Key Laboratory of Cell Proliferation and Differentiation (Ministry of Education), College of Life Science, Peking University, 100871 Beijing, China.
J Plant Res. 2010 Mar;123(2):201-6. doi: 10.1007/s10265-009-0291-z. Epub 2010 Jan 7.
It is widely believed that plastid and mitochondrial genomes are inherited through the maternal parent. In plants, however, paternal transmission of these genomes is frequently observed, especially for the plastid genome. A male gametic trait, called potential biparental plastid inheritance (PBPI), occurs in up to 20% of angiosperm genera, implying a strong tendency for plastid transmission from the male lineage. Why do plants receive organelles from the male parents? Are there clues in plastids that will help to elucidate the evolution of plants? Reconstruction of the ancestral state of plastid inheritance patterns in a phylogenetic context provides insights into these questions. In particular, a recent report demonstrated the unilateral occurrence of PBPI in angiosperms. This result implies that nuclear cytoplasmic conflicts, a basic driving force for altering the mode of organelle inheritance, might have arisen specifically in angiosperms. Based on existing evidence, it is likely that biparental inheritance may have occurred to rescue angiosperm species with defective plastids.
人们普遍认为质体和线粒体基因组通过母系遗传。然而，在植物中，这些基因组的父系传递经常被观察到，特别是对于质体基因组。一种叫做潜在的双亲质体遗传（PBPI）的雄性配子特征，发生在多达 20%的被子植物属中，这意味着质体从雄性系传递的强烈趋势。为什么植物从父本接收细胞器？质体中有什么线索可以帮助阐明植物的进化？在系统发育背景下重建质体遗传模式的祖先状态提供了对这些问题的深入了解。特别是，最近的一份报告表明，在被子植物中，PBPI 是单侧发生的。这一结果意味着，核质冲突，改变细胞器遗传模式的基本驱动力，可能是在被子植物中特有的。基于现有证据，双亲遗传可能是为了拯救具有缺陷质体的被子植物物种而发生的。
