Zhang Yang, Xu Guo-hua, Guo Xing-yi, Fan Long-jiang
J Zhejiang Univ Sci B. 2005 Feb;6(2):87-90. doi: 10.1631/jzus.2005.B0087.
An ancient genome duplication (PPP1) that predates divergence of the cereals has recently been recognized. We report here another potentially older large-scale duplication (PPP2) event that predates monocot-dicot divergence in the genome of rice (Oryza sativa L.), as inferred from the age distribution of pairs of duplicate genes based on recent genome data for rice. Our results suggest that paleopolyploidy was widespread and played an important role in the evolution of rice.
最近人们认识到,在谷物分化之前存在一次古老的基因组复制事件(PPP1)。我们在此报告另一个可能更古老的大规模复制事件(PPP2),根据水稻(Oryza sativa L.)基因组中重复基因对的年龄分布推断,该事件发生在单子叶植物与双子叶植物分化之前。我们的研究结果表明,古多倍体现象广泛存在,并在水稻进化中发挥了重要作用。