求翻译：摘要[目的]为育种选择及性状的早期鉴定提供理论依据。[方法]以杜梨梨树矮化、乔化实生苗为材料，从树高、冠幅、干周、栅栏组织厚度、栅海比、导管密度等指标来比较判断矮化与乔化的不同性状。[结果]杜梨矮化与乔化实生苗在的生长势差异与栅栏组织厚度、栅海比、导管密度之间密切相关，与树高、冠幅、干周之间的关系不明显。[结论]栅栏组织厚度、栅海比以及导管密度可作为杜梨梨树体生长势早期鉴定的指标。是什么意思？

[Objective] provide a theoretical basis for the early identification of breeding selection and traits. [Method] pear Pyrus dwarf, palisade tissue thickness, gate sea ratio, conduit density indicators to compare the judgment of dwarf and Joe, Joe of seedling materials, from tree height, crown width,

[Summary] for breeding purposes and by the early identification theory. [methods] To Do pear pear dwarfing, Joe Miller, for real-time and materials, from tree top high, dry sites, organizations, fencing, gate thickness than sea, conduit, and other indicators to compare density determine dwarfing and

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正在翻译，请等待...