Chare E R, Holmes E C
Department of Zoology, University of Oxford, Oxford, UK.
Arch Virol. 2006 May;151(5):933-46. doi: 10.1007/s00705-005-0675-x. Epub 2005 Nov 15.
The severe economic consequences of emerging plant viruses highlights the importance of studies of plant virus evolution. One question of particular relevance is the extent to which the genomes of plant viruses are shaped by recombination. To this end we conducted a phylogenetic survey of recombination frequency in a wide range of positive-sense RNA plant viruses, utilizing 975 capsid gene sequences and 157 complete genome sequences. In total, 12 of the 36 RNA virus species analyzed showed evidence for recombination, comprising 17% of the capsid gene sequence alignments and 44% of the genome sequence alignments. Given the conservative nature of our analysis, we propose that recombination is a relatively common process in some plant RNA viruses, most notably the potyviruses.
新出现的植物病毒所带来的严重经济后果凸显了植物病毒进化研究的重要性。一个特别相关的问题是植物病毒基因组受重组影响的程度。为此，我们利用975个衣壳基因序列和157个完整基因组序列，对多种正义RNA植物病毒的重组频率进行了系统发育调查。在总共分析的36种RNA病毒物种中，有12种显示出重组的证据，占衣壳基因序列比对的17%和基因组序列比对的44%。鉴于我们分析的保守性质，我们认为重组在一些植物RNA病毒中是一个相对常见的过程，最显著的是马铃薯Y病毒属病毒。
