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银杏无性繁殖位置效应的研究

STUDIES ON TOPOPHYSIS IN ASEXUAL REPRODUCTION OF GINKGO BILOBA L.

  • 摘要: 对银杏无性繁殖的位置效应进行了研究。方差分析结果表明,位置效应在无性繁殖过程中能保持稳定,在品种之间有一定差异。随母树及接穗年龄的增长,位置效应越明显。不同无性繁殖方法有相似的位置效应,并具有显著的重现性。在自然状态下,当年生枝条生长的异质性可分为3个枝段。从嫁接到大量结实后,位置效应可经过强一弱一强阶段。采用基生复干作接穗或插条,或用修剪、复壮和扶梢等方法可以控制或消除位置效应,而且效果明显。

     

    Abstract: The topophysis on asexual reproduction of Ginkgo biloba L. was studied. Theresults of variance analysis show that the topophysis remains stable through asexual reproduction,and possesses distinct difference among various cultivars. The older ages ofmaternal plants and scions are,the more distinct topophysis is. The topophysis is verysimilar through various asexual reproduction methods,and possesses reappearance distinctly. In vivo,the heterogeneity of growth on l-year-old long shoot can be divided Intothree shoot segments. After from cultivars grafted to reproducing a large number ofseeds,the topophysis of long shoot can be divided into strong-weak-strong phases. Wehave found that by the scions and cuttings taken from the hasal multitrunks,or prunning, rejuvenation and straightening up the top of a twig, the topophysis can be con-'trolled or eliminated.

     

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