Journal of Taiwan Agricultural Research

Author:Yihjuh Shiau1*、Tsungchun Lin*、Yuhjyuan Lee

Abstract:

Fragaria ×ananassa Duch. ‘Tainung No. 1’ is a variety bred through cross-pollination between ‘Xiang-Shui’ (female parent) and ‘Taoyuan No. 1’ (male parent). This study aimed to investigate the horticultural characteristics of ‘Tainung No. 1’ and its two parents and to test their resistance to powdery mildew. The results showed that, under the test conditions, the plants of ‘Tainung No. 1’ (18.5 cm) and ‘Xiang-Shui’ (18.6 cm) were significantly taller than those of ‘Taoyuan No. 1’ (14.8 cm). Furthermore, the plant width of ‘Taoyuan No. 1’ (39.3 cm) was greater than that of ‘Tainung No. 1’ (37.5 cm) and ‘Xiang-Shui’ (36.8 cm). The number of stolon (7.6), terminal leaflet leaf length (10.6 cm), leaf width (10.2 cm), and trifoliolate leaf area (308.6 cm2) of ‘Taoyuan No. 1’ per plant were significantly larger than those of the other two varieties, but the petiole length (11.0 cm) was the shortest. The average total number of inflorescence per plant (7.1), the number of fruits per inflorescence (12.7), and the average fresh weight of fruits (13.2 g) for ‘Xiang-Shui’ were all higher than those of ‘Tainung No. 1’ and ‘Taoyuan No. 1’. However, the fruit hardness of ‘Tainung No. 1’ was higher (0.8–0.9 kg cm-2), and the soluble solids content (9.5–10.4°Brix) was similar to that of ‘Taoyuan No. 1’ (8.5–11.8°Brix), while that of ‘Xiang-Shui’ (6.2–7.4°Brix) was lower. The ‘Taoyuan 
No. 1’ has a higher fruit acidity of 0.34–0.44% than the other two varieties, but its resistance to powdery mildew is not as good as ‘Xiang-Shui’ and ‘Tainung No. 1’. These results may provide farmers with a reference for cultivating strawberries.

Key words:Disease resistance, Fragaria ×ananassa Duch. ‘Tainung No. 1’, Fragaria ×ananassa Duch. ‘Taoyuan No. 1’, Fragaria ×ananassa Duch. ‘Xiang-Shui’, Powdery mildew

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