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首页> 外文期刊>Trends in Plant Science >Paramutation: an encounter leaving a lasting impression
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Paramutation: an encounter leaving a lasting impression

机译:变异:一次相遇留下持久的印象

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Paramutation is the result of heritable changes in gene expression that occur upon interaction between alleles. Whereas Mendelian rules, together with the concept of genetic transmission via the DNA sequence, can account for most inheritance in sexually propagating organisms, paramutation-like phenomena challenge the exclusiveness of Mendelian inheritance. Most paramutation-like phenomena have been observed in plants but there is increasing evidence for its occurrence in other organisms, including mammals. Our knowledge of the underlying mechanisms, which might involve RNA silencing, physical pairing of homologous chromosomal regions or both, is still limited. Here, we discuss the characteristics of different paramutation-like interactions in the light of arguments supporting each of these alternative mechanisms.
机译:变异是等位基因之间相互作用时基因表达可遗传变化的结果。孟德尔规则以及通过DNA序列进行遗传传播的概念可以解释性传播生物中的大多数遗传,而类似突变的现象则对孟德尔遗传的排他性提出了挑战。在植物中已观察到大多数类似突变的现象,但越来越多的证据表明它在包括哺乳动物在内的其他生物中也发生。我们对可能涉及RNA沉默,同源染色体区域的物理配对或两者的潜在机制的了解仍然有限。在这里,我们根据支持这些替代机制中每一种的论据来讨论不同的类似变异的相互作用的特征。

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