Diversity in Drought Traits among Commercial Southeastern US Peanut Cultivars

Table 2

Linear regression analysis of response to vapor pressure deficit based on the results from the High Temperature experiment. The number of data for each cultivar is listed in the column labeled 𝑛 and the data are followed by the standard error of the mean. For those cultivars represented by the two-segment regression, slope 1 is for the regression segment below the breakpoint and slope 2 is for the regression above the breakpoint. Break point values followed by the same letter are not significantly different based on their confidence limits.

High temperature experiment
Genotype	𝑛	Slope 1 ± S.E.	Break point (𝑋0) ± S.E.	Confidence limit of 𝑋0	Slope 2 ± S.E.	𝑋-intercept	𝑅^2
AT 3085	18	21.5 ± 6.41	1.81 ± 0.23 a	1.41 to 1.94	3.32 ± 3.55	0.79	0.71
C 99R	18	22.8 ± 2.63	1.94 ± 0.11 a	1.71 to 2.17	3.63 ± 1.87	0.88	0.94
GA 06G	18	21.0 ± 5.70	2.03 ± 0.12 ab	1.58 to 2.48	−2.90 ± 6.89	0.92	0.61
Tifrunner	18	31.5 ± 5.30	2.10 ± 0.08 b	1.95 to 2.26	−10.10 ± 3.22	0.92	0.80
AP 3	18	15.8 ± 2.99	2.10 ± 0.14 ab	1.78 to 2.41	−3.19 ± 3.00	0.72	0.81
C 76-16	18	35.1 ± 3.97	2.17 ± 0.16 ab	1.80 to 2.53	1.53 ± 4.87	0.94	0.92
GA 04S	17	16.0 ± 2.39	2.17 ± 0.19 ab	1.75 to 2.59	−1.27 ± 3.82	0.64	0.86
FL 07	18	22.8 ± 3.53	2.25 ± 0.13 b	1.96 to 2.54	−6.19 ± 3.40	0.87	0.89
		Slope	𝑌-intercept	𝑋-intercept	𝑅^2
York	16	22.3 ± 0.92	−20.0 ± 2.25	0.89	0.97