Journal of Taiwan Agricultural Research

Author:Wei-Zheng Yang*, Chi-Hsiung Hsiao, Chiou-Hsiung Huang and Pan-Chi Liou

Abstract:

    The newly released vegetable sponge ‘Tainung No.1’ is a F1 hybrid. The male parent was derived from eight generations of selfing of a local variety originally from Pintung area. The female parent was an inbred line, fixed from a series of backcrossing an interspecific hybrid (Luffa aegyptiaca ‘Mu-kua’ Î L. acutangula ‘CITC-70-181’) as non-recurrent parent to L. aegyptiaca ‘Mi-tun-kua’ as re-current parent. The Fl hybrid variety ‘Tainung No.1’ has fruit of cylindrical type. This new variety has good vigor, predominantly female flowers and sets fruits early. Its fruit is in dark green color and with good quality. It has resistance to several viruses, including Zucchini yellow mosaic virus (ZYMV), type W isolate of Papaya ringspot virus (PRV-W), and Melon vein-banding mosaic virus (MVbMV). The fruit size of ‘Tainung No.1’ is about 20 cm long and 7 cm wide, and its fruit weights about 560 gr in average. With good crop management, the variety is capable of giving a yield of 55,000 kg/ha. The plant is insensitive to day-length, thus its cultivation can be scheduled not only in autumn, but also in summer season, and thus avoid the chill to seedlings in winter season. It is practical for off-season production. We also used molecular marker, i.e. RAPD, to identify different vegetable sponge varieties. It was found that a band of 1,100 bp amplified by a 10-mer primer “OPC20” was only obtained with ‘Tainung No.1’ and its male parent line. This polymorphic marker could be used for variety identification and seed purity test.

Key words:Vegetable sponge, Breeding, Interspecific hybridization, Disease resistance

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