| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2015: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Outline of Final Research Achievements |
Allopolyploid arise as a result of the hybridization between two related species and genome doubling, which has long been recognized as an important mode of plant speciation. In this project, we investigated genome-wide nucleotide polymorphisms of three endemic Ficus species in the Ogasawara Islands to reveal the genetic background of allopolyploid speciation of these species. The analyses based on single-copy nuclear genes and RAD-seq markers suggested that F. iidaiana (allotetraploid) has two divergent parental lineages. The divergence time between the parental lineages was estimated to be roughly 25-33 MYA. All of the endemic Ficus species have low levels of nucleotide diversity and there was a significant genetic differentiation between the diploid species (F. boninshimae and F. nishimurae) and F. iidaiana.
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