43个高梁恢复系的株型评价与株高基因效应分析

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关键词：高梁；株高；基因型；分子标记辅助选择中图分类号：S330 文献标识码：A 文章编号：1671-8151（2025）04-0027-10

Abstract：[Objective]Asa globaly important grainand energy crop，sorghum’splantarchitectureoptimization is crucial forenhancingyieldandstresstolerance.Thisstudyaimedtoelucidatethegeneticbasisofplantheighttraitsinparentallines tofacili tatetargetedbreedingofhigh-yielding，stressresistant，andmachine-harvestablesorghumvarieties.[Methods]Inthis study， 43 sorghum restoration lines were evaluatedusing integrated approaches including phenotypiccharacterization，correlationanal ysis，clusteranalysis，andmolecularmarkertechnologytosystematically investigatethegeneticcontrolofplantarchitecture-re latedtraits andtheirbreeding potential.[Results]Plantheightshowed significant positivecorelations withflag leafspacingand panicleneck length，whilenegativelycorelatingwith paniclelength.Phenotypicclusteringanalysis identifiedthreedistinct groups：groupIrepresented ideal plant-type germplasm；Group I required dominant gene introgression forheight mprovement，and group Ill exhibited extreme tall stature （ 174.50cm ）with elongated panicle necks，serving as valuable resources for biomass enhancement. The DWI and DW2 dominant haplotype（DW1DW1DW2DW2） significantly promoted plant height （152.31cm in the double dominant genotypes），while therecessivehomozygous genotype（dwldwldw2dw2）specificaly in creased neck exsertion length （14.00cm ）and panicle neck length （39.89cm ）.[Conclusion]This study demonstrated synergisticeffects of DW1/DW2 dominant alleles on plant height and specific regulation of panicle neck elongation by recessve homo zygotes，providingboth theoretical insightsandpractical germplasmresources forplantarchitecture-oriented breedingpro grams.

Keywords：Sorghum，PlantHeight，Genotype，Molecular Marker-Assisted Selection

高粱［Sorghumbicolor（L.）Moench]作为全球第5大禾谷类作物，广泛分布于热带、亚热带及温带干旱地区，是粮食安全、饲料生产和生物能源开发的重要作物[1。（剩余13501字）