F1 Hybrids of Globe Artichoke of 'Romanesco' Type

Bianco, Chiara Lo; Micozzi, F.; Jordan, J.R.; Jordan, A. M.; Crinò, P.; Temperini, Andrea; Pagnotta, M.A.; Saccardo, F.

doi:10.17660/actahortic.2012.942.15

Cited by 4 publications

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“…Recent investment into breeding has succeeded in generating hybrid cultivars marketed as seed. In this form, cultivation is more readily mechanised and the risk of disease is reduced (Zaniboni, 2009;Lo Bianco et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

The phenology of seed-propagated globe artichoke

2013

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The ability of globe artichoke to produce inflorescences (capitula) during the autumn when the market price is highest is lost when plants are propagated from seed, as are most F 1 hybrid cultivars. To gain an understanding of the phenology of seed-propagated globe artichoke, both vernalised and nonvernalised seedlings grown from open pollinated progeny of 'Spinoso sardo' plants were transplanted into the field at two monthly intervals covering a whole year. Final leaf number and the date of unfolding of each leaf were used to calculate the phyllochrons. The average final leaf number increased from 24 to 88 in response to increasing daylength above an approximately 11 h threshold during the first 30 days after emergence, and this variate explained about 90% of the variation in the thermal time taken to reach the bolting stage. The average phyllochron ranged from 56 to 96°Cd among the six emergence dates and was the major underlying physiological cause of the loss of early flowering shown by seed-propagated plants. Genotypic variation for phyllochron within an emergence date was strongly associated with variation for the length of the emergence to bolting stage period. The limited effect of vernalisation on development indicated that the late flowering tendency of seed-propagated plants cannot be attributed to an unfulfilled cold requirement.

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Section: Introductionmentioning

confidence: 99%