Genetic Variation of Isoenzyme within Natural Population of Taxus yunnanensis in Yunnan of China
云南红豆杉天然群体内同工酶遗传变异的研究 Genetic Variation of Isoenzyme within Natural Population of Taxus yunnanensis in Yunnan of China

Genetic variation of ten isoenzymes was studied within population of Taxus yunnanensis Cheng et L. K. Fu in the Jinsha River Valley using the method of horizontal starch gel electrophoresis.On the basis of banding analysis,eight enzyme systems , presumablly coded by fifteen isoenzyme loci and their alleles were scored , and fourteen were polymorphic with only one monomorphic locus( ME-3 ). Among them , four polymorphic loci with inevident genetic variation made little contribution to genetic variation of this population and other ten polymorphic loci with evident genetic variation made great contribution to genetic variation of this population . Isoenzyme data indicated high level of genetic variability in this population with P=0.933,A=2.90,He= 0.290 . The taxol content had close relation to genetic variation of population.