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Comparison of seed morphology of two ginkgo cultivars

作者：

Fang Tian;Yujun Wang;Hardev S. Sandhu;Johan Gielis;Peijian Sh

单位：

Department of Biosciences Engineering, University of Antwerp, Antwerp, Belgium.;Co-Innovation Centre for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, People’s Republic of Chin;Everglades Research and Education Center, University of Florida, Belle Glade, USA;Co-Innovation Centre for Sustainable Forestry in Southern China, Nanjing Forestry University, Nanjing, People’s Republic of China

关键词：

Allometry;Coefficient of variation;Curve fitting;Gielis equation;Root mean squared errors;BILOBA L.;LEAF;GROWTH;SHAPE;RANGE;MODE

摘要：

Ginkgo biloba L. is a precious relic tree species with important economic value. Seeds, as a vital reproductive organ of plants, can be used to distinguish cultivars of the species. We chose 400 seeds from two cultivars of ginkgo ("Fozhi" and "Maling"; 200 seeds for each cultivar) as the study material and used the Gielis equation to fit the projected shape of these seeds. The coefficients of variation (CV) in root mean squared errors (RMSE) obtained from the fitted data were used to compare the level of inter-cultivar variations in seed shape. We also used the covariance analysis to compare the allometric relationships between seed weights and projected areas of these two cultivars. The Gielis equation fitted well the seed shapes of two ginkgo cultivars. The lower CV in RMSE of cultivar "Fozhi" than "Maling" indicated a less symmetrical seed shape in the latter than the former. The bootstrap percentile method showed that the seed shape differences between the two cultivars were significant. However, there was no significant difference in the exponents between the seed weights and the projected areas of these two cultivars. Overall, the significant differences in shapes between the seeds of two ginkgo cultivars were well explained by the Gielis equation; this model can be further extended to compare morphological differences in other ginkgo cultivars, and even for plant seeds or animal eggs that have similar oval shapes.

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Comparison of seed morphology of two ginkgo cultivars

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