the emergence of maize streak virus as an agricultural pathogen
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منابع مشابه
Recombination, decreased host specificity and increased mobility may have driven the emergence of maize streak virus as an agricultural pathogen
Maize streak virus (MSV; family Geminiviridae, genus Mastrevirus), the causal agent of maize streak disease, ranks amongst the most serious biological threats to food security in subSaharan Africa. Although five distinct MSV strains have been currently described, only one of these - MSV-A - causes severe disease in maize. Due primarily to their not being an obvious threat to agriculture, very l...
متن کاملDating the origins of the maize-adapted strain of maize streak virus, MSV-A
Maize streak virus (MSV), which causes maize streak disease (MSD), is one of the most serious biotic threats to African food security. Here, we use whole MSV genomes sampled over 30 years to estimate the dates of key evolutionary events in the 500 year association of MSV and maize. The substitution rates implied by our analyses agree closely with those estimated previously in controlled MSV evo...
متن کاملReconstructing the history of Maize streak virus
64 65 Maize streak virus (MSV) strain A, the causal agent of Maize streak disease is 66 today one of the most serious biotic threats to African food security. Determining 67 where MSV-A originated and how it spread trans-continentally could yield 68 valuable insights into its historical emergence as a crop pathogen. Similarly, 69 determining where the major extant MSV-A lineages arose could ide...
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Sub-Saharan Africa could have a shortfall of nearly 90Mt of cereals by the year 2025 if current agricultural practices are maintained. Biotechnology is one of the ways to improve agricultural production. Insect-resistant varieties of maize and cotton suitable for the subcontinent have been identified as already having a significant impact. Virus-resistant crops are under development. These incl...
متن کاملA three-nucleotide mutation altering the Maize streak virus Rep pRBR-interaction motif reduces symptom severity in maize and partially reverts at high frequency without restoring pRBR-Rep binding.
Geminivirus infectivity is thought to depend on interactions between the virus replication-associated proteins Rep or RepA and host retinoblastoma-related proteins (pRBR), which control cell-cycle progression. It was determined that the substitution of two amino acids in the Maize streak virus (MSV) RepA pRBR-interaction motif (LLCNE to LLCLK) abolished detectable RepA-pRBR interaction in yeast...
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