摘要
为了避免或减少由于毛白杨Populustomentosa种植造成的花粉危害,本研究以初选的1601、1602、1603、15号、5号、7号、11号、14号、LE01九份毛白杨雄株优良种质为研究对象,以毛白杨1316为对照,监测了其雄花花序的发育进程,调查了其花序形状及散粉情况,并对各发育时期的花药进行了解剖观察。结果表明:(1)毛白杨雄株花序于2月中旬开始膨大、伸长,3月上中旬,花药开裂并开始散粉,散粉时间为5 d左右;毛白杨雄株花序从花芽膨大、伸出到干枯脱落持续30 d左右。(2)11号、1603、1601、7号种质的花序体积较大;1603、15号、1602、5号以及7号种质花序的散粉鲜质量和干质量较低,其中以1603和15号种质的最低。(3)少粉型毛白杨种质的花药一般在中后期发育迟滞,干瘪,花粉粒粘连,而且花药的开裂率低,导致其无法正常散粉。综上所述,本研究初步筛选出了少粉型毛白杨种质5份,并初步探究了其产粉少的原因,为无花粉或少粉型雄株毛白杨的选育提供理论依据和技术支持。
During 2018 and 2019,9 germplasm of male Populus tomentosa with less pollen were selected from 15 ones in Hebei province.From February to March,observation was carried out on male inflorescence development and morphology,pollen production and anther development.The result showed that male inflorescence began to expand and elongate in mid-February,anthers cracked and pollen disseminated in early or mid-March.The inflorescence development of male poplar lasted for about 30 d.The inflorescence of P.tomentosa’No.11’,P.tomentosa’1603’,P.tomentosa’1601’and P.tomentosa’No.7’was larger in volume.The fresh and dry weight of pollen from P.tomentosa’1603’,P.tomentosa’No.15’,P.tomentosa’1602’,P.tomentosa’No.5’and P.tomentosa’No.7’was lower,especially the first two cultivars.The experiment demonstrated that the anthers of tested P.tomentosa had development retardation in the middle and late stage,pollen grain adhesion and lower anther cracking rate,leading to the failure of normal pollen dissemination.
作者
刘春鹏
张晓华
徐振华
杜克久
李计达
李向军
李新利
LIU Chun-peng;ZHANG Xiao-hua;XU Zhen-hua;DU Ke-jiu;LI Ji-da;LI Xiang-jun;LI Xin-li(Hebei Academy of Forestry and Grassland Sciences,Hebei Technical Innovation Center for Forest Improved Variety,Shijiazhuang 050061,China;Wu’an Forestry Bureau of Hebei,Wu’an 056300,China;College of Forestry,Agriculture University of Hebei,Baoding 071000,China)
出处
《浙江林业科技》
2021年第4期10-14,共5页
Journal of Zhejiang Forestry Science and Technology
基金
河北省省级科技计划资助(21326347D)
河北省财政基本科研经费项目资助(ZXZD2018001)
河北省林业科学技术研究项目资助(1602477)。
关键词
毛白杨
雄株
少粉型
种质筛选
Populus tomentosa
male plant
less pollen
germplasm selection
