Speciation and phenological analyses of ancestral Carex (Cyperaceae)

2015 Fiscal Year Final Research Report

• Project/Area Number: 25840136
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Biodiversity/Systematics
• Research Institution: Okayama University of Science
• Principal Investigator: YANO Okihito 岡山理科大学, 生物地球学部, 講師 (60582757)
• Research Collaborator: HOSHINO Takuji 岡山理科大学, 生物地球学部, 教授 ; IKEDA Hiroshi 東京大学, 総合研究博物館, 准教授 ; JIN Xiao-Feng 杭州師範大学, 教授
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: 系統分類 / 系統進化 / カヤツリグサ科

Outline of Final Research Achievements

Carex L. (Cyperaceae) is one of the largest genera of flowering plants and is known as a predominantly wind-pollinated genus based on the floral characters. In Carex, section Siderostictae is thought to be an ancestral group. This study aimed to clarify the phylogenetic relationships, chromosomal variations and ecological features within the section Siderostictae and allies. Our results indicate that a monophyletic Siderostictae clade, including the sections Hemiscaposae , Siderostictae and Surculosae, as the earliest diverging group in Carex. Low chromosome numbers, 2n=12 or 2n=24, with large sizes were observed in Siderostictae clade. We also observed that a honeybee, Apis cerana heimifeng, made frequent visits to the inflorescences and collected pollen grains from Carex scaposa in the Siderostictae clade.

Free Research Field

植物系統分類