Roxb., belongs to the family Simaroubaceae, is a fast-growing multipurpose tree, and used mainly as a source of fodder and shade. It bears male, female, and hermaphrodite flowers on separate plants. It has been observed that male plant has more leaf biomass during April-May in semi-arid regions of India (Jaipur). In its vegetative state, the sex of the tree cannot be identified. The present study has therefore been designed to investigate if there is any difference in male and female plants based on morphological descriptors namely stomata number, stomata length, stomata diameter, trichome number, trichome length, and trichome diameter. 20 plants with male flowers and 20 plants with female flowers have been studied. The data revealed that male plants have lower trichome diameter (11.91 µm) than female (14.18 µm) plants. Other parameters do not show any statistically significant difference ( > 0.05). The Omnibus Tests of the Model Coefficient obtained for trichome diameter (0.042) is reliable in improving the model, implying that the model is the best fit. To test the validity of this model, the Hosmer and Lemeshow test was performed, and the of chi-square (0.405 > 0.05) indicates that the logistic model obtained above is the best-fit model. Further studies of trichome diameter at the seedling stage and then confirmation of plant sex at maturity level will help in establishing morphological markers in for identification of sex.

中文翻译：

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建立区分臭椿雄性和雌性植物的形态标记。使用多元逻辑回归

Roxb.属于苦木科，是一种快速生长的多用途乔木，主要用作饲料和遮荫来源。它在不同的植物上开出雄性、雌性和雌雄同体的花。据观察，在印度半干旱地区（斋浦尔），雄性植物在四月至五月期间叶片生物量较多。在植物状态下，无法识别树的性别。因此，本研究旨在根据形态描述符（即气孔数量、气孔长度、气孔直径、毛状体数量、毛状体长度和毛状体直径）调查雄性和雌性植物是否存在差异。已研究了 20 种具有雄花的植物和 20 种具有雌花的植物。数据显示，雄性植物的毛状体直径 (11.91 µm) 低于雌性植物 (14.18 µm)。其他参数没有表现出任何统计学上的显着差异（> 0.05）。针对毛状体直径 (0.042) 获得的模型系数的综合测试对于改进模型来说是可靠的，这意味着该模型是最佳拟合。为了检验该模型的有效性，进行了Hosmer和Lemeshow检验，卡方（0.405>0.05）表明上面得到的Logistic模型是最佳拟合模型。进一步研究幼苗阶段的毛状体直径，然后在成熟水平确认植物性别将有助于建立用于性别鉴定的形态标记。