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Garnatje, T.

Publications and source records attributed to Garnatje, T..

2 recordsLinked to original sources

Integrating target capture with whole genome sequencing of recent and natural history collections to explain the phylogeography of wild-growing and cultivated Cannabis

O_LICannabis has provided important and versatile services to humans for millennia. Domestication and subsequent dispersal have resulted in various landraces and cultivars. Unravelling the phylogeography of this genus poses considerable challenges due to its complex history. C_LIO_LIWe relied on a Hyb-Seq approach (combining target capture with shotgun sequencing), with the universal Angiosperms353 enrichment panel, to explore the genetic structure of wild-growing accessions and cultivars by implementing phylogenomic and population genomic workflows on the same Hyb-Seq data. C_LIO_LIOur findings support the treatment of Cannabis as a monotypic genus (C. sativa L.), structured into three main genetic groups--E Asia, Paleotropis, and Boreal--with clear phylogeographic signal despite significant levels of admixture. The E Asia group was sister to the Paleotropis and the Boreal groups. Individuals within the Paleotropis group could be further structured into three subgroups: Iranian Plateau, C & S China and Himalayas, and Indoafrica. Individuals from the Boreal group split into two subgroups: Eurosiberia and W Mongolia and Caucasus and Mediterranean. Hemp and drug-type landraces and cultivars consistently matched their putative geographic origin. C_LIO_LIThese findings enhance our understanding of the genetic patterns in Cannabis and provide a framework for future research into its current and past genetic diversity. C_LI

genomics↗

Intra-leaf modeling of Cannabis leaflet shape produces synthetic leaves that predict genetic and developmental identities

O_LIThe iconic, palmately compound leaves of Cannabis have attracted significant attention in the past. However, investigations into the genetic basis of leaf shape or its connections to phytochemical composition have yielded inconclusive results. This is partly due to prominent changes in leaflet number within a single plant during development, which has so far prevented the proper use of common morphometric techniques. C_LIO_LIHere we present a new method that overcomes the challenge of nonhomologous landmarks in palmate, pinnate and lobed leaves, using Cannabis as an example. We model corresponding pseudo-landmarks for each leaflet as angle-radius coordinates and model them as a function of leaflet to create continuous polynomial models, bypassing the problems associated with variable number of leaflets between leaves. C_LIO_LIWe analyze 341 leaves from 24 individuals from nine Cannabis accessions. Using 3,591 pseudo-landmarks in modeled leaves, we accurately predict accession identity, leaflet number, and relative node number. C_LIO_LIIntra-leaf modeling offers a rapid, cost-effective means of identifying Cannabis accessions, making it a valuable tool for future taxonomic studies, cultivar recognition, and possibly chemical content analysis and sex identification, in addition to permitting the morphometric analysis of leaves in any species with variable numbers of leaflets or lobes. C_LI

developmental biology↗