Table 3.

Significance of gene expression with genomic/nucleolar ratios

Chromosome	P(Sp < Schr)	Z	PGauss
1	—	4.1	2.2 × 10−5
2	—	4.0	3.8 × 10−5
3	—	4.7	1.2 × 10−6
4	1.5 × 10−4	2.8	0.0024
5	4.7 × 10−4	2.8	0.0023
6	2.7 × 10−4	2.7	0.0038
7	0.008	2.2	0.014
8	1 × 10−5	3.4	2.9 × 10−4
9	6.5 × 10−4	2.6	0.0043
10	4 × 10−5	3.1	9.1 × 10−4
11	1 × 10−5	3.4	2.1 × 10−4
12	—	4.2	1.5 × 10−5
13	0.053	1.5	0.067
14	5 × 10−5	3.0	0.0012
15	0.38	0.4	0.35
16	0.013	1.9	0.027
17	2.4 × 10−4	2.6	0.0047
18	9.4 × 10−4	2.5	0.059
19	—	3.6	1.4 × 10−4
20	0.0012	2.7	0.0031
21	1.2 × 10−4	3.1	8.2 × 10−4
22	3.3 × 10−4	2.6	0.0044

Significance was calculated by randomly shuffling expression values between gene loci for each chromosome. The second column gives the probability of chance alignment between gene expression peaks and nucleolar/genomic troughs, derived by comparing the actual alignment with random shuffles. When the actual alignment was outside the random distribution, the probability was estimated from a Gaussian distribution with the same mean and SD as in the random distribution. The third and fourth columns give the Gaussian Z-score and the corresponding probability. —, not.