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Complete genome of Sweet potato leaf curl viruses (SPLCVs)

ABSTRACT: Recombination and Darwinian selection as drivers of genetic diversity and evolution of sweet potato leaf curl viruses in Tanzania

PROVIDER: PRJEB50672 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	ERR8522184_1.fastq.gz	Fastqsanger.gz
	ERR8522184_2.fastq.gz	Fastqsanger.gz
	ERR8522185_1.fastq.gz	Fastqsanger.gz
	ERR8522185_2.fastq.gz	Fastqsanger.gz
	ERR8522186_1.fastq.gz	Fastqsanger.gz

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Large-Scale Seedling Grow-Out Experiments Do Not Support Seed Transmission of Sweet Potato Leaf Curl Virus in Sweet Potato.

Project description:Sweet potato leaf curl virus (SPLCV) threatens global sweet potato production. SPLCV is transmitted by Bemisia tabaci or via infected vegetative planting materials; however, SPLCV was suggested to be seed transmissible, which is a characteristic that is disputed for geminiviruses. The objective of this study was to revisit the validity of seed transmission of SPLCV in sweet potato. Using large-scale grow-out of sweet potato seedlings from SPLCV-contaminated seeds over 4 consecutive years, approximately 23,034 sweet potato seedlings of 118 genotype entries were evaluated. All seedlings germinating in a greenhouse under insect-proof conditions or in a growth chamber were free of SPLCV; however, a few seedlings grown in an open bench greenhouse lacking insect exclusion tested positive for SPLCV. Inspection of these seedlings revealed that B. tabaci had infiltrated the greenhouse. Therefore, transmission experiments were conducted using B. tabaci MEAM1, demonstrating successful vector transmission of SPLCV to sweet potato. Additionally, tests on contaminated seed coats and germinating cotyledons demonstrated that SPLCV contaminated a high percentage of seed coats collected from infected maternal plants, but SPLCV was never detected in emerging cotyledons. Based on the results of grow-out experiments, seed coat and cotyledon tests, and vector transmission experiments, we conclude that SPLCV is not seed transmitted in sweet potato.

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