Folia Horticulturae

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Utilization of three non-ripening mutants in tomato breeding for prolonged shelf life

Anna Seroczyńska, Katarzyna Niemirowicz-Szczytt, Aleksandra Korzeniewska

Department of Plant Genetics, Breeding and Biotechnology
Warsaw Agricultural University
Nowoursynowska 166, 02-787 Warszawa, Poland

The aim of the investigation was to evaluate F1 hybrids incorporating nor, rin, and Nr genes with respect to yield, fruit quality, and shelf life. The studies were started in 1984 and in the period from 1985-1992 a series of comparative experiments with F1 hybrids was carried out. ‘Sława Nadrenii’ was the standard cultivar. The total yield and commercial yield of F1 hybrids were analysed. The storage life and percentage of sound fruits picked at mature green, breaker, and ripe stages were estimated.

F1 hybrids have the best fruit colour, firmness, and shelf life of the three groups of studied hybrids. Most of the F1 hybrids with nor gene yielded at the level of ‘Sława Nadrenii’, whereas the best (C 36×nor and S 15×nor) exceeded it significantly in some years.

In the period 1985-1989 the last harvesting took place in the middle of at the end of September and the storage time lasted for 77 (1988) to 99 days (1986). Changing the way of growing plants from the field to a non-heated plastic tunnel caused a 2-4 weeks delay of the last harvest and a shift in the storage period besides fruit quality improvement.

The ripe fruits of the best hybrids were stored on average to 2-4 weeks longer than ‘Sława Nadrenii’, and breaker and green 2-3 weeks longer. F1 hybrids of nor were also superior to ‘Sława Nadrenii’ with respect to fruit firmness. The stage of maturity at harvest affected the final fruit colour, flavour, and shelf life of the studied hybrids. The breaker fruits combined good quality with long shelf life. In 1996 hybrid S×15 nor was registered as ‘Rafał F1’.

Seroczyńska A., Niemirowicz-Szczytt K., Korzeniewska A., 1998. Utilization of three non-ripening mutants in tomato breeding for prolonged shelf life. Folia Horticulturae 10/1: 3-14.