Abstract
The germplasm of Rubus is highly diverse and has important features for cultivated plant improvement, such as resistance to diseases and pests. Hybrids of Mora de Castilla have been observed in the wild. Rubus glaucus Benth was an allopolyploid obtained by hybridization between a black raspberry and a South American blackberry. Mora de Castilla is an important breeding material due to its large fruit size, low chilling requirements, excellent fruit quality, aroma, small drupelets, seeds, everbearing production habit, and resistance to root diseases. Particularly, Mora de Castilla has great potential as a parent to improve the size and quality of cultivated Rubus species. Mora de Castilla cultivars have been selected for breeding and improvement purposes in Colombia and Ecuador. These countries have implemented breeding programs that have identified and selected high-yield plant materials. Wild-type Mora de Castilla has been bred among commercial cultivars to improve their quality features. Germplasm repositories are important for maintaining cultivar diversity.
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