资源描述：
《半干旱地区菊芋品系植株表型与光合特性分析》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、作物学报ACTAAGRONOMICASINICA2014,40(10):18571864http://zwxb.chinacrops.org/ISSN0496-3490;CODENTSHPA9E-mail:xbzw@chinajournal.net.cnDOI:10.3724/SP.J.1006.2014.01857半干旱地区菊芋品系植株表型与光合特性分析*吕世奇寇一翾杨彬曾军赵长明兰州大学生命科学学院/草地农业生态系统国家重点实验室,甘肃兰州730000摘要:为了加快半干旱地区的新型资源作物菊芋品种的选育进程,有必要探讨菊芋产量及相关性状表型和光
2、合生理基础。选用本课题组收集和培育的4个品系(2个高产,2个低产品系),设置随机区组试验,比较菊芋高产和低产品系与产量形成相关的生物量累积、植株表型和光合特性的差异。结果表明,高产菊芋品系的地上生物量、块茎产量及根生物量显著高于低产品系;高产品系整体表现出明显的生长优势,其株高、基径、叶面积和叶片数均显著高于低产品系。气体交换参数分析表明,高产品系的光补偿点和暗呼吸速率显著小于低产品系,而其他各项参数差异不显著。相关性分析表明,菊芋块茎产量与株高、基径、叶面积、叶片数、地上生物量和根生物量呈显著正相关,而与光补偿点和暗呼吸速率呈显著负相关。建议多的叶
3、片数、大的叶面积和发达的根系作为半干旱地区菊芋高产品系田间选育指标,而低的光补偿点和暗呼吸速率在高产品系选育中也具参考价值。关键词:菊芋品系;表型特征;光合特性;半干旱地区PhenotypicTraitsandPhotosyntheticCharacteristicsofJerusalemArtichoke(HelianthustuberosusL.)intheSemi-aridArea*LÜShi-Qi,KOUYi-Xuan,YANGBin,ZENGJun,andZHAOChang-MingStateKeyLaboratoryofGrassland
4、Agro-Ecosystems/SchoolofLifeSciences,LanzhouUniversity,Lanzhou730000,ChinaAbstract:TospeedupbreedingprocessforJerusalemartichokeinsemi-aridarea,itisnecessarytoinvestigatetraitsrelatedtoyieldandphotosyntheticcharacteristics.Fourstablelinesincludingtwohigh-yieldlinesandtwolow-yie
5、ldlineswerescreenedasmaterials,agronomictraitsandphotosynthesisparametersweredetermined.Theresultsshowedthatthetuberyield,shootbiomassandrootbiomassofJerusalemartichokehigh-yieldlinesweresignificantlyhigherthanthoseoflow-yieldlines,andtheplantheight,stemdiameter,leafarea,leafnu
6、mberofhigh-yieldlineswerealsosignificantlyhigherthanthoseoflow-yieldlines,thencomparedwithlow-yieldlines,thehigh-yieldlinesshowedastrongergrowthvigor.LCPandRdofhigh-yieldlinesweresignifi-cantlylowerthanthoseoflow-yieldlines,butthedifferenceofotherparameterswerenotsignificant.Co
7、rrelationanalysisindi-catedthattuberyieldhadsignificantlypositivecorrelationwithplantheight,stemdiameter,leafarea,leafnumber,shootbiomassandrootbiomass,whilesignificantlynegativecorrelationwithLCPandRd.Hence,insemi-aridareamoreleafnumber,largerleafareaandwell-developedrootsyste
8、mareveryimportantandreliableindicatorsandlowerLCPandRd
