Table 2. Gene flow based on sampled trees within plots for the mixed variety plots (M1–M3), and the sentinel plots (S1–S5) from 2000–2010.

Plot	Range of distance from sampled trees to GE plot (m)	Number of unique trees sampled	Total number of trees sampled	Number of sampled trees with GUS positive embryos	Total Number of embryos sampled	Total Number of GUS Positive embryos	Range of proportion of GUS positive embryos per sampled tree
M1	384.3–384.8	20	52	4	3385	4	0–0.022
M2	478.2–490.0	3	7	1	918	2	0–0.004
M3	975.7–1032.8	18	29	1	4192	3	0–0.012
S1	131.8–132.3	3	8	4	1802	26	0–0.122
S2	468.5–479.5	3	7	2	686	2	0–0.012
S3	495.6–501.7	2	5	0	691	0	0
S4	768.7–774.4	2	6	0	440	0	0
S5	853.6	1	1	0	21/	0	0

^1/Low seed number was due to the absence of self and cross compatibility of sentinel trees and lack of gene flow from compatible plums outside of the S5 plot (GE or non-GE).