| Budget Amount *help |
¥25,870,000 (Direct Cost: ¥19,900,000、Indirect Cost: ¥5,970,000)
Fiscal Year 2020: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2018: ¥9,490,000 (Direct Cost: ¥7,300,000、Indirect Cost: ¥2,190,000)
Fiscal Year 2017: ¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
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| Outline of Final Research Achievements |
In this study, we have evaluated our hypothesis that sex chromosomes are advantageous in diminishing sexual conflict by acquiring sex-biased genes. To this goal, we have exhaustively examined the expression level of genes in the three species who independently acquired the neo-sex chromosomes and their closely-related species. We found many orthologous genes that show sex-biased expression in the species with neo-sex chromosomes but show unbiased expression in the closely-related species without neo-sex chromosomes. Such genes are often located on the neo-sex chromosomes. We also found that this pattern is particularly conspicuous in larva. From these results, we speculate that acquisition of neo-sex chromosomes may have contributed to reduce the sexual conflict for survival and development rather than reproduction.
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