Table 3 Eigen-values of cotton fiber elongation with cotton cultivars of Simian 3 and Siza 3 under the elevated and ambient temperature regimes from 2010 to 2012.

Cultivars	Year	Temperature regime	R²	FED	FRED		V_max		Len_m (mm)	Len_obs (mm)
Cultivars	Year	Temperature regime	R²	FED	(d)	95% Conf.	(mm·d⁻¹)	95% Conf.	Len_m (mm)	Len_obs (mm)
Simian 3	2010	Elevated	0.997**	22	7	0.44	2.43	0.14	27.3	27.1 a
		Ambient	0.999**	27	9	0.31	2.04	0.06	27.7	27.6 a
		CTE (%)		−18.5	−22.2		19.1		−1.4	−1.8
	2011	Elevated	0.975**	26	9	0.17	2.10	0.04	28.5	28.5 a
		Ambient	0.981**	28	10	0.07	1.87	0.01	29.5	29.1 a
		CTE (%)		−7.1	−10.0		12.3		−3.5	−2.1
	2012	Elevated	0.988**	21	7	0.03	2.52	0.01	26.8	26.4 b
		Ambient	0.981**	25	8	0.09	2.18	0.02	27.7	27.5 a
		CTE (%)		−16.0	−12.5		15.6		−3.3	−4.0
CV across years (%)		Elevated			13.0		9.37		3.1	3.9
CV across years (%)		Ambient			11.0		7.44		3.6	3.2
Siza 3	2010	Elevated	0.996**	21	8	0.15	2.35	0.05	27.0	26.6 b
		Ambient	0.998**	30	11	0.19	1.69	0.03	29.0	28.7 a
		CTE (%)		−30.0	−27.3		39.1		−6.8	−7.3
	2011	Elevated	0.988**	24	8	0.13	2.38	0.04	29.0	28.7 b
		Ambient	0.983**	28	9	0.12	2.12	0.02	29.9	29.8 a
		CTE (%)		−14.3	−11.1		12.3		−2.8	−3.7
	2012	Elevated	0.987**	27	8	0.13	2.34	0.04	28.3	28.2 b
		Ambient	0.982**	32	9	0.15	2.12	0.03	29.0	29.0 a
		CTE (%)		−15.6	−11.1		10.4		−2.6	−2.8
CV across years (%)		Elevated			3.1		1.0		3.7	3.9
CV across years (%)		Ambient			12.7		12.7		1.7	2.0

FRED, fiber rapid−elongation duration; V_max, the maximum fiber elongation rate; 95% Conf., 95% confidence interval; Len_m, theoretical maximum fiber length; Len_obs, observed fiber length; CTE, Coefficient of temperature elevation; CV, Coefficient of variation; **significant difference at 0.05 probability level (n = 6, R² _0.05 = 0.6584, R² _0.01 = 0.8413; n = 9, R² _0.05 = 0.4440, R² _0.01 = 0.6354; n = 10, R² _0.05 = 0.3994, R² _0.01 = 0.5885). Values followed by a different letter within the same column are significantly different at 0.05 probability levels.

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