Abstract

Abstract Intraclonal variation in Ulmus americana, American elm and U. pumila, Siberian elm was compared with seedling variation in the same species for the following characteristics: height growth; shoot, root, and total fresh weight; stem, leaf, root and total dry weight; root-shoot ratio, and leaf area. Intraclonal variation was as great as seedling variation for all characteristics in 3-month-old American and 12-month-old Siberian elms and for height growth in 13-month-old American elms. It was significantly less for all other characteristics in the 13-month-old American elm clone.

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