gibberellin was increased compared with the control group.

关 键 词：火力楠 赤霉素 发芽率 

分 类 号：S792.99[农业科学—林木遗传育种]