| Budget Amount *help |
¥17,030,000 (Direct Cost: ¥13,100,000、Indirect Cost: ¥3,930,000)
Fiscal Year 2019: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2018: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2017: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2016: ¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
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| Outline of Final Research Achievements |
The objective of this study was to elucidate the evolutionary phenomenon of a decrease in the basic chromosome number toward the arid zone in the genus Brachyscome.
Phylogenetic analysis of all collected species of the genus was conducted using whole chloroplast genome sequences and MIGseq analysis. Species belonging to the B. linealoba complex diverged at the base of the phylogenetic tree and formed a sister group with other species. In the B. linealoba complex, the first branch in this clade was found to be the out-breeding form, and two self-breeding forms were derived from its sister branches.
DNA sequence information on expressed genes obtained from RNAseq analysis showed a weak inverse correlation between the frequency of gene duplication, mutations judged to be detrimental, and chromosome number.
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