Genetic diversity and reproductive traits in triploid and tetraploid populations of Gladiolus tenuis (Iridaceae)

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• 作者：N. Kutlunina ; M. Permyakova ; A. Belyaev
• 关键词：AFLP fingerprinting ; Clonal plant ; Genotypic diversity ; Gladiolus tenuis ; Sterility
• 刊名：Plant Systematics and Evolution
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：303
• 期：1
• 页码：1-10
• 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

Most perennial herbaceous plants are able to reproduce vegetatively as well as sexually. Sometimes, such plants may lose the capacity for sexual reproduction. We have studied the case of sterility in triploid populations (2n = 3x = 45) of Gladiolus tenuis M.Bieb. in a considerable part of its area of distribution. Initially, we recorded the presence of a large clone of G. tenuis to the east of the Volga River, as a result of isozyme analysis. We also used AFLP fingerprinting to genotype 55 samples from 10 populations of G. tenuis and one population of the closely related G. imbricutus L. This analysis revealed an extremely low genetic diversity in sterile triploid populations of G. tenuis and a rather high genetic diversity in fertile tetraploid populations (2n = 4x = 60) over most of the area of this species. Genetic distances between fertile and sterile populations of G. tenuis were similar to those between different species of gladioli. It appears that a single sterile genotype has spread vegetatively over 800 km, propagating by daughter corms. The study of the reproductive features of G. tenuis suggests that the cause of sterility may be self-incompatibility between individuals of the clone.