Tomato (Lycopersicon esculentum L.) is one of the most important vegetable crop, everywhere grown in Italy as hybrid or local varieties. Some of them are taking an increasing interest, because of their good quality, whereas some others play a role as a niche production. Taking into account the economic importance of such a crop, a research project (‘Valorisation of horticultural Italian germplasme’ sponsored by MIUR and MIPAF) was started to: i) recover, characterise, exploit the best tomato local types, also by genetic improvement; ii) obtain a genetic stabilization of some accessions to make HF1 hybrids improved for yield quality and resistance to biotic and abiotic stresses; iii) collect and preserve several other Italian local varieties. New traditional accessions have been recovered, belonging to ‘Locale di Belmonte’ , ‘Rosa di Rotonda’ and ‘Rosso di Rotonda’, ‘Pizzutello’, ‘Cuore di Bue’ typologies. Some variability in both the morphometric traits of fruits and the seed gluteline fingerprinting was shown among the accessions belonging to the same morpho-type. HF1 hybrids made by crossing local varieties belonging to a same morpho-type (‘Cuor di bue Ligure or di Albenga’, ‘Rosa and Rosso di Rotonda’, ‘Rosa di Sorrento’, ‘Pera d’Abruzzo’, ‘Cuore di Bue’) resulted in a reduction of fruits defects and increased yield. The fruit quality was evaluated both with the traditional chemical destructive analysis and with non destructive NIR (Near Infrared Spectroscopy) instrument. The NIR technique has to be further improved for the detection of -carotene, acidity, dry refractometric residue, but resulted to be reliable for lycopene determination. The primers designed on the gene codifying for the flask-shaped berry, typical of the ‘Cuor di Bue di Albenga’ tomato type, allow to distinguish the wild type ‘Pera d’Abruzzo’ accessions from the ovate-mutated ‘Cuor di Bue di Albega’ ones, with some exceptions. Some local varieties showed to be resistant or tolerant to Verticillium (Eraldo 4), Fusarium wilt (Rosa di Rotonda) or both (Sorrentino). An improved resistance to Verticillium dahliae or Fusarium oxysporum f. sp. lycopersici was observed in different new breeding lines and in segregant populations.
Recupero, caratterizzazione e valorizzazione di varietà locali di pomodoro da mensa
VALENTINO, Danila;TAMIETTI, Giacomo;
2007-01-01
Abstract
Tomato (Lycopersicon esculentum L.) is one of the most important vegetable crop, everywhere grown in Italy as hybrid or local varieties. Some of them are taking an increasing interest, because of their good quality, whereas some others play a role as a niche production. Taking into account the economic importance of such a crop, a research project (‘Valorisation of horticultural Italian germplasme’ sponsored by MIUR and MIPAF) was started to: i) recover, characterise, exploit the best tomato local types, also by genetic improvement; ii) obtain a genetic stabilization of some accessions to make HF1 hybrids improved for yield quality and resistance to biotic and abiotic stresses; iii) collect and preserve several other Italian local varieties. New traditional accessions have been recovered, belonging to ‘Locale di Belmonte’ , ‘Rosa di Rotonda’ and ‘Rosso di Rotonda’, ‘Pizzutello’, ‘Cuore di Bue’ typologies. Some variability in both the morphometric traits of fruits and the seed gluteline fingerprinting was shown among the accessions belonging to the same morpho-type. HF1 hybrids made by crossing local varieties belonging to a same morpho-type (‘Cuor di bue Ligure or di Albenga’, ‘Rosa and Rosso di Rotonda’, ‘Rosa di Sorrento’, ‘Pera d’Abruzzo’, ‘Cuore di Bue’) resulted in a reduction of fruits defects and increased yield. The fruit quality was evaluated both with the traditional chemical destructive analysis and with non destructive NIR (Near Infrared Spectroscopy) instrument. The NIR technique has to be further improved for the detection of -carotene, acidity, dry refractometric residue, but resulted to be reliable for lycopene determination. The primers designed on the gene codifying for the flask-shaped berry, typical of the ‘Cuor di Bue di Albenga’ tomato type, allow to distinguish the wild type ‘Pera d’Abruzzo’ accessions from the ovate-mutated ‘Cuor di Bue di Albega’ ones, with some exceptions. Some local varieties showed to be resistant or tolerant to Verticillium (Eraldo 4), Fusarium wilt (Rosa di Rotonda) or both (Sorrentino). An improved resistance to Verticillium dahliae or Fusarium oxysporum f. sp. lycopersici was observed in different new breeding lines and in segregant populations.
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
