GEOGRAPHICAL VARIATION AND GENOTYPIC STABILITY OF ULMUS PUMILA

This paper reported the results of a provenance trial of Ulmus pumila L., in which 46 seedlots and 14 locations were involved. It was found out that there were significant differences among provenances in height growth and DBH at age of 7-year-old. The geographic variation in growth showed a clinal pattern. The genotypic stability and productivity of each provenance were analysed. The variance components indicated that the provenance and site effect were highly significant. The provenance × Location interaction effect was significant. The Ecovalence and PQI of Wricke were used as an index of stability and productivity of various provenances. The superior provenances located in the southeast part of the range.