3个伞房属树种的开花动态及繁育系统研究

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中图分类号：S792.39 文献标志码：A文章编号：1673-923X（2026）03-0056-09

Abstract：【Obective】Corymbiacitriodora，Ctorellaa，andCptychocarparethespecsoforymbiatathavebntrdced toChina formanyyearsandareundergoinggeneticimprovement，butthelackofresearchonthebedingsysteofthisgenusisnot conducivetotesientifcunderstandingandsustaiableutlizationofthisgenus.Theaimofthissdyistocharacterizetefowering andbreedingsystemsofthethreespeciesofCorymbiaandtoprovideabasisforteconservationandimprovementofgeneticresources of Corymbia in China.【Method】 Three species of C citriodora，C.torelliana，and C.ptychocarpa wereanalyzed for their flowering modefowerctuelbilityilioioetdalusgsola usedasacontrolfortecommonlyusedforestationspeciesinChinatostudthediferecesinforaltructureandreproductivesystem among speciesandgenera.【Result】Thethre Corymbiaspeciesdiferedsignificantlyinfoweringpatenandmatingcharacteristics， moreover，apartfromthematingsystemtype，thyalldifersignificantlyfromthecontrolvarieties.AlltreeCorymbiaspeiesare contiuouslyongal;foessotetfroool’stfaalr buds.Therewresiiiantferensinolldameteistilngthovarydaetearylngtdspatialstaeoft fromthestigmaamongthethre speciesofCorymbia;PollenviabilityofthethreespeciesofCorymbiaandthecontrolspecies was highest at the stage of operculum loosening，and was above 80% ；Stigmaacceptabilitywasbasicallyhighest at the stageofoperculum losening，andwasonlyighstattestageoffirstbloominginC.ciriodoraandthestigmaaceptabilityofC.cirdorawaslower thanthoseoftheotherspeciesinallthestagesAcordingtotematingtypecriteria，teOCIvaluesofthethreeCorymbiaspeciesand thecontrolspalllfegaeossyo】o breedingsystemsofthetreeCorymbiaspeciessareommonchaacteristicsthatsignificantlydiferentiatetemfromtheotolll belong toplants thatbloomtwiceayearwithfowersandfruitsappearingsimultaneouslyndwithaelativelylargenumberofbuds inasingleinforesee.butterearedirencesamongtetheespeciesintersoffowermorphologyandstructure，andowering period，however the mating systems ofall three species are heterogamous，as in the control.

Keywords：Corymbia;floweringpattern;flowerstructure;matingcharacteristics; genetic materials

繁育系统是生态学和进化生物学研究的主要内容之一，在物种的遗传多样性、有性生殖和适应性进化过程中起着重要作用[1]，是植物内在遗传机制和外部环境影响相互作用下的生理表达[，对种群维持遗传多样性、表型变异和物种分布具有重要意义[3-5]。（剩余15530字）