Causes of variation in sexual and asexual reproduction in diploid and triploid populations of Allium scorodoprasum

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• 作者：Birutė Karpavičienė
• 关键词：Allium scorodoprasum ; Bulbils ; Cytotype ; Seed ; Vegetative reproduction
• 刊名：Plant Systematics and Evolution
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：303
• 期：1
• 页码：105-115
• 全文大小：
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Plant Sciences; Plant Ecology; Plant Anatomy/Development; Plant Systematics/Taxonomy/Biogeography;
• 出版者：Springer Vienna
• ISSN：2199-6881
• 卷排序：303

文摘

Allium scorodoprasum is a bulbous geophyte that reproduces by seeds, aerial bulbils, and subterranean daughter bulbs. This research represents the analysis of intraspecific variations in sexual and asexual reproduction in relation to ploidy levels and the environmental conditions from 11 diploid and 24 triploid populations in Lithuania. The results showed that the seed production was extremely rare and occurred only in diploid populations. The numbers of flowers and aerial bulbils per plant as well as mean mass of one bulbil were the characteristics in which differences between ploidy levels were the biggest. The diploids on average produced more (61.9), but smaller (mean mass = 29.6 mg) bulbils and more flowers (16.7), while triploids produced less (41.7), but larger (mean mass = 45.9 mg) bulbils and fewer (5.2) flowers. The study revealed that the main determinant of intracytotypic variation in quantity of both sexual and asexual structures was light availability.