An analysis of some physiological and agronomic characteristics in relation to morphological traits of field-grown potato (Solanum tuberosum L.) cultivars
1996
Fonseka, H. (Kagawa Univ., Miki (Japan). Faculty of Agriculture) | Asanuma, K.
Morphology, light interception, growth, and dry matter production of five potato cultivars were followed. On the basis of the morphological data five cultivars can be divided into two distinct groups namely stemmy and leafy types. Dejima, Norin No.1 and Nishiyutaka having tall stature, lower leaf area, more axillary branches on the main stem, and low leaf to stem mass ratio qualify them as stemmy types in comparison to May Queen and Irish Cobbler which exhibited characteristics of leafy types i.e., short stature, higher leaf area,less branches, and high leaf to stem mass ratio. Leafy types had lower light interception than stemmy types. Stemmy types recorded higher crop growth rate (CGR), net assimilation rate (NAR), tuber growth rate (TGR) and economic assimilation rate (EAR) than leafy types. Total tuber number per plant was higher in leafy types than stemmy types. As a result average tuber weight and the percentage of marketable tubers were higher in stemmy types than leafy types. Both source and sink efficiencies were high in stemmy types . Irish Cobbler had higher harvest index while Dejima had the lowest. Average tuber weight and percentage of marketable tubers were higher in stemmy types than leafy types
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