Variation of Seed Characters of Magnolia officinalis From Different Provenances and Families

The variation law and patten were studied of five seed morphologic characters of 19 Magnolia officinalis provenances from 8 provinces in natural distribution.Results show that extremely significant differences are found among different provenances in seed length,seed width,seed thickness and seed length/width;that extremely significant differences are also found among different families in seed length,seed width and seed thickness;that the variation of 100-seed-mass from different provenances is far bigger than that from different families;that the variation range of the former is from 14.147～24.547 g and that of the latter is from 15.003～17.357 g;and that accumulated temperature and heat factors remarkably control the seed morphologic characters such as seed width,seed thickness and 100-seed mass.