Improving production and health of seed potato stocks in Italy |
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Authors: | P Ranalli E Forti G Mandolino B Casarini |
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Institution: | (1) Istituto Sperimentale per le Colture Industriali, Via di Corticella 133, 40129 Bologna, Italy |
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Abstract: | Summary When nodal explants from sprouts grown from virus-free tubers of ten cultivars were propagated on half-strength Murashige
and Skoog medium, cvs Arsy, Nicola, Kennebec and Spunta grew best. Rooted plantlets, 5–8 cm tall, were transplanted from culture
vessels into pots containing soil, vermiculite and sand. They were weaned by growing in a glasshouse for about three weeks.
Over 90% of the plantlets survived and these were then planted in the field and protected against aphids by a double screen
(a large tunnel covering four adjacent small tunnels) and chemical treatments. Prebasic seed tubers thus obtained were virus-free
and production ranged from 49.9 t.ha−1 (‘Monalisa’) to 27.1 t.ha−1 (‘Majestic’).
A survey showed that ‘elite’ (near virus-free) seed could be produced from prebasic seed by early planting and early haulm
killing regardless of location, but late planting on the plains and normal planting dates on the mountains resulted in 1 to
5% virus infection levels acceptable only for certified seed. |
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Keywords: | multiplication rate screenhouse virus-free field multiplication Solanum tuberosum L |
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