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| 著者 | Mizuta Y, Harushima Y, Kurata N. | |
| タイトル | Rice pollen hybrid incompatibility caused by reciprocal gene loss of duplicated genes. | |
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Abstract: Genetic incompatibility is a barrier contributing to species isolation and is caused by genetic interactions. We made a whole genome survey of two-way interacting loci acting within the gametophyte or zygote using independence tests of marker segregations in an F(2) population from an intersubspecific cross between O. sativa subspecies indica and japonica. We detected only one reproducible interaction, and identified paralogous hybrid incompatibility genes, DOPPELGANGER1 (DPL1) and DOPPELGANGER2 (DPL2), by positional cloning. Independent disruptions of DPL1 and DPL2 occurred in indica and japonica, respectively. DPLs encode highly conserved, plant-specific small proteins (竏ｼ10 kDa) and are highly expressed in mature anther. Pollen carrying two defective DPL alleles became nonfunctional and did not germinate, suggesting an essential role for DPLs in pollen germination. Although rice has many duplicated genes resulting from ancient whole genome duplication, the origin of this gene duplication was in recent small-scale gene duplication, occurring after Oryza-Brachypodium differentiation. Comparative analyses suggested the geographic and phylogenetic distribution of these two defective alleles, showing that loss-of-function mutations of DPL1 genes emerged multiple times in indica and its wild ancestor, O. rufipogon, and that the DPL2 gene defect is specific to japonica cultivars. |
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| 掲載誌 | Proc. Natl. Acad. Sci. U.S.A. | |
| Country | Japan | |
| 刊数 | 107(47) | |
| ページ | 20417-22 | |
| 発刊年 | 2010 | |
| PubMed ID | 21048083 | |
| PubMed Central ID | - | |
| DOI | 10.1073/pnas.1003124107 | |
| URL | - | |
| 関連情報 | ||
| 遺伝子 | DPL1 DPL2 | |
| INSD | AB534816 AB534817 AB534818 AB534819 AB534820 AB534821 AB534822 AB534823 AB534824 AB534825 AB534826 AB534827 AB534828 AB534829 AB534830 AB534831 AB534832 AB534833 AB534834 AB534835 AB534836 AB534837 AB534838 AB534839 AB534840 AB534841 AB534842 AB534843 AB534844 AB534845 AB534846 AB534847 AB534848 AB534849 AB534850 AB534851 AB534852 AB534853 AB534854 AB534855 AB534856 AB534857 AB534858 AB534859 AB534860 AB534861 AB534862 AB534863 AB534864 AB534865 AB534866 AB534867 AB534868 AB534869 AB534870 AB534871 AB534872 AB534873 AB534874 AB534875 AB534876 AB534877 AB534878 AB534879 AB534880 AB534881 AB534882 AB534883 AB534884 AB534885 AB534886 AB534887 AB534888 AB534889 AB534890 AB534891 AB534892 AB534814 AB534894 AB534895 AB534896 AB534897 AB535626 AB535627 AB535628 AB560672 AB560673 AB534893 AB534815 | |
| 系統 |
野生イネ コアコレクション |
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| 突然変異系統(遺伝研 Collection) | - | |
| 種子不稔系統 | - | |
| 致死変異体系統 | - | |
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組織別発生段階 - 突然変異系統(遺伝子) |
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| 栽培イネ品種(遺伝研 Collection) | - | |
| 組織別発生段階 | - | |
