Fig. 6. Correlation coefficient (r) obtained between GI_12DAPM and mean air temperature occurred within 50°C-day intervals at different thermal time (TT) values between anthesis and PM (TT to PM = 440°C-day). Data belong to Q. Palomar cultivar sown on nine dates between 1996 and 1998. Each correlation included nine observations (df = 7). The only significant correlation was that obtained for the 300 to 350°C-day interval (P < 0.0001).

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