| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
Allopolyploidization, the doubling of chromosome number in species hybrids, generates polyploids with genome sets derived from related species. Allopolyploidization is an important process both for angiosperm evolution and for functional innovations, such as the development of inflorescence structure. Bread wheat (Triticum aestivum) is an allohexaploid species with a genome constitution AABBDD which derived from ancestral diploid species. In this study, I examined the expression patterns of homoeologs of class B, C and D MADS-box genes for floral formation. The homoeolog-specific expression pattern was different in every MADS-box gene, and the differential patterns of homoeologs were consistently observed among different hexaploid wheat varieties and synthetic hexaploid wheat lines developed by the artificial crosses between tetraploid wheat and Ae. tauschii. These results suggest that homoeolog-specific regulation of the floral MADS-box occurs in allopolyploid wheat.
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