Genetic Diversity and Breeding Strategies in Passiflora Species

Passiflora species exhibit a rich tapestry of genetic variation spanning cultivated and wild relatives, underpinning efforts to enhance fruit quality, disease resistance and agronomic performance. Wild germplasm collections have revealed extensive allele richness for traits such as virus tolerance, fruit morphology and flavour profiles, yet domestication bottlenecks have narrowed the genetic base of commercial cultivars. Molecular approaches—ranging from simple sequence repeats to single-nucleotide polymorphisms—have enabled detailed characterisation of germplasm and informed the design of pre-breeding programmes. Conventional methods, including recurrent selection and grafting, remain central to combining favourable traits, while emerging strategies harness genome-wide marker data and genomic selection models to predict breeding values early in development cycles. Advances in tissue culture and protoplast transformation now facilitate functional analysis of candidate genes and targeted genome editing, accelerating trait introgression. Integrated databases that collate genomic, transcriptomic and phenotypic datasets provide user-friendly interfaces for breeders and researchers, promoting data reuse and discovery. Collectively, these innovations are fostering the development of passion fruit cultivars with improved yield stability, resistance to woodiness and fungal diseases, and enhanced nutritional and ornamental value. As global demand rises, coordinated efforts to conserve wild diversity, refine molecular toolkits and deploy predictive breeding frameworks will be pivotal in securing sustainable production of this culturally and economically significant genus.

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Genetic Diversity and Breeding Strategies in Passiflora Species publication trend

The graph below shows the total number of articles in genetic diversity and breeding strategies in passiflora species across all publications each year (not limited to Nature Index journals).

Technical terms

Germplasm: A collection of genetic resources, such as seeds or tissue, maintained for breeding and conservation.

Protoplast: A plant cell stripped of its cell wall, used for direct DNA delivery and cellular assays.

Microsatellite marker: A repetitive DNA sequence of two to six base pairs used for genotyping and diversity analysis.

Selection index: A statistical tool combining multiple trait measurements into a single value for selecting superior individuals.

Genomic selection: A breeding approach that uses genome-wide marker data to predict the performance of individuals before phenotypic evaluation.

References

1. Cotyledon peeling method for passion fruit protoplasts: a versatile cell system for transient gene expression in passion fruit (Passiflora edulis). Frontiers in Plant Science (2023).
2. Passionfruit Genomic Database (PGD): a comprehensive resource for passionfruit genomics. BMC Genomics (2024).
3. Occurrence of passion fruit woodiness disease in the coastal lowlands of Kenya and screening of passion fruit genotypes for resistance to passion fruit woodiness disease. BMC Plant Biology (2023).