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刘春鹏 , 张晓华, 徐振华, 杜克久, 李计达, 李向军, 李新利. 毛白杨雄花发育特征及少粉型种质选择与成因分析[J]. 浙江林业科技, 2021, 41(4): 10-14. DOI: 10.3969/j.issn.1001-3776.2021.04.002
引用本文: 刘春鹏 , 张晓华, 徐振华, 杜克久, 李计达, 李向军, 李新利. 毛白杨雄花发育特征及少粉型种质选择与成因分析[J]. 浙江林业科技, 2021, 41(4): 10-14. DOI: 10.3969/j.issn.1001-3776.2021.04.002
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LIU Chun-peng, ZHANG Xiao-hua, XU Zhen-hua, DU Ke-jiu, LI Ji-da, LI Xiang-jun, LI Xin-li. Characteristic of Inflorescence Development and Selection of Less Pollen of Male Populus tomentosa[J]. Journal of Zhejiang Forestry Science and Technology, 2021, 41(4): 10-14. DOI: 10.3969/j.issn.1001-3776.2021.04.002
Citation: LIU Chun-peng, ZHANG Xiao-hua, XU Zhen-hua, DU Ke-jiu, LI Ji-da, LI Xiang-jun, LI Xin-li. Characteristic of Inflorescence Development and Selection of Less Pollen of Male Populus tomentosa[J]. Journal of Zhejiang Forestry Science and Technology, 2021, 41(4): 10-14. DOI: 10.3969/j.issn.1001-3776.2021.04.002
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毛白杨雄花发育特征及少粉型种质选择与成因分析

Characteristic of Inflorescence Development and Selection of Less Pollen of Male Populus tomentosa

    摘要
  • 摘要: 为了避免或减少由于毛白杨Populus tomentosa 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。

     

    Abstract: 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 30d. 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.

     

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