Journal of Taiwan Agricultural Research

Author:Yi-Kung Lin*, Sin-Yi Liu, Ruey-Sheng Lai, Min-Fu Hu, Jui-Lung Kao, and Yuan-Ten Shyu

Abstract:

    To understand the response of selection of Vitis thunbergii, We Compared phenotypic variation and correlations among agronomic characters including root production. Two field experiments were conducted in 1999 and 2000 at the experiment field of TARI (Taichung). Ten Lines of Vitis thunbergii Sieb. et. Zucc. var. taiwaniana and two Vitis adstricta Hance were grown in two randomized complete block designs with three replication. Two experiments differed in respect to irrigation regime. The values of eleven characters and relationships of nine characters were assessed. Most of the characters including root yield and main stem diameter showed considerable genotypic and phenotypic variations. Water flooding significantly decreased root yield and its components, however, β-sitosterol content did not differ significantly. Genotypic and phenotypic correlations revealed that root yield had significant positive correlations with main root diameter, main stem diameter, plant height branch weight and main stem weight under normal irrigation. Root yield had significant correlations with β-sitosterol content and main stem diameter under normal irrigation regime, while these correlations became insignificant under water flooding conditions.

Key words:Vitis thunbergii var. taiwaniana, Vitis adstricta Hance, phenotypic variation, correlation, selection, cultivation

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