广西植物2025，Vol.45Issue(12)：2322-2332,11.DOI:10.11931/guihaia.gxzw202501010
中国特有种湖北黄精开花生物学与繁育系统研究
Flowering biology and breeding system study on Chinese endemic species of Polygonatum zanlanscianense
摘要
Abstract
Polygonatum zanlanscianense is a perennial herbaceous plant with important medicinal value in the genus Polygonatum,the family Asparagaceae.In order to explore flowering biology and breeding system characteristics of P.zanlanscianense,promote hybrid breeding and new variety selection,this paper investigated its flowering biological parameters and pollination system,and carried out artificial pollination experiments.The results were as follows:(1)The single flower of P.zanlanscianense opened around 16:00 in the day and closed around 20:00 the next day,with an opening duration of 28 h.(2)The pollen viability measured by the acetic acid magenta method during the pre-blooming and blooming stages was similar,with 76.34%and 84.02%,respectively.(3)The pollen content of a single flower was 25 460.0±1 309.0,pollen-ovule ratio was 4 243.0±218.0,and outcrossing index(OCI)was 4.(4)The natural pollination setting rate of P.zanlanscianense was 80.55%,the artificial xenogamy setting rate was 72.57%,and the geitonogamy and self-pollination setting rates were 2.98%and 4.68%,respectively.After self-pollination,pollen grains could germinate on the stigma and pass through the style.(5)The main flower-visiting insects were Bombus spp.,Apis cerana,Melanostoma scalare and Aporia largeteaui.From 8:00 to 13:00,insects had the highest frequency of visiting flowers,with a single flower being visited 4 to 5 times.In conclusion,Polygonatum zanlanscianense requires pollinators,and there is no evidence of apomixis.The breeding system type is mainly outcrossing,with a small amount of self-pollination.The research results can provide a theoretical basis for the resource utilization and germplasm innovation of P.zanlanscianense.关键词
湖北黄精/花粉活力/开花动态/杂交指数/繁育系统Key words
Polygonatum zanlanscianense/pollen viability/flowering dynamics/outcrossing index/breeding system分类
农业科技引用本文复制引用
杨冰冰,李华荣,李紫维,何夫..中国特有种湖北黄精开花生物学与繁育系统研究[J].广西植物,2025,45(12):2322-2332,11.基金项目
湖北省中央引导地方发展专项(Z2022387). （Z2022387）
