Comparative study of seed morphological and characteristics in seed orchard of Pinus koraiensis

Morphological characteristics of Pinus koraiensis seed in fifteen clones in seed orchards from Hegang and Teili were analyzed,the results suggested that there were extremely significant differences in thousand kernel weight,seed kernel weight and seed coat weight index,however,the differences among kernel percent,seed kernel / coat weight,length,width and length- width ratio index were not significant. Thousand kernel weight were significantly and positively correlated to seed kernel weight,coat weight,weight and length; seed kernel weight / coat weight were significantly and positively correlated to weight and length; seed coat weight were significantly and positively correlated to weight and length,so did width and length. Moreover,kernel percent were no significant correlation with other characteristics. Index variation coefficient correlating with seed quality appeared a large difference among the two seed orchards,and the variation coefficient of seed form index showed less differences,explaining that seed qualities were greatly influenced by environmental factors,seed form were less affected. Seed characteristics were not only affected by the environment factors,but also related to the interaction of genotype and environment.