Table 4 Correlation coefficients between daily mean temperatures of the 0–21 d before heading and pollen-fertility of PTGMS lines.

0–2

0.017

0.132

10–12

–0.444**

–0.499**

1–3

0.094

0.259

11–13

–0.381*

–0.546**

2–4

0.055

0.196

12–14

–0.353*

–0.533**

3–5

–0.075

0.002

13–15

–0.427*

–0.618**

4–6

–0.150

–0.062

14–16

–0.442*

–0.563**

5–7

–0.252

–0.260

15–17

–0.369*

–0.448*

6–8

–0.350*

–0.417*

16–18

–0.241

–0.214

7–9

–0.504**

–0.432*

17–19

–0.118

–0.005

8–10

–0.430*

–0.401*

18–20

–0.043

0.020

9–11

–0.400*

–0.403*

19–21

–0.004

0.047