. Genetic variation and seed transfer guidelines for ponderosa pine in central Oregon. Ponderosa pine, Oregon, Central, Genetics; Plant ecological genetics, Oregon, Central. Table 5—Descriptive characteristics of multiple regression equations relating seed source factor scores to geographic and topographic location variables Characteristic PC-1 PC-2 PC-3 PC-4 Number of significant (p = ) terms in equation 35 34 12 13 R for locations (percent of location variance explained by regression) Lack of fit tests: F-values Degrees of freedom 191,80a 192,80 21
. Genetic variation and seed transfer guidelines for ponderosa pine in central Oregon. Ponderosa pine, Oregon, Central, Genetics; Plant ecological genetics, Oregon, Central. Table 5—Descriptive characteristics of multiple regression equations relating seed source factor scores to geographic and topographic location variables Characteristic PC-1 PC-2 PC-3 PC-4 Number of significant (p = ) terms in equation 35 34 12 13 R for locations (percent of location variance explained by regression) Lack of fit tests: F-values Degrees of freedom 191,80a 192,80 214,80 213,80 Probability, p = Sums of squares (type II, in percent) explained by: Geographic terms 24 6 41 30 Geographic x geographic terms 21 4 45 70 Topographic terms 4 8 0 0 Topographic x topographic terms 4 12 0 0 Geographic x topographic terms 47 70 14 0 a 1st number = lack of fit (error from regression analysis less families in locations), and 2d number = pure error (families in locations). b SAS Institute 1987: 96-98. Values are the percentages of total type II regression sums of squares that were due to simple geographic terms (latitude, distance, and elevation), 1st line; to geographic x geographic interaction terms, 2d line; to simple topographic terms (the 3 slope-aspect transformations), 3d line; and so forth. 10 -10 Distance = 120 kilometers Slope = 0. 1200 1380 1560 1740 1920 Elevation (meters) 2100 Figure 2—Relation between factor scores for principal component-1 and elevation at three latitudes in southern Oregon, other factors constant at slope = 0 percent and distance = 120 kilometers east of the Cascade crest. Plotted lines span the elevational distribution of ponderosa pine at these latitudes and distance. The vertical line is equal to one standard deviation of within-location additive genetic variance of factor score-1 and is equivalent to a transfer risk of 11. Please note that these images are extracted from scanned pa
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