Advance of New Researches on Tissue Culture of Rare and Endangered Plant Elaeagnus mollis

This review summarized the recent research achievements on the process of tissue culture of the rare and endangered plant Elaeagnus mollis,including sterilizing protocols of different explants derived from adult plants and seeds for tube germination,two types of plants regeneration（organ type and organ genesis type）,methods of rooting and transplanting,factors affecting culture,as well as browning and vitrification phenomena and avoiding measures.And the further biotechnology research fields of E.mollis were prospected.

A new species in the genus Synanthedon(Lepidoptera:Sesiidae)from China

A new species,Synanthedon elaeagnus sp.nov.feeding on Elaeagnus mollis,is described from Shanxi,China.This new species is similar to Synanthedon ulmicola Yang&Wang,1989 in general morphology,but it differs from this latter species by features of the forewing,female and male genitalia.Neighbor-joining and maximum likelihood analysis both recover Synanthedon elaeagnus sp.nov.as a well-supported monophyletic lineage with a high support value based on COI gene sequences.The key features of this new species are illustrated.

人工栽培翅果油树果实表型多样性

研究掌握人工栽培翅果油(Elaeagnus mollis Diels.)群体的表型变异程度、变异规律及群体分类,为开展翅果油树种质资源迁地保存、良种选育利用提供理论依据。通过对人工栽培的户县、乡宁、翼城3个原生种源的翅果油树进行连续试验观测,以各种源的果实和种子为材料,测定和统计果长、种宽等6项性状指标数据,采用巢式设计法,分析其果实表型性状的变异规律和基本模式。3个种源的9项果实表型性状指标平均变异系数为17.79%,变幅为9.82%~33.33%;群体间变异系数乡宁(17.62%)>翼城(16.48%)>户县(14.83%);表型变异在群体间的贡献率占20.52%,群体内贡献占79.48%;表型分化系数从大到小依次为:种长/种宽(36.36%)、果长/果宽(30.76%)、种宽(26.92%)、果长(24.41%)、种长(14.46%)、果宽(4.52%);群体间欧式距离进行UPGMA聚类分析显示,3个群体可分为2类,乡宁和翼城群体归为一类,户县群体单独为一类。人工栽培翅的翅果油树果实表型呈现出丰富的多样性,变异主要来源于群体内贡献;性状指标中以果宽最为稳定;果长与纬度呈极显著的正相关,与年降雨量呈显著的负相关,反映了较明显的地理变异趋势;群体分类上,原生地地理距离上相距较近的种源归为一类,表明果实表型性状受生境地理生态条件影响较大;研究揭示了群体内单株果实性状极大的差异性和独特性,为翅果油树良种的保护、选育和应用提供了有利条件。