Variability of germination in digger pine in California

Abstract

Seeds collected from 17 Pinus sabiniana Dougl. populations in California were tested for germination. Unstratified seeds germinated slower than stratified seeds. Germination of stratified seeds showed distinct population differences. Some populations started germination at 5°C. and reached a level of 60 to 70 percent after 30 days at 25°. Less than 10 percent of the seeds germinated in 30 days at 25°C. in the slowest samples. Replication with seeds from "slow" and "fast" germinating populations showed that the type of response was similar for different samples within a local area, and from the same stand during different years. Seeds from populations in areas with cold winters germinated the slowest.

Citation

Griffin, James R. 1971. Variability of germination in digger pine in California. Res. Note PSW-RN-248. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 6 p