期刊
JOURNAL OF INSECT PHYSIOLOGY
卷 49, 期 5, 页码 397-405出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/S0022-1910(03)00057-X
关键词
polydnaviruses; evolution; parasitoids; phylogeny; ascoviruses
Our current, still limited, understanding of the comparative biology and evolution of polydnaviruses (PDVs) is reviewed, especially in the context of the possible origins of these parasitoid viruses and of their coevolution with carrier wasps. A hypothetical scenario of evolution of PDVs from ascovirus (or ascovirus-like) ancestors is presented, with examples of apparent extant transitional forms. PDVs appear, in the case of bracoviruses, to show phylogenetic relationships that mirror those of their wasp carriers: with ichno-viruses, the picture is less clear. Ongoing sequencing studies of entire PDV genomes from diverse wasp species are likely to greatly contribute to our understanding of PDV evolution. (C) 2003 Elsevier Science Ltd. All rights reserved.
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