a melting pot of old world begomoviruses and their satellites infecting a collection of gossypium species in pakistan旧世界的熔炉begomoviruses及其卫星感染gossypium物种在巴基斯坦的集合.pdfVIP

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a melting pot of old world begomoviruses and their satellites infecting a collection of gossypium species in pakistan旧世界的熔炉begomoviruses及其卫星感染gossypium物种在巴基斯坦的集合.pdf

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a melting pot of old world begomoviruses and their satellites infecting a collection of gossypium species in pakistan旧世界的熔炉begomoviruses及其卫星感染gossypium物种在巴基斯坦的集合

A Melting Pot of Old World Begomoviruses and Their Satellites Infecting a Collection of Gossypium Species in Pakistan 1¤ 2 1 Muhammad Shah Nawaz-ul-Rehman , Rob W. Briddon , Claude M. Fauquet * 1 Danforth Plant Science Center, St. Louis, Missouri, United States of America, 2 Agricultural Biotechnology Division, National Institute for Biotechnology and Genetic Engineering, Jhang Road, Faisalabad, Pakistan Abstract CLCuD in southern Asia is caused by a complex of multiple begomoviruses (whitefly transmitted, single-stranded [ss]DNA viruses) in association with a specific ssDNA satellite; Cotton leaf curl Multan betasatellite (CLCuMuB). A further single ssDNA molecule, for which the collective name alphasatellites has been proposed, is also frequently associated with begomovirus- betasatellite complexes. Multan is in the center of the cotton growing area of Pakistan and has seen some of the worst problems caused by CLCuD. An exhaustive analysis of the diversity of begomoviruses and their satellites occurring in 15 Gossypium species (including G. hirsutum, the mainstay of Pakistan’s cotton production) that are maintained in an orchard in the vicinity of Multan has been conducted using Q29 DNA polymerase-mediated rolling-circle amplification, cloning and sequence analysis. The non-cultivated Gossypium species, including non-symptomatic plants, were found to harbor a much greater diversity of begomoviruses and satellites than found in the cultivated G. hirsutum. Furthermore an African cassava mosaic virus (a virus previously only identified in Africa) DNA-A component and a Jatropha curcas mosaic virus (a virus occurring only in southern India) DNA-B component were identified. Consistent with earlier studies of cotton in so