ArticleBMC plant biology2024
From buds to shoots: insights into grapevine development from the Witch's Broom bud sport.
Article in BMC plant biology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- A complex reciprocal translocation is linked to reduced gamete viability in a loose-bunch grapevine somatic variant.BMC plant biology · 2026Article
- One-year-old wood morphology and colorimetric indicators of cold hardiness in 'Frontenac' and 'Prairie Star' grapevines.Frontiers in plant science · 2026Article
- The assembly and annotation of two teinturier grapevine varieties, Dakapo and Rubired.GigaByte (Hong Kong, China) · 2025Article
- Small, but mitey: investigating the molecular genetic basis for mite domatia development and intraspecific variation in Vitis riparia using transcriptomics.The New phytologist · 2025Article
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Authors and funding
7 authors.
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Abstract
backgroundBud sports occur spontaneously in plants when new growth exhibits a distinct phenotype from the rest of the parent plant. The Witch's Broom bud sport occurs occasionally in various grapevine (Vitis vinifera) varieties and displays a suite of developmental defects, including dwarf features and reduced fertility. While it is highly detrimental for grapevine growers, it also serves as a useful tool for studying grapevine development. We used the Witch's Broom bud sport in grapevine to understand the developmental trajectories of the bud sports, as well as the potential genetic basis. We analyzed the phenotypes of two independent cases of the Witch's Broom bud sport, in the Dakapo and Merlot varieties of grapevine, alongside wild type counterparts. To do so, we quantified various shoot traits, performed 3D X-ray Computed Tomography on dormant buds, and landmarked leaves from the samples. We also performed Illumina and Oxford Nanopore sequencing on the samples and called genetic variants using these sequencing datasets.
resultsThe Dakapo and Merlot cases of Witch's Broom displayed severe developmental defects, with no fruit/clusters formed and dwarf vegetative features. However, the Dakapo and Merlot cases of Witch's Broom studied were also phenotypically different from one another, with distinct differences in bud and leaf development. We identified 968-974 unique genetic mutations in our two Witch's Broom cases that are potential causal variants of the bud sports. Examining gene function and validating these genetic candidates through PCR and Sanger-sequencing revealed one strong candidate mutation in Merlot Witch's Broom impacting the gene GSVIVG01008260001.
conclusionsThe Witch's Broom bud sports in both varieties studied had dwarf phenotypes, but the two instances studied were also vastly different from one another and likely have distinct genetic bases. Future work on Witch's Broom bud sports in grapevine could provide more insight into development and the genetic pathways involved in grapevine.
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